Kiwi Ears KE4
- Added by Ianbanz
- Create date
Psycho-acoustic Masking
My regards to Kiwi Ears for managing to make this challenging tuning sound good. But it comes with some possible troubles to overcome. You may have to give your ears and brain’s auditory system time to adjust to the tonal balance of the KE4. My first listening experience was totally messed up due to psycho-acoustic masking. The strong lower frequencies masked the mid-bass and lower mids, making the treble sound thin and dull.I had to do EQ rehab. By tuning down the sub and tuning up the mid-bass, I nursed my ear-brain system to slowly recover the lost frequencies.
After hours of additional brain-in and burn-in—and one good night’s rest—I step by step neutralized the EQ settings back to zero, and “voilà,” there it was: the sound of KE4, as I believe it was meant to be interpreted.
Sound
The bass is deeply extended, powerful, round, and warm. The sub-bass and kick drum deliver pressure waves into your ears, making you really feel the sub. It’s not about articulated quality—it’s about volume, warmth, and feeling. The mid-bass is relaxed, with enough punch, presence, and warm timbre to lay a solid foundation for the mids.The mids are the star of the show. Forward, present, natural in tone, and very engaging. Acoustic instruments and voices have a full tone and rich harmonics. Vocals are close, without being in your face.
The treble is laid back, with enough detail, shimmer, and air to satisfy most listeners—including treble-sensitive ones. No sharpness or sibilance at all.
Summary
As you may have noticed from the words I use, this is not an analytical or technical IEM. It’s made to enjoy the music. Although it has good imaging in all directions and dynamic qualities that make the music very engaging.What’s unique about the KE4 is its sub-bass extension. You may like it or not. The Kiwi Ears engineering team has managed to balance it very well, with brilliant mids at the center, supported by deep, powerful bass and a very nicely laid-back treble. The tuning definitely brings out new musical experiences but also requires listening stamina. Maybe not from a hardcore basshead, but from people like me—who are used to moderately V-shaped to “old neutral” tuning.
Who am I?
I am an amateur audio enthusiast from Sweden.Attachments
Kiwi Ears is an emerging little brand that manufactures top-notch in-ear monitors and USB DAC dongles, all at prices that won’t break the bank.
The KE4 is a new model with a unique driver setup that includes a dual dynamic driver (2DD) isobaric subwoofer system, paired with two balanced armature drivers (2BA) that cover both mid-range and tweeter frequencies.
Technical stuff
The dual custom 10mm dynamic drivers are meticulously tuned to emphasize sub-bass impact and slam. Furthermore, the RAD 33518 balanced armature driver, designed with enhanced ventilation, ensures a seamless integration of bass frequencies with the midrange. Additionally, the incorporation of a Knowles RAD 33518 tweeter provides pristine, natural-sounding treble with exceptional upper-frequency extension.
The KE4 is equipped with a 3-way passive crossover system and three independent sound tubes, which facilitate the precise separation and blending of various frequencies.
Non Audio stuff
The ear-shells feature a robust construction made from medical-grade resin, presented in sleek black with hand-finished silver faceplates that showcase a stylish Kiwi Ears logo. The design is both simple and elegant, creating a beautiful aesthetic. The build quality is impressive, with earpieces that have a smooth finish and no visible imperfections.
The KE4 model is lightweight and anatomically designed, equipped with a medium-length sound tube. The included soft ear-tips enhance comfort, making these earphones ideal for prolonged use.
While their size is slightly large, resulting in a mild protrusion outside the ears, this doesn’t lead to discomfort. Additionally, passive noise isolation is very good, despite a small venting hole positioned at the top of each earpiece.
Cable and accessories
The package comes with a detachable cable, a set of ear tips in three different sizes, and a carrying case featuring a convenient side zipper. Priced at $199, this product competes in a market where many rivals offer modular cables and a wider selection of ear tips.
The four-core cable utilizes a 2-pin interface and is equipped with a 3.5mm plug. While the cable is well-constructed, it does appear somewhat delicate. It’s lightweight and fairly thin, with the plugs and splitter being unusually thick, giving it a slightly unconventional look. It tends to tangle, but it minimizes microphonic noise effectively.
Drivability
The KE4 has an impedance of 28Ω and sensitivity of 102dB, making it easy to drive and a perfect match for entry-level DAC dongles, such as the Kiwi Ears Allegro Mini. It also shows impressive scalability and truly shines with balanced sources like the FiiO M23 and the iBasso DX180.
Audio stuff
The Kiwi Ears KE4 delivers a well-rounded sound profile featuring impressive sub-bass extension and a slight emphasis on mid-bass. Its mid-range is neutrally tuned, complemented by treble that is smooth yet lively. This combination results in a warm and natural audio experience, making it a versatile choice that pairs nicely with a variety of sources and music genres. Whether you’re a discerning audiophile or a casual listener, the KE4 will satisfy—provided the former aren’t too critical, and the latter aren’t seeking overpowering bass or sharp treble.
This earphone utilizes a dual DD isobaric subwoofer system that masterfully reproduces the lowest octave, delivering deep notes without overshadowing other frequency ranges. The bass is not only punchy and impactful but also possesses a physical presence and rich texture, all while maintaining impressive control and precise timing. The low-end is full-bodied and substantial, showcasing excellent definition and clarity for its class. The KE4 manages to strike a perfect balance between technical prowess and a visceral listening experience, making it a remarkable choice.
The mid-bass response is subtly boosted yet remains true to a neutral sound profile, striking a fine balance between warmth and tonal accuracy. The KE4 offers an enjoyable listening experience with contemporary tracks while also adeptly handling classical music, preserving its tonal fidelity. It's truly a versatile earphone suited for anyone with a varied music collection.
Transitioning into the mid-range is smooth, free from any interference from the mid-bass frequencies. The tuning remains neutral, without any dips, alongside a slight emphasis on the upper mid-range that doesn’t come off as tiring. Vocals and instruments are presented with equal weight, and the overall balance is reflective of the recording itself rather than the KE4, which delivers a clear and uncolored sound.
The KE4 delivers an impressive level of resolution and clarity, making it stand out in its category with its beautifully refined textures and natural sound. The audio experience is both engaging and musical, characterized by organic qualities, accurate tones, and a rich variety of harmonics. Far from being clinical or tedious, the Kiwi Ears KE4 offers a melodic and expressive listening experience that powerfully connects the listener to their favorite tracks.
The treble is expertly tuned to provide a smooth and respectful presence, ensuring that it retains extension and vibrancy without overwhelming the listener. The KE4 brings a mild energy to the mix, showcasing brilliance and detail retrieval while steering clear of any harsh brightness or overly analytical qualities.
Some users might find the KE4 to be a bit too simple or lacking in excitement for their taste, but many will appreciate its laid-back charm and natural sound quality. The KE4 steers clear of harsh digital overtones or the artificial sound often associated with balanced armature drivers; instead, it delivers a sound that's incredibly lifelike and realistic, avoiding any elements that might be jarring or tiring. The way the drivers are implemented is exemplary, ensuring that texture and tonal coherence are preserved from the treble all the way to the bass.
While the soundstage is ample and airy, it lacks significant depth and doesn’t quite produce an out-of-head experience. That said, it does an excellent job of imaging and remains clear even when handling complex and dense tracks.
Comparison with the Kiwi Ears Quintet
For just $19 more, you can upgrade to the Kiwi Ears Quintet, a remarkable five-driver hybrid IEM. This model features an impressive combination of a diamond-like carbon dynamic (DLC) driver, two balanced armature (BA) drivers, a planar magnetic driver, and a piezoelectric (PZT) bone conductor. Both the Quintet and its counterpart have a similar shape and weight, ensuring a comparable level of comfort.
The Quintet stands out as a more technically precise and tonally accurate alternative to the KE4. It delivers equally extended sub-bass while offering a less colored mid-bass, a subtly emphasized upper mid-range, and vibrant, extended treble. Unlike the warmer, smoother sound of the KE4, the Quintet prioritizes technical accuracy and transparency without coming off as clinical. It's ideal for critical listening sessions, making it a better fit for those who value detail, whereas the KE4 is perfect for casual listening across a wider array of music genres.
Conclusion
The Kiwi Ears KE4 is an impressive pair of earphones that certainly stands out. With its balanced sound profile and strong technical performance, it handles a variety of audio excellently. The build quality is top-notch, featuring an aesthetically pleasing design and comfortable fit. However, the accessory pack could use some improvement to make it truly exceptional.
Despite this minor drawback, the KE4 secures its place as one of the best options in its category. It's perfect for those who seek a versatile, easy-to-listen earphone that complements all sources and delivers a delightful experience across different music genres.
-------------------------------------------------------------------------------
The review sample was kindly provided free of charge in exchange for an honest review. I don't use affiliate links. The price of the Kiwi Ears KE4 is $199 and you can buy it from here and here.
Disclaimer: For various Google indexing reasons, most parts of this review have been processed with an automatic paragraph rewriting tool. However it reads exactly the same as the original content that is available in my website.
The KE4 is a new model with a unique driver setup that includes a dual dynamic driver (2DD) isobaric subwoofer system, paired with two balanced armature drivers (2BA) that cover both mid-range and tweeter frequencies.
Technical stuff
The dual custom 10mm dynamic drivers are meticulously tuned to emphasize sub-bass impact and slam. Furthermore, the RAD 33518 balanced armature driver, designed with enhanced ventilation, ensures a seamless integration of bass frequencies with the midrange. Additionally, the incorporation of a Knowles RAD 33518 tweeter provides pristine, natural-sounding treble with exceptional upper-frequency extension.
The KE4 is equipped with a 3-way passive crossover system and three independent sound tubes, which facilitate the precise separation and blending of various frequencies.
Non Audio stuff
The ear-shells feature a robust construction made from medical-grade resin, presented in sleek black with hand-finished silver faceplates that showcase a stylish Kiwi Ears logo. The design is both simple and elegant, creating a beautiful aesthetic. The build quality is impressive, with earpieces that have a smooth finish and no visible imperfections.
The KE4 model is lightweight and anatomically designed, equipped with a medium-length sound tube. The included soft ear-tips enhance comfort, making these earphones ideal for prolonged use.
While their size is slightly large, resulting in a mild protrusion outside the ears, this doesn’t lead to discomfort. Additionally, passive noise isolation is very good, despite a small venting hole positioned at the top of each earpiece.
Cable and accessories
The package comes with a detachable cable, a set of ear tips in three different sizes, and a carrying case featuring a convenient side zipper. Priced at $199, this product competes in a market where many rivals offer modular cables and a wider selection of ear tips.
The four-core cable utilizes a 2-pin interface and is equipped with a 3.5mm plug. While the cable is well-constructed, it does appear somewhat delicate. It’s lightweight and fairly thin, with the plugs and splitter being unusually thick, giving it a slightly unconventional look. It tends to tangle, but it minimizes microphonic noise effectively.
Drivability
The KE4 has an impedance of 28Ω and sensitivity of 102dB, making it easy to drive and a perfect match for entry-level DAC dongles, such as the Kiwi Ears Allegro Mini. It also shows impressive scalability and truly shines with balanced sources like the FiiO M23 and the iBasso DX180.
Audio stuff
The Kiwi Ears KE4 delivers a well-rounded sound profile featuring impressive sub-bass extension and a slight emphasis on mid-bass. Its mid-range is neutrally tuned, complemented by treble that is smooth yet lively. This combination results in a warm and natural audio experience, making it a versatile choice that pairs nicely with a variety of sources and music genres. Whether you’re a discerning audiophile or a casual listener, the KE4 will satisfy—provided the former aren’t too critical, and the latter aren’t seeking overpowering bass or sharp treble.
This earphone utilizes a dual DD isobaric subwoofer system that masterfully reproduces the lowest octave, delivering deep notes without overshadowing other frequency ranges. The bass is not only punchy and impactful but also possesses a physical presence and rich texture, all while maintaining impressive control and precise timing. The low-end is full-bodied and substantial, showcasing excellent definition and clarity for its class. The KE4 manages to strike a perfect balance between technical prowess and a visceral listening experience, making it a remarkable choice.
The mid-bass response is subtly boosted yet remains true to a neutral sound profile, striking a fine balance between warmth and tonal accuracy. The KE4 offers an enjoyable listening experience with contemporary tracks while also adeptly handling classical music, preserving its tonal fidelity. It's truly a versatile earphone suited for anyone with a varied music collection.
Transitioning into the mid-range is smooth, free from any interference from the mid-bass frequencies. The tuning remains neutral, without any dips, alongside a slight emphasis on the upper mid-range that doesn’t come off as tiring. Vocals and instruments are presented with equal weight, and the overall balance is reflective of the recording itself rather than the KE4, which delivers a clear and uncolored sound.
The KE4 delivers an impressive level of resolution and clarity, making it stand out in its category with its beautifully refined textures and natural sound. The audio experience is both engaging and musical, characterized by organic qualities, accurate tones, and a rich variety of harmonics. Far from being clinical or tedious, the Kiwi Ears KE4 offers a melodic and expressive listening experience that powerfully connects the listener to their favorite tracks.
The treble is expertly tuned to provide a smooth and respectful presence, ensuring that it retains extension and vibrancy without overwhelming the listener. The KE4 brings a mild energy to the mix, showcasing brilliance and detail retrieval while steering clear of any harsh brightness or overly analytical qualities.
Some users might find the KE4 to be a bit too simple or lacking in excitement for their taste, but many will appreciate its laid-back charm and natural sound quality. The KE4 steers clear of harsh digital overtones or the artificial sound often associated with balanced armature drivers; instead, it delivers a sound that's incredibly lifelike and realistic, avoiding any elements that might be jarring or tiring. The way the drivers are implemented is exemplary, ensuring that texture and tonal coherence are preserved from the treble all the way to the bass.
While the soundstage is ample and airy, it lacks significant depth and doesn’t quite produce an out-of-head experience. That said, it does an excellent job of imaging and remains clear even when handling complex and dense tracks.
Comparison with the Kiwi Ears Quintet
For just $19 more, you can upgrade to the Kiwi Ears Quintet, a remarkable five-driver hybrid IEM. This model features an impressive combination of a diamond-like carbon dynamic (DLC) driver, two balanced armature (BA) drivers, a planar magnetic driver, and a piezoelectric (PZT) bone conductor. Both the Quintet and its counterpart have a similar shape and weight, ensuring a comparable level of comfort.
The Quintet stands out as a more technically precise and tonally accurate alternative to the KE4. It delivers equally extended sub-bass while offering a less colored mid-bass, a subtly emphasized upper mid-range, and vibrant, extended treble. Unlike the warmer, smoother sound of the KE4, the Quintet prioritizes technical accuracy and transparency without coming off as clinical. It's ideal for critical listening sessions, making it a better fit for those who value detail, whereas the KE4 is perfect for casual listening across a wider array of music genres.
Conclusion
The Kiwi Ears KE4 is an impressive pair of earphones that certainly stands out. With its balanced sound profile and strong technical performance, it handles a variety of audio excellently. The build quality is top-notch, featuring an aesthetically pleasing design and comfortable fit. However, the accessory pack could use some improvement to make it truly exceptional.
Despite this minor drawback, the KE4 secures its place as one of the best options in its category. It's perfect for those who seek a versatile, easy-to-listen earphone that complements all sources and delivers a delightful experience across different music genres.
-------------------------------------------------------------------------------
The review sample was kindly provided free of charge in exchange for an honest review. I don't use affiliate links. The price of the Kiwi Ears KE4 is $199 and you can buy it from here and here.
Disclaimer: For various Google indexing reasons, most parts of this review have been processed with an automatic paragraph rewriting tool. However it reads exactly the same as the original content that is available in my website.
Bosk
Headphoneus Supremus
Have you ever felt nervous taking on a challenge you weren't sure you were up for?
Many would argue challenging ourselves is a vital component to personal growth, but battling in a completely different weight division can be exceptionally daunting.
Which brings me to Kiwi Ears - a brand I'd always associated with budget earphones under $100. Actually one of my first reviews was of their Cadenzas which impressed me greatly for their $35 asking price, they were so surprisingly good I purchased their Quartets as well.
However when Kiwi Ears offered to send me a pair of their $199 KE4s in exchange for my thoughts I immediately wondered how they'd fare producing earphones at a notably higher pricepoint.
Once people start paying a few hundred dollars expectations go up markedly, and any shortcomings become harder to ignore since competition is fierce. How do the KE4s stack up? Read on to learn.
The USD $199 Kiwi Ears KE4s arrive in a compact cardboard box, inside is a small fabric carry case, two pair of nozzle filters and three sets of silicone eartips.
The carry case is small enough to comfortably fit inside a pocket, and although it doesn't inspire feelings of quality is perfectly suitable for its' intended purpose being quite protective.
Sadly the included 2pin stock cable is only available in 3.5mm termination which is disappointing at this pricepoint, though the cable itself feels decently well-built.
The KE4s' boast medical-grade resin shells with hand-finished faceplates, and though I find the faceplates somewhat dull you'd never guess the IEMs come in at under $200 given how nice they feel.
The shells are superbly smooth and very well sculpted to the ear, fit is of course always a very personal thing but I've found them immensely comfortable for multi-hour sessions.
Isolation is also quite good, aided by their considerable mass - which is on the slightly larger side of the spectrum by modern hybrid standards.
I used a Luxury & Precision W4 dongle set to 42 volume with a Penon Totem USB-C cable to evaluate the KE4s, as I generally listen at lower volumes. Here is the Tidal Playlist used to evaluate IEMs.
The KE4s utilise 2DDs in isobaric configuration for bass, one BA for mids & another BA for treble. Their character is smooth & well balanced, with slightly emphasised sub bass & uppper midrange and fairly sedate, inoffensive treble. I find them mildly reminiscent of Harman tuned IEMs.
Bass
KE4 bass output is very capable with ample quantity for bass-driven music. I find there’s a slight emphasis towards sub bass, and feel a little more midbass presence would’ve been nice to give instruments like cellos some extra weight.
Sadly KE4 bass texture isn’t the greatest – this is often the hallmark of 2DD IEMs, who’s bass can decay fairly quickly which is terrific for overall responsiveness but can leave you missing some of that visceral meatiness IEMs with slower single-DDs can possess.
Bass is by no means lacklustre, but I wouldn't call it class-leading at this pricepoint.
Midrange
The KE4 midrange is slight skewed towards emphasising upper midrange which aids vocal articulation, and indeed vocal resolution is correspondingly impressive for this price. However there's a lack of earthiness, which means vocals can feel a little floaty and lacking in weight at times.
Instruments like guitars are articulated extremely well despite the smooth overall character of the KE4, yet I’d love a bit more warmth to give voices more body.
Tonally the KE4s are quite neutral which leads to them sounding very clear & distinct, there's a slight reminiscence of the nasally upper-midrange forwardness of Harman IEMs but it's very minor.
Treble
Treble is fairly muted on the KE4s, and I find treble notes tend to lack solidity and will at times feel grainy, but that’s to be expected from an IEM in this price with a just two BA drivers.
Treble notes lack the body & sweetness present in high-end earphones (particularly those with EST drivers) and violins can come across as a little shaky & indistinct.
That said if you're particularly treble sensitive you're unlikely to encounter issues with the KE4s.
KE4 resolution is slightly below average, not vague enough to feel important details are being obscured but I do need to hunt for details occasionally, and notes can feel slightly blunted & soft.
Dynamics are slightly disappointing, largely caused by the stock cable. Upgrading to almost any balanced cable rectifies this greatly, but out of the box dynamics are below par.
Soundstage is about average for this price range, there is some sense of depth but width is slightly narrower than many other IEMs under $500. Again this is another attribute improvable with a better cable.
Imaging & separation aren’t bad, more treble emphasis would probably help here. The KE4s are not technical monsters even at their respective pricepoint, but instead encourage you to focus your attention on their smooth, non-fatiguing nature.
I used a L&P W4 at 42 volume with a Penon Totem USB-C cable to compare the KE4s to other IEMs.
Tansio Mirai FEAT - 2xDD 2xBA (USD $239)
FEATs' DDs are noticeably slower and can sound sluggish at times, although bass decay is a bit slower & more satisfying as a result. KE4 tends to integrate its' DDs with BA drivers a bit more coherently though.
FEAT is brighter but treble stands out from other frequencies unnaturally at times, instruments sound larger for some reason, and though its' soundstage is narrower imaging feels a bit sharper.
Tonally I find FEAT sounds a bit more hollow, lacking some of KE4's refinement.
Simgot EA1000 - 1xDD 1xPassive Radiator (USD $219) with LC7 Cable (USD $69)
It's immediately obvious the EA1000s are far more dynamic, with a more forward midrange that's better articulated but a bit thinner in weight, that emphasises clarity over warmth more than the KE4s.
Bass texture and overall quality isn't quite as high, nor are the EA1000s as refined as the KE4s which delineate instruments more effectively - probably due to their higher driver count.
The EA1000s often feel like they're throwing detail in my face, and are a lot more upfront with a slightly narrower but deeper stage and a slightly blacker background.
ISN H60 - 2xDD 4xBA (USD $349)
This is tough competition given the H60s are my favourite IEMs under $500. They're far more dynamic, and despite being warmer have more pronounced treble and a more forward midrange as well.
Resolution is a notch higher and slightly more effortless on the H60s, which boast a slightly narrower but deeper stage, blacker background & better note weight.
Bass texture is a slightly more satisfying on the H60s too, with slower decay yielding more slam.
Penon Turbo - 6xBA (USD $549)
The Turbos' BA bass decays much faster and is generally less satisfying, but they certainly make the KE4s sound more slugglish at other frequencies.
The Turbos push the upper midrange forward quite a bit more, and can be fatiguing as a result with tonality I don't like nearly as much as the KE4's smoother approach.
On the technical front however the Turbos pull way ahead, with a wider & deeper stage, much more space around each instrument, better dynamics and higher resolution across most frequencies.
I tested the KE4s with other cables to gauge how they scale. These changes are unusually dramatic, since the KE4 stock cable is 3.5mm - so upgrading to a balanced cable yields greater improvements.
NiceHCK BlackCat Ultra (USD $57)
The 8 wire BlackCat cable improves dynamics, and resolution goes up dramatically too.
The stage is much wider & slightly deeper, midbass feels slightly more accentuated but the tonality of the stock cable is preserved quite well in this solid pairing.
Penon Vocal (USD $69)
Dynamics are much improved and bass slam is a bit more satisfying. Resolution is also higher, imaging is sharper and the soundstage is much deeper.
Clearly swapping from an unbalanced to a 4.4mm cable has huge benefits, this very impressive pairing makes the stock cable sound mushy & vague.
NiceHCK FirstTouch (USD $89)
The stage is much wider but there's not much more depth, imaging & dynamics are improved, and vocals feel spotlit as this cable is tonally quite midcentric.
There's less bass & treble boost than with the other balanced cables, overall character is fairly but imaging could be slightly better. Still a good improvement on the stock cable due to the broader stage.
Effect Audio Ares S 4 Wire (USD $179)
Dynamics are improved, bass feels more impactful and the stage is both deeper & wider. Imaging is also slightly sharper.
There's a small amount of extra warmth which improves musicality, this cables feels a bit less fatiguing than vocal though dynamics may not be boosted quite as much, but it's a solid pairing.
The Kiwi Ears KE4s are an extremely solid choice under $200.
Its common to encounter earphones at similar prices that are brash & aggressive. Which isn't a bad thing, but IEMs that try to bully you into being impressed at first listen often lose appeal quite quickly.
The KE4s are different. Instead they're smooth & refined which one doesn't often encounter in lower price brackets, and I suspect many discerning collectors will find a place for them on that basis alone.
Technical performance is solid without being amazing, they feel well-built and comfortable, in fact my only real gripe is the stock cable where a balanced 4.4mm option would've be preferred.
Regardless, The KE4s represent good value under $200 if you're looking for a more sophisticated, refined sound that won't fatigue but instead rewards with a glimpse of the refinement of TOTL IEMs.
Well done Kiwi Ears on reaching the next level. Here's hoping they disrupt the $1000+ bracket next!
Many would argue challenging ourselves is a vital component to personal growth, but battling in a completely different weight division can be exceptionally daunting.
Which brings me to Kiwi Ears - a brand I'd always associated with budget earphones under $100. Actually one of my first reviews was of their Cadenzas which impressed me greatly for their $35 asking price, they were so surprisingly good I purchased their Quartets as well.
However when Kiwi Ears offered to send me a pair of their $199 KE4s in exchange for my thoughts I immediately wondered how they'd fare producing earphones at a notably higher pricepoint.
Once people start paying a few hundred dollars expectations go up markedly, and any shortcomings become harder to ignore since competition is fierce. How do the KE4s stack up? Read on to learn.
Packaging
The USD $199 Kiwi Ears KE4s arrive in a compact cardboard box, inside is a small fabric carry case, two pair of nozzle filters and three sets of silicone eartips.
The carry case is small enough to comfortably fit inside a pocket, and although it doesn't inspire feelings of quality is perfectly suitable for its' intended purpose being quite protective.
Sadly the included 2pin stock cable is only available in 3.5mm termination which is disappointing at this pricepoint, though the cable itself feels decently well-built.
Ergonomics
The KE4s' boast medical-grade resin shells with hand-finished faceplates, and though I find the faceplates somewhat dull you'd never guess the IEMs come in at under $200 given how nice they feel.
The shells are superbly smooth and very well sculpted to the ear, fit is of course always a very personal thing but I've found them immensely comfortable for multi-hour sessions.
Isolation is also quite good, aided by their considerable mass - which is on the slightly larger side of the spectrum by modern hybrid standards.
Sound Impressions
I used a Luxury & Precision W4 dongle set to 42 volume with a Penon Totem USB-C cable to evaluate the KE4s, as I generally listen at lower volumes. Here is the Tidal Playlist used to evaluate IEMs.
The KE4s utilise 2DDs in isobaric configuration for bass, one BA for mids & another BA for treble. Their character is smooth & well balanced, with slightly emphasised sub bass & uppper midrange and fairly sedate, inoffensive treble. I find them mildly reminiscent of Harman tuned IEMs.
Bass
KE4 bass output is very capable with ample quantity for bass-driven music. I find there’s a slight emphasis towards sub bass, and feel a little more midbass presence would’ve been nice to give instruments like cellos some extra weight.
Sadly KE4 bass texture isn’t the greatest – this is often the hallmark of 2DD IEMs, who’s bass can decay fairly quickly which is terrific for overall responsiveness but can leave you missing some of that visceral meatiness IEMs with slower single-DDs can possess.
Bass is by no means lacklustre, but I wouldn't call it class-leading at this pricepoint.
Midrange
The KE4 midrange is slight skewed towards emphasising upper midrange which aids vocal articulation, and indeed vocal resolution is correspondingly impressive for this price. However there's a lack of earthiness, which means vocals can feel a little floaty and lacking in weight at times.
Instruments like guitars are articulated extremely well despite the smooth overall character of the KE4, yet I’d love a bit more warmth to give voices more body.
Tonally the KE4s are quite neutral which leads to them sounding very clear & distinct, there's a slight reminiscence of the nasally upper-midrange forwardness of Harman IEMs but it's very minor.
Treble
Treble is fairly muted on the KE4s, and I find treble notes tend to lack solidity and will at times feel grainy, but that’s to be expected from an IEM in this price with a just two BA drivers.
Treble notes lack the body & sweetness present in high-end earphones (particularly those with EST drivers) and violins can come across as a little shaky & indistinct.
That said if you're particularly treble sensitive you're unlikely to encounter issues with the KE4s.
Technical Performance
KE4 resolution is slightly below average, not vague enough to feel important details are being obscured but I do need to hunt for details occasionally, and notes can feel slightly blunted & soft.
Dynamics are slightly disappointing, largely caused by the stock cable. Upgrading to almost any balanced cable rectifies this greatly, but out of the box dynamics are below par.
Soundstage is about average for this price range, there is some sense of depth but width is slightly narrower than many other IEMs under $500. Again this is another attribute improvable with a better cable.
Imaging & separation aren’t bad, more treble emphasis would probably help here. The KE4s are not technical monsters even at their respective pricepoint, but instead encourage you to focus your attention on their smooth, non-fatiguing nature.
IEM Comparisons
I used a L&P W4 at 42 volume with a Penon Totem USB-C cable to compare the KE4s to other IEMs.
Tansio Mirai FEAT - 2xDD 2xBA (USD $239)
FEATs' DDs are noticeably slower and can sound sluggish at times, although bass decay is a bit slower & more satisfying as a result. KE4 tends to integrate its' DDs with BA drivers a bit more coherently though.
FEAT is brighter but treble stands out from other frequencies unnaturally at times, instruments sound larger for some reason, and though its' soundstage is narrower imaging feels a bit sharper.
Tonally I find FEAT sounds a bit more hollow, lacking some of KE4's refinement.
Simgot EA1000 - 1xDD 1xPassive Radiator (USD $219) with LC7 Cable (USD $69)
It's immediately obvious the EA1000s are far more dynamic, with a more forward midrange that's better articulated but a bit thinner in weight, that emphasises clarity over warmth more than the KE4s.
Bass texture and overall quality isn't quite as high, nor are the EA1000s as refined as the KE4s which delineate instruments more effectively - probably due to their higher driver count.
The EA1000s often feel like they're throwing detail in my face, and are a lot more upfront with a slightly narrower but deeper stage and a slightly blacker background.
ISN H60 - 2xDD 4xBA (USD $349)
This is tough competition given the H60s are my favourite IEMs under $500. They're far more dynamic, and despite being warmer have more pronounced treble and a more forward midrange as well.
Resolution is a notch higher and slightly more effortless on the H60s, which boast a slightly narrower but deeper stage, blacker background & better note weight.
Bass texture is a slightly more satisfying on the H60s too, with slower decay yielding more slam.
Penon Turbo - 6xBA (USD $549)
The Turbos' BA bass decays much faster and is generally less satisfying, but they certainly make the KE4s sound more slugglish at other frequencies.
The Turbos push the upper midrange forward quite a bit more, and can be fatiguing as a result with tonality I don't like nearly as much as the KE4's smoother approach.
On the technical front however the Turbos pull way ahead, with a wider & deeper stage, much more space around each instrument, better dynamics and higher resolution across most frequencies.
Cable Comparisons
I tested the KE4s with other cables to gauge how they scale. These changes are unusually dramatic, since the KE4 stock cable is 3.5mm - so upgrading to a balanced cable yields greater improvements.
NiceHCK BlackCat Ultra (USD $57)
The 8 wire BlackCat cable improves dynamics, and resolution goes up dramatically too.
The stage is much wider & slightly deeper, midbass feels slightly more accentuated but the tonality of the stock cable is preserved quite well in this solid pairing.
Penon Vocal (USD $69)
Dynamics are much improved and bass slam is a bit more satisfying. Resolution is also higher, imaging is sharper and the soundstage is much deeper.
Clearly swapping from an unbalanced to a 4.4mm cable has huge benefits, this very impressive pairing makes the stock cable sound mushy & vague.
NiceHCK FirstTouch (USD $89)
The stage is much wider but there's not much more depth, imaging & dynamics are improved, and vocals feel spotlit as this cable is tonally quite midcentric.
There's less bass & treble boost than with the other balanced cables, overall character is fairly but imaging could be slightly better. Still a good improvement on the stock cable due to the broader stage.
Effect Audio Ares S 4 Wire (USD $179)
Dynamics are improved, bass feels more impactful and the stage is both deeper & wider. Imaging is also slightly sharper.
There's a small amount of extra warmth which improves musicality, this cables feels a bit less fatiguing than vocal though dynamics may not be boosted quite as much, but it's a solid pairing.
Conclusion
The Kiwi Ears KE4s are an extremely solid choice under $200.
Its common to encounter earphones at similar prices that are brash & aggressive. Which isn't a bad thing, but IEMs that try to bully you into being impressed at first listen often lose appeal quite quickly.
The KE4s are different. Instead they're smooth & refined which one doesn't often encounter in lower price brackets, and I suspect many discerning collectors will find a place for them on that basis alone.
Technical performance is solid without being amazing, they feel well-built and comfortable, in fact my only real gripe is the stock cable where a balanced 4.4mm option would've be preferred.
Regardless, The KE4s represent good value under $200 if you're looking for a more sophisticated, refined sound that won't fatigue but instead rewards with a glimpse of the refinement of TOTL IEMs.
Well done Kiwi Ears on reaching the next level. Here's hoping they disrupt the $1000+ bracket next!
Hi everyone, today I'll be sharing my thoughts about the Kiwi ears ke4. This review is way behind the schedule but let's get into it.
I got this sample from Kiwi ears themselves about 6 weeks ago and was using alongside my Quintet and s12 pro.
Ke4 is a 2 dynamic driver 2 BA hybrid set that comes at 199 dollars.
For this price you get the IEM's, 1 hard case and just 1 set of eartips.
Case is really good, I have the same case from Quintet and It's perfectly pocketable.
Cable is a standard 4 core with fixed terminations and jack.
It would have been nice to have a 4.4 mm version or even an interchangeable cable system but I think it's good enough.
Eartips are a new addition from the Kiwi Ears, they are called flex eartips.
I honestly really love the design of these eartips; they are just perfect for me; it's firm and grippy enough to seal perfectly while not causing any issue with the comfort whatsoever.
And as you can see they have an in built wax protector. It might not look much but this is very important to keep your iems safe and clean. I look forward to see alternative versions of these eartips like double flange and wide bore.
IEM design is a very comfortable semi custom fit. My only issue is they portrude a little bit from my ears compared to Quintet's flush fit. But all in all very comfortable.
And let's get into sound.
Ke4 is tuned with the latest available information about the audio gear.
For those who don’t know the overall idea of "neutral" in iems and headphones have been evolving rapidly with the introduction of advanced measurement rig B&K 5128.
These advancements helped us to understand why some people don't like the way IEM's sound despite how well tuned they are and strictly prefer headphones over in ears.
And we have a new target curve for these people; JM1. Jm 1 target is a direct result of latest information we've got from 5128 and old research from harman acoustics.
And Ke4 is a perfect option for those who strictly prefer the over ear headphones.
Especially if you prefer warmer headphones.
General tuning is neutral with the Bass boost. But unlike similarly tuned older models ke4 puts a heavy emphasis on lower mid range.
Older models had a tendency to boost some certain frequency ranges in treble to add a sense of contrast to the sound. And this was one of the reasons why some people didn’t like in ears.
Ke4's treble is silky smooth with the exception of 15k, there's a small peak at that range but it's not bothersome at all.
To me these iems sound natural, smooth and very pleasing.
My only issue is the Bass.
Now let me be clear; bass is not bloated boomy. It's relatively over pronounced but it's due to way the mid-range is tuned, not because it's too much.
My issue is more closely related to notion of wrong tool for the right work.
Back to the topic of measurements and tuning there was a certain thing about the mid range in iems that were tuned with older tuning metadology; there was a slight dip at 400hz on every neutral with bass boost IEM.
This dip combined with the certain treble peaks essentially gave a certain sense of separation and headstage.
And this is also one of the reasons behind the notion of "Bass boost that starts from 200hz"
For these older versions 200hz bass boost was the way to go because it both added a fun factor and made vocals more lively rather than sterile.
But again this created an issue for the certain minority who didn’t like the way this tuning sounds.
Ke4 funnily adressed that issue but also created a new problem, a problem that no one really see up until now. I'm not sure even if the people who worked on jm1 has noticed this.
Since jm1 target has a slightly more pronounced yet neutral lower mids and more laid-back treble it naturally favors the Bass frequencies. Even we didn't boosted the Bass with a bass shelf it wouldn't sound boring.
And because KE4 has a bass shelf on top of an already relatively warm base tuning, bass notes sound extra thick.
When a bass shelf at 200 hz is combined with the extremely linear and smooth mid range and treble essentially causes the Bass to be the dominant frequency.
Like I said this is a perfect example of wrong tool for the right job.
And my solution is simple; just put a tape over the back vent. İt lowers the Bass shelf but I'm not sure how much. But the dynamics and overall bas presence gets an improvement.
And you can also put a low shelf filter around 170hz. This essentially moves the Bass shelf to the 150hz.
This keeps the natural timbre but adds that sense of separation from bass to mids.
And speaking of EQ KE4 is a perfect IEM to experiment with.
Each driver is tuned and damped perfectly. This makes using this iems with eq a joy.
It's so easy to tweak and boost certain frequencies.
Comparisons.
Vs Kiwi ears Quintet; neither is better or worse than eachother. Honestly I think these 2 are perfectly matched against eachother.
To me Quintet is the benchmark of sub 250dollars and while it can be hot in treble. But I like it for what it is; a highly resolving budget hybrid.
Altough its close to JM1 target it still retains the older tuning philosophy. It has slightly boosted treble and a slight notch at 400hz. So it does sound slightly different from KE4. But resolution wise I'd say even with the eq Quintet sounds more resolving and clear than ke4.
Transients are faster, notes are more incisive and overall imaging is better.
But it can be fatiquing for some people. Especially for those who prefer headphones over in ears.
So for this case KE4 is better. In fact I like ke4 for some genres over Quintet. Ke4 sounds smoother and delicate than Quintet in most cases and it's definitely better in eq.
Vs s12 pro.
S12 pro has more detail but it's tuning is not as natural as the ke4.
İt's also less dynamic sounding. Again ke4 is definitely smoother in this area.
Vs hexa.
Hexa is kinda polar opposite of ke4.
While ke4 is bas dominant hexa is treble dominant.
Also ke4 has slightly more detail than hexa.
But they are close.
Conclusion.
Ke4 is the perfect representation of jm1 target, both it's pro's and cons.
For 200 dollars there are more resolving iems than it. And there are iems that have similar level of details at lower price ranges. But none of them sounds as smooth as ke4.
And sure I can use eq to get a similar results but I'd rather not.
Altough bass is rather dominant I honestly really don't think it's a major issue. İn fact for most of people it might even be better. And if not solution is only a tape mod away
Just cover the vent and you've got an in ear hd650.
I got this sample from Kiwi ears themselves about 6 weeks ago and was using alongside my Quintet and s12 pro.
Ke4 is a 2 dynamic driver 2 BA hybrid set that comes at 199 dollars.
For this price you get the IEM's, 1 hard case and just 1 set of eartips.
Case is really good, I have the same case from Quintet and It's perfectly pocketable.
Cable is a standard 4 core with fixed terminations and jack.
It would have been nice to have a 4.4 mm version or even an interchangeable cable system but I think it's good enough.
Eartips are a new addition from the Kiwi Ears, they are called flex eartips.
I honestly really love the design of these eartips; they are just perfect for me; it's firm and grippy enough to seal perfectly while not causing any issue with the comfort whatsoever.
And as you can see they have an in built wax protector. It might not look much but this is very important to keep your iems safe and clean. I look forward to see alternative versions of these eartips like double flange and wide bore.
IEM design is a very comfortable semi custom fit. My only issue is they portrude a little bit from my ears compared to Quintet's flush fit. But all in all very comfortable.
And let's get into sound.
Ke4 is tuned with the latest available information about the audio gear.
For those who don’t know the overall idea of "neutral" in iems and headphones have been evolving rapidly with the introduction of advanced measurement rig B&K 5128.
These advancements helped us to understand why some people don't like the way IEM's sound despite how well tuned they are and strictly prefer headphones over in ears.
And we have a new target curve for these people; JM1. Jm 1 target is a direct result of latest information we've got from 5128 and old research from harman acoustics.
And Ke4 is a perfect option for those who strictly prefer the over ear headphones.
Especially if you prefer warmer headphones.
General tuning is neutral with the Bass boost. But unlike similarly tuned older models ke4 puts a heavy emphasis on lower mid range.
Older models had a tendency to boost some certain frequency ranges in treble to add a sense of contrast to the sound. And this was one of the reasons why some people didn’t like in ears.
Ke4's treble is silky smooth with the exception of 15k, there's a small peak at that range but it's not bothersome at all.
To me these iems sound natural, smooth and very pleasing.
My only issue is the Bass.
Now let me be clear; bass is not bloated boomy. It's relatively over pronounced but it's due to way the mid-range is tuned, not because it's too much.
My issue is more closely related to notion of wrong tool for the right work.
Back to the topic of measurements and tuning there was a certain thing about the mid range in iems that were tuned with older tuning metadology; there was a slight dip at 400hz on every neutral with bass boost IEM.
This dip combined with the certain treble peaks essentially gave a certain sense of separation and headstage.
And this is also one of the reasons behind the notion of "Bass boost that starts from 200hz"
For these older versions 200hz bass boost was the way to go because it both added a fun factor and made vocals more lively rather than sterile.
But again this created an issue for the certain minority who didn’t like the way this tuning sounds.
Ke4 funnily adressed that issue but also created a new problem, a problem that no one really see up until now. I'm not sure even if the people who worked on jm1 has noticed this.
Since jm1 target has a slightly more pronounced yet neutral lower mids and more laid-back treble it naturally favors the Bass frequencies. Even we didn't boosted the Bass with a bass shelf it wouldn't sound boring.
And because KE4 has a bass shelf on top of an already relatively warm base tuning, bass notes sound extra thick.
When a bass shelf at 200 hz is combined with the extremely linear and smooth mid range and treble essentially causes the Bass to be the dominant frequency.
Like I said this is a perfect example of wrong tool for the right job.
And my solution is simple; just put a tape over the back vent. İt lowers the Bass shelf but I'm not sure how much. But the dynamics and overall bas presence gets an improvement.
And you can also put a low shelf filter around 170hz. This essentially moves the Bass shelf to the 150hz.
This keeps the natural timbre but adds that sense of separation from bass to mids.
And speaking of EQ KE4 is a perfect IEM to experiment with.
Each driver is tuned and damped perfectly. This makes using this iems with eq a joy.
It's so easy to tweak and boost certain frequencies.
Comparisons.
Vs Kiwi ears Quintet; neither is better or worse than eachother. Honestly I think these 2 are perfectly matched against eachother.
To me Quintet is the benchmark of sub 250dollars and while it can be hot in treble. But I like it for what it is; a highly resolving budget hybrid.
Altough its close to JM1 target it still retains the older tuning philosophy. It has slightly boosted treble and a slight notch at 400hz. So it does sound slightly different from KE4. But resolution wise I'd say even with the eq Quintet sounds more resolving and clear than ke4.
Transients are faster, notes are more incisive and overall imaging is better.
But it can be fatiquing for some people. Especially for those who prefer headphones over in ears.
So for this case KE4 is better. In fact I like ke4 for some genres over Quintet. Ke4 sounds smoother and delicate than Quintet in most cases and it's definitely better in eq.
Vs s12 pro.
S12 pro has more detail but it's tuning is not as natural as the ke4.
İt's also less dynamic sounding. Again ke4 is definitely smoother in this area.
Vs hexa.
Hexa is kinda polar opposite of ke4.
While ke4 is bas dominant hexa is treble dominant.
Also ke4 has slightly more detail than hexa.
But they are close.
Conclusion.
Ke4 is the perfect representation of jm1 target, both it's pro's and cons.
For 200 dollars there are more resolving iems than it. And there are iems that have similar level of details at lower price ranges. But none of them sounds as smooth as ke4.
And sure I can use eq to get a similar results but I'd rather not.
Altough bass is rather dominant I honestly really don't think it's a major issue. İn fact for most of people it might even be better. And if not solution is only a tape mod away
Just cover the vent and you've got an in ear hd650.
Unaffiliated Links
Kiwi Ears Official Website
( INDIA ) The Audio Store
( INDIA ) ConceptKart
Linsoul Official Website
Hangout Audio Store
AMAZON Website
INTRODUCTION
This is my introduction to Kiwi Ears. I never used their products before, so I didn’t have any idea what to expect from them, so I approached the review of KE4 while having a black state in my mind. Saying so, I know KE4 is a hyped-up product in current scenario, and it dictates a tuning choice that is called “New Meta” which is the given name of IEMs that are tuned while keeping JM1-DF in mind.
What is JM1-DF? (The NEW META)
As we all know we hear sounds very differently, and so do Couplers. Recently B&K introduced their newest coupler 5128 on the market. Which is supposed to be a more accurate version of the Coupler IEC 711, still getting used largely in the community. There is a huge jump in the accuracy of the graphs in 5128. But due to some reason there are still some slight abnormalities that can be seen in the upper-mids / lower treble.
So JM1-DF is simply the corrected version of the 5128 Diffuse Field to give you a more natural sound (on an average ear).
[We all hear IEMs differently even if they produce the exact same sound (due to acoustic impedance and anatomy related to that). This is what we call HrTF (Head Related Transfer Function), which simply makes us distinguish spatial information generally and contributes to the individual liking of the headphones/earphones (Example – Some might find a headphone peaky, and some are not). So, to continue studies in audio we can’t rely on a single person or single direction (Remember, every direction represents a different curve), thus we use average of a sample. Which is called diffuse field (In other words, average of all directions). And We are talking about 5128’s diffuse field in the name JM1-DF].
UNBOXING
The KE4 comes in an average box. It’s neither too appealing nor too cheap to call it an issue. Apart from IEM and cable it comes with -
- Case – The case is well thought out to hold the IEM. It fits perfectly with a dongle DAC. Small enough for every pocket, be it Jeans or trousers. It imprints Kiwi Ears Logo in the front and feels like cloth, made from rugged material which is one of the best-case materials. It houses a net to keep accessories in the case separated from the IEM.
- Eartips – The ear tips are very average though. It feels extremely comfortably to my ears, but the seal was not that good, although I had zero problems would rate it above average for its comfort. The best thing it had is the earwax guard which I think is a much-needed practice to follow in the audio since people have dirty ears. But it does interfere with the sound a bit. Divinus Velvet is a somewhat better upgrade over the stock ear tips which gave me a bit of the detail boost as well as the more open upper registers.
- Mesh Filters – I don’t think that they have moisture absorption capabilities, that you must confirm from somewhere else, but the added filters are a good touch to the overall package. I wish more companies would start to include filters along with the IEMs.
STOCK CABLE
Stock cable on the KE4 is average too. It is not too thick, which is a good thing for me. I only experienced tangle once in 10days. The splitter is extremely well built. Ear-hooks are flexible enough not to cause me even a bit of discomfort. Microphonics are not there in the cable. My set came with a 3.5mm termination and lastly, I have no complaint about the memory of the cable. The cable doesn’t look that appealing but does the job where I don’t have any problem.
FIT
The buds are on the medium side, and they properly fit my ears. The contour is not that aggressive, which helps in the fit too. The nozzle is a tiny bit larger than the average and on the same ballpark as the Hype series. Nozzle is not too long or short and provides a great seal with fitness. Although it is not comfortable while sleeping sideways.
DESIGN
The design of KE4 is very minimalist. Bland, simple and works. Personally, I am not a fan of the look of the IEM but who cares if it fits properly? Although I previously thought that the branding on the faceplate might look a bit ugly but in real life, it looks quite good. I wouldn’t have liked the blank faceplate even a bit. I love good looking IEMs and unfortunately this IEM didn’t pass the bar.
One thing about the design I liked a lot is the vent position. I ride bikes and IEMs come in handy while riding on long highways, which keeps me awake and aware. But due to the vent position I can get quite comfortable while riding the bike since I don’t have to worry about dirt/moisture getting into the IEM with wind.
POWER REQUIREMENTS
I have heard about KE4 being dependent on very high power but to my surprise it does sound good on all my devices. More power does give it a much-needed heft, but it does sound OK on low-powered devices. Let’s talk about the power requirements of the KE4,
Sources -
POCO X2 – Just does the fundamental tonality current. The dynamics felt missing, and the soundstage seemed on the face.
Moondrop Dawn Pro – The dynamics got restored, the bass got more confident and richer. The details and spatial effects got a huge booth.
JDS ATOM 2 - KE4 sounded very full, and the resolution seemed the same as the Moondrop Dawn Pro. The heights seemed clearer and airy above 10Khz.
RoseTechnics RT5000 – The soundstage for a massive boost. It sounded like a $500 IEM; the only drawback was the detail retrieval and sense of positioning.
KAEI TAP1 – Extremely pleasing and organic sound. Beautiful tonality, OK tech but these two are made for each other.
SOUND
Coming to the single most deciding factor of the worthiness of an IEM for me, we will be discussing the Sound Quality of KE4 in two sections, Subjective (Which is personal to me and might not affect you unless you share same taste with me) and another one is Objective (Should be applicable to everyone). Before starting this section, I must declare that I am conducting this review after evaluating this IEM for more than 50 hours (After burn-in). Anything I say in the review is completely honest with my findings and no one paid or influenced me to say anything good or bad about this product.
X-FACTOR
The X-FACTOR of KE4 is the neutral nature of the sound. Audiophile community is divided into two parts as of my understanding. A part of the community chases the truest nature of the sound and another part of the community chases fun. And I envy the later ones. But if you ask me for my own/personal preferences I always chase neutral/natural sound signatures. And KE4 provides that with decent colouration in the low-end. And this is what separates it from the rest of the IEMs at this price range.
If I must describe the Sound of the KE4 by just a word it would be “Neutral”.
OBJECTIVE SOUND QUALITY
BASS
The bass of KE4 is elevated quite a bit for a neutrally tuned IEM. The bass is not enough for someone who likes bass since the midbass is not that prominent, but it does provide the midrange with a neutral tune.
Sub-bass: The subbass of KE4 is quite authoritative. It has the quality of feeling atmosphere is the rumble. Feels physical and deep at the same time. But there is a feeling in complex songs where the sub-bass does portray a laid-back approach in the mix, but rarely does it. KE4 doesn’t unnecessarily extract/amplify low-end of the songs, it projects them quite naturally and honestly. I would’ve liked a bit more texture from the low-end but it’s unfair to nit-pick because it costs just $199. Overall, it was a quite good experience for me in the Sub-bass section. I enjoyed digitally recorded music with them, and they did a good job of performing the tracks without losing the fun elements.
Music – Hollow (16-Bit Remix)
The bass lines in the song felt full of air and thump. The dual dynamic drivers seem to be working well. The middle part where the mid-bass presence overtook the sub-bass region felt a bit soft, but the sub-bass stayed authoritative throughout the song.
Mid-bass: Mid-bass is not as elevated as the sub-bass, but it still is on the fun side of things. Although the sub-bass to mid-bass transition is quite good for doing justice with the lower-mids, but as an Indian I wanted a bit more mid-bass than the sub-bass if we talk about my personal library. But most of the genres sounded just fine. This is what I think is the weakest section of KE4. The details felt a bit rounded off and the texturing also kept me craving for a bit. Let’s take a few examples to understand the mid-bass of KE4. In Hip-Hop tracks KE4 just felt very natural, as well as the Pop and rock. But in Electronic music, after delivering a wonderful sub-bass authority KE4 falls a bit short in the mid-bass. Contrary to that, the mids get a very natural feeling and don’t encounter any bloat or bleed.
Music – We All Have Dreams
When the bass-drops, where you would expect a bit of authority it feels very Neutral, and it doesn’t pair up with the sub-bass that it has. The vocalist feels extremely well done as the sub-bass.
Is KE4’s Bass Pillowy?
No, it’s not. Let me take 2 IEMs that sounded way Pillowy to me 1. Dunu DaVinci and another one is 2. ThieAudio Hype 4. Compared to them, KE4 is nowhere pillowy and has that authority and thump to call it a better-than-average Bass Experience in my opinion.
MIDRANGE
The mid-range on KE4 is beautiful and took the safest approach in the sense of providing a good balance. To dig deeper let’s jump in the lower mids.
Lower-mids: The lower-mids of KE4 hint a very natural yet full-sounding experience. The male voices do sound natural and not overly elevated or toned down. The timbre of the instruments is very good for the price. (One of the best Timbre I heard under $500). The texturing of the instruments, including vocals, is apt. No artefacts or imperfections I get to notice in this region. I fairly enjoyed the lower mids on this IEM. Although if I must nitpick one thing, it would be the transience nature. The dynamics are excellent but KE4 is not coming out as a fast IEM till this range.
Music: Time Alone with You
In this song, Daniel and Jacob Both sounded very full and textured along with instruments. This track has a special feature where it can reveal any bleed or bloat in the sound, and I am happy to say KE4 passed it with flying colors.
Upper-mids: The upper-mids on KE4 is PHENOMENAL. There is not even a single fault that I can notice in the upper mids. If I have to say something, I have to say that I like elevation in this range a bit more but if I am judging from an average listener's perspective, the treble on KE4 is beautiful. It feels safe where it needs to be, it feels airy where it needs to. The overall projection of neutrality is simply excellent here.
Music: The Raven
Rebecca’s voice sounded airy and extended with getting harsh even a bit. The tonality is very lifelike and neutral. Texturing and details are apt for the price. KE4 never disappointed in the upper mids, even once in my listening sessions.
Treble
The treble on KE4 is well-implemented as well. The first thing that you will notice is the amplitude is very well controlled in the spectrum. It never felt fatiguing nor even a hint dark. In some songs, it might come as a bit of a bright tone, but it’s just there to prevent sound from getting boring. The airiness is ample in the songs. The transient nature is present. Relatively faster speed can be observed here.
All in all, I was quite impressed by the treble as well. With all the intricacies and details, KE4 does provide a middle way to enjoy every type of music.
Music: The Way Up
The cymbals came out detailed, the speed is more than enough for this track. I could’ve used a better attack though; I am not going to lie. But except that there is not many flaws and this comes from a $199 set which is unthinkable to me.
Subjective Sound Quality
Now coming to the subjective side of things this IEM does show its price tag. Well, you can’t have everything at $199 I guess, so they decided to cut corner in a few of the technical/subjective aspects of the sound which I am OK with since I don’t care about them that much to be honest.
Soundstage: Fairly spacious sounding and it can recreate atmosphere well. The bubble is spherical and sometimes it might feel like a single capsule, but I would call it a good sound staging IEM for the price.
Imaging: Imaging is OK. I have seen better imaging at this price. It has that typical stereo stretch more than a holographic/pinpoint precision in music. But in gaming it changes a lot, and I will discuss that at the later stages of the article.
Resolution: The details and resolution of KE4 is just average for the price. It resolves better than Letshouer S12 2024, but it does sometimes remind you of its price tag.
Dynamic Range: KE4 has a very dynamic sound. The fluidity and speed respect each other very well in this IEM.
Timbre: Drums do sound authentic, the low-end seemed a bit blunted but all the other parts are well executed. The violin sounded extremely good. Steel String Guitar sounded OK, but I would’ve liked a bit more crunch and transience to make it sound like real life. Piano sounded very good, it has that earthy weighted tonality, although I would’ve liked a bit more upper-treble elevation. The Saxophone sounded alright, although it is very lifelike and natural.
KE4 IS THE BEST GAMING IEM I TRIED UNDER $500
KE4 had a unique quality, and I almost missed that but fortunately I played “Disco Elysium” before posting the review and I had to include this section.
What do we need in a gaming IEM?
- Lifelike Representation – KE4 is sounded so natural that few things like, glass and wood sounds made me uncomfortable. It sounded lifelike, like I was listening to 8K equivalent to Audio. “Uncharted 4” sounded like I was
- Spacious Representation – KE4 sounded so open in games that it was scary in few games like “Outlast”. Spatial cues are very realistic.
- Neutral Upper Registers – The upper registers are so beautifully tuned that gunshots and firearms never sounded peaky. KE4 is very safe in that case.
- Excellent Midrange – Games like “Batman – Telltale Series” & “Wolf Among Us” so authentic and pulled me in the game unlike any other IEM.
AFUL PERFORMER 5
These two IEMs especially found a good balance between being affordable and being mature in their tonality at the same time. But they do differ a lot even then.
Performer 7 is a braver approach to the sound. By the word brave, I mean it’s a riskier and bolder take on the tonality. Yet, P7 somehow smoothes out the harshness in the music whereas KE4 will give you the truest form of that representation. The upper half on KE4 reminds me of HD600 with a half-worn pad. Where P7 seems like a worthy upgrade to the P5.
The bass is more textured on the P7 with better body. But the physicality of KE4 is a touch better as well as it is more rounded. Resolution is better in P7, but tonality is better in KE4.
Mids are a bit forward on the P7, especially the lower mids. With a bit more texturing and details. But KE4 presents the mids in a very open fashion. The overall range feels like it is open and not on the face like P7 with a good amount of sense of space around the spherical stage and seems more holographic too. It creates such an odd position that half of my library sounds good on P7 (Vocal Centric) and others on KE4 (Instrument Centric).
In the treble KE4 is a total beast. It doesn’t have the same resolution as the P7 but the way it handles treble is extraordinary. It's like neutral but given extra flavours here and there so that it doesn’t seem boring, even with my HRTF this thing just takes the cake for natural sound. P7 is a safer approach where the treble is smooth and reminiscent of AFUL house sound & not to mention the 10khz dip in my HRTF which makes the sound even smoother.
Although both IEMs are exceptionally good for their price and punch way above their price tag, it’s up to you to choose your flavour. Do you want a natural sound or a bit coloured?
JM1-DF BASED IEMs Ranked According to me: (In terms of my personal preference)
(Top is better)
- ThieAudio Monarch MKII
- Hisenior Mega5EST
- Kiwi Ears KE4
- ThieAudio Hype 4
- Dunu DaVinci
Conclusion
I wholeheartedly recommend Kiwi Ears KE4. Not only at its price point but it can confidently compete with IEMs under $400. But the only thing you need to consider if you love raw music itself or not, because you can’t magically make your music sound good with this IEM not it will extract inaccuracies to give you a microscopic view of your music.
And lastly if you are looking for a Gaming IEM, please don’t look further and pull the trigger.
ILuvAudio
Bro, very good
Argha
Thanks A Lot Brother
After reading a lot about the KE4 and its insane price/performance value, i had to test it, and so i did.
Especially that it is supposed to sound very balanced got me interested as i am a big fan of Neutral/Balanced/Flat. I like it when everything is in harmony and nothing stands out too much. I want to be as close to the original recording as possible.
My reference is the Neumann KH 120 II Studio Reference Monitor Speaker. I think this is pretty much the most balanced/natural/flat speaker you can get on this planet. My pair is calibrated using the calibration Mic from Neumann.
As it is unfair to compare IEM against speakers, i also used Studio Reference IEM for comparison (Like the Vision Ears VE7 or the FitEar MH334 Studio Reference).
No matter if i use the Speakers or the IEM as comparison, the KE4 does not sound balanced, not even close. Its an rather "cold" sound with quite an nice amount of sub bass, but everything after the sub bass is just a giant gap until the upper mids where there is an rather strong push.
To my ears, its a typical consumer earphone tuning and nothing i would expect from something called balanced.
When i listened to the KE4 for a few songs and then go back to the speakers, the Neumann sounds insanely muffled and dark to a point where i started to question if i did something wrong and used the calibration mic to check, but no, everything is fine, they are perfectly flat. So its not the Neumann that sound muffled/dark, its the KE4 that sounds cold/bright.
Sadly this does have a negative influence on the balance of a lot of songs. Especially instruments like double bass sound way too low in volume while percussion instruments, especially snare drums of drum kits are way too loud. You can hear that especially in songs with lots of acoustical instruments. Its a very "Modern/Pop" Tuning. So songs that mostly consist of Bass and Vocals do shine with the KE4 and give an very fun impression.
When you have a Violin that plays in the upper range, you have insane detail and clarity, but as soon the violin goes in the lower ranges, it starts to sound very compressed and lifeless where it has an very natural/acoustic sound on the Neumann.
Again, because an comparison against speakers is unfair, i used my Studio Reference IEM but its the identical result. Where the Violin sounds harmonic and balanced on the other IEM, the KE4 gives an overly detailed/cold impression.
There are some songs where this tuning is just right and gives you a smile. they are very fun sounding but you can not crank the volume too much. Especially the push in the upper mids and the treble overall cause vocals to get painful very fast.
Also the bass can be too much with quite some songs. I am not a bass head, as said, i like balanced/flat, but this IEM has an surprisingly strong bass, that you can't really enjoy because its a rather cold tuning so you can not crank the volume high enough to really enjoy it.
Especially with Pop Songs, you are heavily limited in volume. Best example is Party Maker from Perfume. I listened to the Live Version from their current BluRay and with my Studio Reference Setups i can listen easily at the double volume without anything being unpleasant or harsh. The same is true with BiSH. With the KE4, you have to be careful as sounds in the female vocal region start to get unpleasant or even painful very fast. Especially with Party Maker from Perfume, the vocals also started to sound "harsh" and just unnatural and the synth snare sound effect in the background was very annoying being way to loud.
The same happens with a lot of other music. Pop performs best but music that is mixed/mastered very balanced has the biggest hit. You have single instruments that are just way too forward, especially percussion instruments, especially the above mentioned snare drum. There are some songs i can just not listen too because the snare drum cuts like a knife through the sound wall like directly into your eardrum. Especially with Metal it gets painful very fast. There are some bands, i can just not listen to with the KE4 as the snare drum feels like the drum stick is directly on my eardrum.
I understand some people enjoying this "Its inside my eardrum" clarity sensation, but it gets fatiguing very fast and at least for me, with a lot of bands, throws off the balance so hard, that i can no longer enjoy listening to them.
And this is my biggest critic point of this In-Ear. For an In-Ear that obviously is designed for modern music and to sound fun, right when it starts to get fun, it gets painful.
The price point is rather cheap, that is true, especially for the build quality, but there are a lot of similar tuned In-Ear for the same price or even cheaper that have better isolation and, at least for me, are more comfortable, but don't look as nice and don't come with such an nice packaging.
I can wear other In-Ear and IEM easily for 8+ hours (I worn the SE846 on an 12 hour flight and the Westone Mach 80 on an 14 hour flight without any issues), the KE4 not. They start to get unpleasant very fast even though they are not that large, due to the rather large nozzle. But that is something very personal everyone will experience differently.
For the price, its not bad, not at all, but i don't get the hype. I tested these using the shipped earpieces to see how they sound with these, but used the COMPLY TRZ for half of the time as i test all my IEM with COMPLY and also they are much more comfortable than anything shipped with the IEM. But the shipped earpieces where fine, no real issues there either
Long Story Short: To me they sound like other average consumer In-Ear in that price range and there are, for the same price, options that sound much more balanced and/or neutral/natural for less money In-Ear that are way more comfortable/smaller and have much stronger isolation. I was really negatively surprised on how bad the KE4 isolated based on their design as they look like IEM.
If you like their sound, the japanese call it don-shari (which roughly translates to badum tsss) its an very good offer with a very nice cable/box/presentation, cool design but if you're looking for something balanced, i would absolutely not consider this In-Ear.
Kiwi Markets/Sells this as an IEM (In-Ear Monitor) but due to the poor isolation an unbalanced sound, i would never ever use it as an Monitor, so for me, i do not understand how this is supposed to be an IEM, its just a normal In-Ear that resembles IEM with its look, but it stops there.
So with 3.5/5 i rate it at average. If they would have marketed it as an fun tuning for pop, i would rate it higher. But as they market it as an balanced/natural sound, they fail to provide that. Not sure what reference was used, but certainly not balanced/flat studio reference speakers/IEM
Especially that it is supposed to sound very balanced got me interested as i am a big fan of Neutral/Balanced/Flat. I like it when everything is in harmony and nothing stands out too much. I want to be as close to the original recording as possible.
My reference is the Neumann KH 120 II Studio Reference Monitor Speaker. I think this is pretty much the most balanced/natural/flat speaker you can get on this planet. My pair is calibrated using the calibration Mic from Neumann.
As it is unfair to compare IEM against speakers, i also used Studio Reference IEM for comparison (Like the Vision Ears VE7 or the FitEar MH334 Studio Reference).
No matter if i use the Speakers or the IEM as comparison, the KE4 does not sound balanced, not even close. Its an rather "cold" sound with quite an nice amount of sub bass, but everything after the sub bass is just a giant gap until the upper mids where there is an rather strong push.
To my ears, its a typical consumer earphone tuning and nothing i would expect from something called balanced.
When i listened to the KE4 for a few songs and then go back to the speakers, the Neumann sounds insanely muffled and dark to a point where i started to question if i did something wrong and used the calibration mic to check, but no, everything is fine, they are perfectly flat. So its not the Neumann that sound muffled/dark, its the KE4 that sounds cold/bright.
Sadly this does have a negative influence on the balance of a lot of songs. Especially instruments like double bass sound way too low in volume while percussion instruments, especially snare drums of drum kits are way too loud. You can hear that especially in songs with lots of acoustical instruments. Its a very "Modern/Pop" Tuning. So songs that mostly consist of Bass and Vocals do shine with the KE4 and give an very fun impression.
When you have a Violin that plays in the upper range, you have insane detail and clarity, but as soon the violin goes in the lower ranges, it starts to sound very compressed and lifeless where it has an very natural/acoustic sound on the Neumann.
Again, because an comparison against speakers is unfair, i used my Studio Reference IEM but its the identical result. Where the Violin sounds harmonic and balanced on the other IEM, the KE4 gives an overly detailed/cold impression.
There are some songs where this tuning is just right and gives you a smile. they are very fun sounding but you can not crank the volume too much. Especially the push in the upper mids and the treble overall cause vocals to get painful very fast.
Also the bass can be too much with quite some songs. I am not a bass head, as said, i like balanced/flat, but this IEM has an surprisingly strong bass, that you can't really enjoy because its a rather cold tuning so you can not crank the volume high enough to really enjoy it.
Especially with Pop Songs, you are heavily limited in volume. Best example is Party Maker from Perfume. I listened to the Live Version from their current BluRay and with my Studio Reference Setups i can listen easily at the double volume without anything being unpleasant or harsh. The same is true with BiSH. With the KE4, you have to be careful as sounds in the female vocal region start to get unpleasant or even painful very fast. Especially with Party Maker from Perfume, the vocals also started to sound "harsh" and just unnatural and the synth snare sound effect in the background was very annoying being way to loud.
The same happens with a lot of other music. Pop performs best but music that is mixed/mastered very balanced has the biggest hit. You have single instruments that are just way too forward, especially percussion instruments, especially the above mentioned snare drum. There are some songs i can just not listen too because the snare drum cuts like a knife through the sound wall like directly into your eardrum. Especially with Metal it gets painful very fast. There are some bands, i can just not listen to with the KE4 as the snare drum feels like the drum stick is directly on my eardrum.
I understand some people enjoying this "Its inside my eardrum" clarity sensation, but it gets fatiguing very fast and at least for me, with a lot of bands, throws off the balance so hard, that i can no longer enjoy listening to them.
And this is my biggest critic point of this In-Ear. For an In-Ear that obviously is designed for modern music and to sound fun, right when it starts to get fun, it gets painful.
The price point is rather cheap, that is true, especially for the build quality, but there are a lot of similar tuned In-Ear for the same price or even cheaper that have better isolation and, at least for me, are more comfortable, but don't look as nice and don't come with such an nice packaging.
I can wear other In-Ear and IEM easily for 8+ hours (I worn the SE846 on an 12 hour flight and the Westone Mach 80 on an 14 hour flight without any issues), the KE4 not. They start to get unpleasant very fast even though they are not that large, due to the rather large nozzle. But that is something very personal everyone will experience differently.
For the price, its not bad, not at all, but i don't get the hype. I tested these using the shipped earpieces to see how they sound with these, but used the COMPLY TRZ for half of the time as i test all my IEM with COMPLY and also they are much more comfortable than anything shipped with the IEM. But the shipped earpieces where fine, no real issues there either
Long Story Short: To me they sound like other average consumer In-Ear in that price range and there are, for the same price, options that sound much more balanced and/or neutral/natural for less money In-Ear that are way more comfortable/smaller and have much stronger isolation. I was really negatively surprised on how bad the KE4 isolated based on their design as they look like IEM.
If you like their sound, the japanese call it don-shari (which roughly translates to badum tsss) its an very good offer with a very nice cable/box/presentation, cool design but if you're looking for something balanced, i would absolutely not consider this In-Ear.
Kiwi Markets/Sells this as an IEM (In-Ear Monitor) but due to the poor isolation an unbalanced sound, i would never ever use it as an Monitor, so for me, i do not understand how this is supposed to be an IEM, its just a normal In-Ear that resembles IEM with its look, but it stops there.
So with 3.5/5 i rate it at average. If they would have marketed it as an fun tuning for pop, i would rate it higher. But as they market it as an balanced/natural sound, they fail to provide that. Not sure what reference was used, but certainly not balanced/flat studio reference speakers/IEM
Vamp898
@anli Due to being to long (sorry), my reply is here^^ https://ignaz.org/nextcloud/index.php/s/iqNQjKKLpXzDTy7
And of course, thank you for your feedback!
And of course, thank you for your feedback!
Kiwi Ears KE4
2DD + 2BA
$199
Before I begin this review, let me thank Linsoul for sending the IEM in for review.
Rest assured, as always my review is 100% my own personal opinion.
You can get it here : https://www.linsoul.com/products/kiwi-ears-ke4
Unboxing
Inside the box :
Build Quality
The IEM itself is made from resin, very light weight, the design is very minimalist and the shape is ergonomic. This is definitely one of the most comfortable IEM to wear for extended listening sessions.
As for the cable itself, KE4 uses a traditional 2 pin connector, the included cable quality is good, but sadly it terminates in 3.5mm, and I believe there is no option to choose 4.4mm balanced on the web store.
Sound
Tested using FIIO KB3, Poco M6 Pro, stock cable, stock eartips
Music is mostly from Apple Music (J-POP, EDM, Jazz, Rap, Metal)
Tonality in general : Balanced
Overall tonality of the KE4 is like a modified Harman target curved
Bass : Focused more on the sub-bass, though mid-bass also has a small boost.
The bass quantity is more or less the same as your typical harman target IEM, but the quality is very good.
I really like how the KE4 presents the bass. It hits quite deep and hard, also the rumble of the bass is very rich in texture, very good sounding bass, thanks to the isobaric design of the dynamic driver used on the IEM.
Midrange : Neutral, transparent, honest, that’s what I would describe the KE4 midrange.
The midrange placement is also not very forward like your typical Harman target tuned IEM because the KE4 has less upper midrange boost compared to true Harman.
The timbre of this IEM is very good, I have 0 complaints.
Things just sound correct, 0 shouty, 0 sibilance, not thin, not thick, it's just right.
One thing I should mention, if you’re used to let's say thicker sounding IEM, at first you will find the KE4 to be a bit lean sounding, but to be honest, the midrange is just dead neutral.
Treble : Smooth and well extended.
The KE4 treble tuning is just spot on, it's well extended and has lots of details and on top of that it is rendered in a smooth presentation.
For its asking price, this treble tuning is just spectacular.
Technicalities
Very good for 200$
Stage : Medium sized, very well textured stage layering, symmetrical in width and depth
Detail Retrieval : Very good
The KE4 detail retrieval can easily be compared to IEM such as Blessing 3 which cost $100 more and even that, I still think that the KE4 has better detail retrieval than Blessing 3.
Separation and Positioning : Very good
Tested on music and gaming, the KE4 performed very well in this aspect.
I have no issues at all separating and locating sound sources both on gaming or music listening.
Comparison
Moondrop Blessing 3
2DD+4BA
$300
The Blessing 3 has superior unboxing experience, accessories and looks cooler compared to the KE4.
That’s the only good thing about it.
Sound wise, I can easily recommend the KE4 more than the Blessing 3, both tonally and technicality, the KE4 is just superior in both aspects.
Unless you really want the waifu box, I recommend you to get the KE4 instead of Blessing 3.
Conclusion
Is the Kiwi Ears KE4 any good?
Would I Recommend the KE4?
The answer is YES and YES.
I can easily recommend the KE4, probably the easiest IEM recommendation of 2024 for me.
The asking price for what you get is basically a steal deal.
For $200 USD, you get a very well tuned IEM, with technicality that can easily punch above its asking price.
The only thing I wish for the KE4 is for Kiwi Ears to add 4.4mm or modular cable options.
That’s all from me for now.
Thanks for reaching this far !
You can watch the video review of this IEM here
-littlenezt.
2DD + 2BA
$199
Before I begin this review, let me thank Linsoul for sending the IEM in for review.
Rest assured, as always my review is 100% my own personal opinion.
You can get it here : https://www.linsoul.com/products/kiwi-ears-ke4
Unboxing
- IEM
- Cable
- Pouch
- Manual
- Eartips
- Spare Filters
Build Quality
The IEM itself is made from resin, very light weight, the design is very minimalist and the shape is ergonomic. This is definitely one of the most comfortable IEM to wear for extended listening sessions.
As for the cable itself, KE4 uses a traditional 2 pin connector, the included cable quality is good, but sadly it terminates in 3.5mm, and I believe there is no option to choose 4.4mm balanced on the web store.
Sound
Tested using FIIO KB3, Poco M6 Pro, stock cable, stock eartips
Music is mostly from Apple Music (J-POP, EDM, Jazz, Rap, Metal)
Tonality in general : Balanced
Overall tonality of the KE4 is like a modified Harman target curved
Bass : Focused more on the sub-bass, though mid-bass also has a small boost.
The bass quantity is more or less the same as your typical harman target IEM, but the quality is very good.
I really like how the KE4 presents the bass. It hits quite deep and hard, also the rumble of the bass is very rich in texture, very good sounding bass, thanks to the isobaric design of the dynamic driver used on the IEM.
Midrange : Neutral, transparent, honest, that’s what I would describe the KE4 midrange.
The midrange placement is also not very forward like your typical Harman target tuned IEM because the KE4 has less upper midrange boost compared to true Harman.
The timbre of this IEM is very good, I have 0 complaints.
Things just sound correct, 0 shouty, 0 sibilance, not thin, not thick, it's just right.
One thing I should mention, if you’re used to let's say thicker sounding IEM, at first you will find the KE4 to be a bit lean sounding, but to be honest, the midrange is just dead neutral.
Treble : Smooth and well extended.
The KE4 treble tuning is just spot on, it's well extended and has lots of details and on top of that it is rendered in a smooth presentation.
For its asking price, this treble tuning is just spectacular.
Technicalities
Very good for 200$
Stage : Medium sized, very well textured stage layering, symmetrical in width and depth
Detail Retrieval : Very good
The KE4 detail retrieval can easily be compared to IEM such as Blessing 3 which cost $100 more and even that, I still think that the KE4 has better detail retrieval than Blessing 3.
Separation and Positioning : Very good
Tested on music and gaming, the KE4 performed very well in this aspect.
I have no issues at all separating and locating sound sources both on gaming or music listening.
Comparison
Moondrop Blessing 3
2DD+4BA
$300
The Blessing 3 has superior unboxing experience, accessories and looks cooler compared to the KE4.
That’s the only good thing about it.
Sound wise, I can easily recommend the KE4 more than the Blessing 3, both tonally and technicality, the KE4 is just superior in both aspects.
Unless you really want the waifu box, I recommend you to get the KE4 instead of Blessing 3.
Conclusion
Is the Kiwi Ears KE4 any good?
Would I Recommend the KE4?
The answer is YES and YES.
I can easily recommend the KE4, probably the easiest IEM recommendation of 2024 for me.
The asking price for what you get is basically a steal deal.
For $200 USD, you get a very well tuned IEM, with technicality that can easily punch above its asking price.
The only thing I wish for the KE4 is for Kiwi Ears to add 4.4mm or modular cable options.
That’s all from me for now.
Thanks for reaching this far !
You can watch the video review of this IEM here
-littlenezt.
Kiwi Ears KE4
Does the KE stand for Kiwi Ears? Are these the Kiwi Ears Kiwi Ears 4???
If you dont' like reading, here's a video version of this review
Disclaimer & Introduction
Kiwi Ears offered me a KE4 in exchange for my opinions.
At around 187 EUR, I will mostly be comparing the KE4 with the Orchestra Lite at 235 EUR, but further comparisons with other brands will come later.
Unboxing and Accessories
As usual, Kiwi Ears opts for an almost spartan unboxing experience and a very limited range of accessories.
Included are three sets of silicone tips, the usual Kiwi Ears carry case and two sets of replacement nozzle dust filters.
Build, Design & Ergonomics
The overall shape and size of the KE4 is quite similar to the Orchestra Lite, however it is not exactly the same shape, and unlike the Orchestra Lite which has a moulded nozzle as part of the resin housing, the KE4 has a fitted metal nozzle, which measures at just under 6mm.
The nozzles are both the same length, however tips on the Orchestra Lite can slide further up the nozzle due to there being no fitted shape.
This means that technically, the KE4 nozzles end up feeling longer, which didn’t cause any discomfort for me, but the KE4 didn’t quite fit as well as the Orchestra Lite in my ears, with tiny gaps between the entire housing and my ears which I think makes external wind noise slightly more noticeable.
The 2nd biggest difference is the weight.
The Orchestra Lite shell is a hefty 7.8g, while the KE4 is relatively featherweight 5g.
For some context, the heaviest IEM I have is the Simgot EA1000 at 11.1g and the lightest is the Final Audio E4000 at 1.5g.
The resin housings have a very dark pigment, but with a strong light, you can just about make out some of the hardware inside.
The two BA drivers are quite easy to pick out, as they’re in the thinner nozzle area, and if you’ve got some patience, you might notice the two dynamic drivers that appear to be facing directly towards each other and partially sealed together around their circumference.
The other big difference is that these shells are appropriately vented, so wearing comfort is all but guaranteed.
Finally onto the cable...
It’s not great.
First thing out of the box, I was assaulted by a strong chemical smell which persists after a week if I cup the cable in my hands and give it a sniff.
Fortunately after 2-3 weeks the smell completely disappeared.
On the whole it’s also quite prone to tangling as it’s relatively thin, and doesn’t use an extra sheath after the Y-split like some other brands have done.
Also the Y-split metal part is excessively heavy and only adds to the tangle potential.
If this was my only IEM, I would seriously consider replacing the cable.
Finally, the two pin inner housing part protrudes slightly and doesn’t fit into a recess in the shells (because there isn't one).
This isn’t a big deal as other brands do this as they’re mix and matching different parts that aren’t always a perfect fit, and it doesn’t really affect anything negatively.
The Sound
After a few weeks with the KE4, my final feelings on the overall sound presentation and quality is that of a smooth, monitoring IEM.
Let me explain...
(measured with miniDSP EARS - treble result is unreliable and quite strongly over-emphasized here - it's closer to neutral)
As most of you know, this IEM falls into the category of the current ‘meta-tuning’, the frequency response that falls very close to the global average and should at least satisfy the most ears and tastes.
For one thing I do agree.
It has a healthy sub-bass response and just about shies away from being too energetic in the upper midrange, barely avoiding the dreaded pinna-gain.
But you probably know all that already… that’s the boring part.
The imaging is exceptionally good putting sounds in FPS games in exactly the correct places in all directions.
It does make some sacrifices in soundstage to achieve this.
The sound is more on the intimate side and doesn’t appear to leave the head-space, but the stereo accuracy you get in exchange for that, alone becomes an extremely compelling argument for it’s asking price.
Overall the sound is bassy neutral, with what sounds like a tiny midrange-scoop.
Bass timbre is thumpier than it is dry or accurate, so it’s more tuned to being fun and bottomless, like the lower-end subwoofer’ish JVC HA-FXZ200 sound of old.
Speaking of which, just like the JVC, the KE4 also can take quite a lot of bass boosting, without seriously distorting.
Whether it still sounds tasteful is of course another matter
The midrange is more dry and clear than it is full or lush, with slight emphasis on upper mids.
Treble is also pretty much neutral and doesn’t appear to steer into being too splashy or too piercing, and neither too distanced or recessed, but is just missing a smidge of air and naturalness.
There is something ever so slightly muted or dull about the treble, but it doesn’t appear to sound like the typical flawed BA-timbre that you might find creeping into the Simgot EM6L for example.
Between the two, looking at this graph alone, you might think to save the 80 Euros and go for the Simgot, and for some of you, that could be a very real option.
Personally regarding the sound, I prefer the KE4.
Not only are the KE4’s ergonomics and comfort significantly better than the EM6L for my ears, but side by side, the KE4 sound is more neutral and natural.
There is an argument to be made here for anyone looking for a direct upgrade from the EM6L.
Comparing directly between the two, the EM6L’s slight sheen in the upper mids and slightly weaker sub-bass presentation makes it appear to sound more detailed and have better separation, but the reality is that they’re about on the same level of detail, with the KE4 only slightly edging out into the lead, but the KE4 takes another bigger step forward with superior separation overall.
Conclusions
The KE4 has been priced extremely carefully.
It seems Kiwi Ears has given very serious thought about this and paid very close attention to exactly where it should fit in the market according to it’s many strengths and few shortcomings, compared to the competition.
This is truly one of those times where I can say the price quite strongly reflects the market position, and there are going to be people who will gladly take the excellent imaging and tuning over something like the Kiwi Ears Orchestra Lite or Simgot EA1000, which aren’t as strong in the imaging, but have bigger staging and a more ‘musical’ performance.
If you are one such person, just save some money and make the safe bet.
These are, quite possibly the most middle-of-the-road IEMs I’ve heard to date. The least inoffensive.
They don’t excel anywhere in particular aside from the inoffensive tuning, but most importantly, neither do they exhibit any quirks or severe drawbacks.
Does the KE stand for Kiwi Ears? Are these the Kiwi Ears Kiwi Ears 4???
If you dont' like reading, here's a video version of this review
Disclaimer & Introduction
Kiwi Ears offered me a KE4 in exchange for my opinions.
At around 187 EUR, I will mostly be comparing the KE4 with the Orchestra Lite at 235 EUR, but further comparisons with other brands will come later.
Unboxing and Accessories
As usual, Kiwi Ears opts for an almost spartan unboxing experience and a very limited range of accessories.
Included are three sets of silicone tips, the usual Kiwi Ears carry case and two sets of replacement nozzle dust filters.
 |  |  |
 |  |  |
Build, Design & Ergonomics
The overall shape and size of the KE4 is quite similar to the Orchestra Lite, however it is not exactly the same shape, and unlike the Orchestra Lite which has a moulded nozzle as part of the resin housing, the KE4 has a fitted metal nozzle, which measures at just under 6mm.
The nozzles are both the same length, however tips on the Orchestra Lite can slide further up the nozzle due to there being no fitted shape.
This means that technically, the KE4 nozzles end up feeling longer, which didn’t cause any discomfort for me, but the KE4 didn’t quite fit as well as the Orchestra Lite in my ears, with tiny gaps between the entire housing and my ears which I think makes external wind noise slightly more noticeable.
The 2nd biggest difference is the weight.
The Orchestra Lite shell is a hefty 7.8g, while the KE4 is relatively featherweight 5g.
For some context, the heaviest IEM I have is the Simgot EA1000 at 11.1g and the lightest is the Final Audio E4000 at 1.5g.
The resin housings have a very dark pigment, but with a strong light, you can just about make out some of the hardware inside.
The two BA drivers are quite easy to pick out, as they’re in the thinner nozzle area, and if you’ve got some patience, you might notice the two dynamic drivers that appear to be facing directly towards each other and partially sealed together around their circumference.
The other big difference is that these shells are appropriately vented, so wearing comfort is all but guaranteed.
Finally onto the cable...
It’s not great.
 |  |  |
First thing out of the box, I was assaulted by a strong chemical smell which persists after a week if I cup the cable in my hands and give it a sniff.
Fortunately after 2-3 weeks the smell completely disappeared.
On the whole it’s also quite prone to tangling as it’s relatively thin, and doesn’t use an extra sheath after the Y-split like some other brands have done.
Also the Y-split metal part is excessively heavy and only adds to the tangle potential.
If this was my only IEM, I would seriously consider replacing the cable.
Finally, the two pin inner housing part protrudes slightly and doesn’t fit into a recess in the shells (because there isn't one).
This isn’t a big deal as other brands do this as they’re mix and matching different parts that aren’t always a perfect fit, and it doesn’t really affect anything negatively.
The Sound
After a few weeks with the KE4, my final feelings on the overall sound presentation and quality is that of a smooth, monitoring IEM.
Let me explain...
(measured with miniDSP EARS - treble result is unreliable and quite strongly over-emphasized here - it's closer to neutral)
As most of you know, this IEM falls into the category of the current ‘meta-tuning’, the frequency response that falls very close to the global average and should at least satisfy the most ears and tastes.
For one thing I do agree.
It has a healthy sub-bass response and just about shies away from being too energetic in the upper midrange, barely avoiding the dreaded pinna-gain.
But you probably know all that already… that’s the boring part.
The imaging is exceptionally good putting sounds in FPS games in exactly the correct places in all directions.
It does make some sacrifices in soundstage to achieve this.
The sound is more on the intimate side and doesn’t appear to leave the head-space, but the stereo accuracy you get in exchange for that, alone becomes an extremely compelling argument for it’s asking price.
Overall the sound is bassy neutral, with what sounds like a tiny midrange-scoop.
Bass timbre is thumpier than it is dry or accurate, so it’s more tuned to being fun and bottomless, like the lower-end subwoofer’ish JVC HA-FXZ200 sound of old.
Speaking of which, just like the JVC, the KE4 also can take quite a lot of bass boosting, without seriously distorting.
Whether it still sounds tasteful is of course another matter
The midrange is more dry and clear than it is full or lush, with slight emphasis on upper mids.
Treble is also pretty much neutral and doesn’t appear to steer into being too splashy or too piercing, and neither too distanced or recessed, but is just missing a smidge of air and naturalness.
There is something ever so slightly muted or dull about the treble, but it doesn’t appear to sound like the typical flawed BA-timbre that you might find creeping into the Simgot EM6L for example.
Between the two, looking at this graph alone, you might think to save the 80 Euros and go for the Simgot, and for some of you, that could be a very real option.
Personally regarding the sound, I prefer the KE4.
Not only are the KE4’s ergonomics and comfort significantly better than the EM6L for my ears, but side by side, the KE4 sound is more neutral and natural.
There is an argument to be made here for anyone looking for a direct upgrade from the EM6L.
Comparing directly between the two, the EM6L’s slight sheen in the upper mids and slightly weaker sub-bass presentation makes it appear to sound more detailed and have better separation, but the reality is that they’re about on the same level of detail, with the KE4 only slightly edging out into the lead, but the KE4 takes another bigger step forward with superior separation overall.
Conclusions
The KE4 has been priced extremely carefully.
It seems Kiwi Ears has given very serious thought about this and paid very close attention to exactly where it should fit in the market according to it’s many strengths and few shortcomings, compared to the competition.
This is truly one of those times where I can say the price quite strongly reflects the market position, and there are going to be people who will gladly take the excellent imaging and tuning over something like the Kiwi Ears Orchestra Lite or Simgot EA1000, which aren’t as strong in the imaging, but have bigger staging and a more ‘musical’ performance.
If you are one such person, just save some money and make the safe bet.
These are, quite possibly the most middle-of-the-road IEMs I’ve heard to date. The least inoffensive.
They don’t excel anywhere in particular aside from the inoffensive tuning, but most importantly, neither do they exhibit any quirks or severe drawbacks.
.
The upper treble of the Kiwi Ears KE4 (199 USD) sounds like the upper treble from a set that cost 1,399 USD that uses EST drivers, and the voicing or the tuning has a BBC curve or dip, which was pioneered in the 60's by British Broadcasting Corporation for their speakers. I will touch on this later, but first I'd like to thank Kiwi Ears for sending me the KE4 for a review. Thank you, Kiwi Ears.
.
Kiwi Ears is an audio company that sells mostly in ear monitors; they also have dongleDAC/amps, which are available at their website as well as other audio store sites. They have been releasing very good and popular IEMs in the market, one over another, and the Kiwi Ears KE4 is no exception.
.
The packaging (see photo) is simple and effective; it included a nice hard case, a nice cable, three pairs of eartips that have a wheel near the opening, a manual, and surprisingly, two extra pairs of nozzle grill.
.
The build quality and finish are very good, as I didn't see any scratches on the finish of its medium-sized resin shell. The nozzle is metal with a width of 5.9 mm, which is average in size. It feels light on the ears and very comfortable to wear.
.
Driver configuration:
.
The Kiwi Ears KE4 features two 10mm dynamic drivers for bass, midrange, and lower treble, and two balance armature drivers for the upper treble on each side. The two dynamic drivers were arranged in an isobaric configuration; they are arranged in a way that the two drivers are in tandem with each other, where one is firing to the nozzle and the other is firing to the faceplate. This configuration makes the driver act as if it has twice the moving mass, twice the power consumption, but with a single radiating area. The advantage of this configuration is that it reduces the volume requirement at the rear chamber into half, or it lowers the resonance frequency of the bass tuning when compared with the same volume as a single driver's. The disadvantage is the reduced efficiency, which is fortunately negligible in the case of the KE4.
.
The tuning:
.
I didn't know what to expect as I refrained from watching or reading any reviews of the KE4 before reviewing it myself to not contaminate my own opinions about it. But I've read some people were commenting about its new JM1 and Meta tuning. I have no idea what those were, but when I saw the normalized graph by Crinacle, aside from the obvious subbass boost, what stood out to me was the slight dip in response between 1 and 4 KHz. Being a DIY speaker builder myself since I was in high school, it reminded me so much of the tuning technique in the speaker design world, called the BBC curve or dip, which was pioneered in the 60's by British Broadcasting Corporation. The reason for that was to make the sound more pleasing to most people, as most people (excluding me) find a speaker with a flat midrange response annoying, fatiguing, and unnatural to listen to. And also because some of the woofers on the monitoring speakers made by BBC during that era have a rise in response off their front axis, so they have to reduce the response around the crossover region, resulting in a dip in the on-axis response. I never forgot the sound of this kind of tuning when I listened at a showroom of an audio store of a British speaker (Rogers IIRC) that was known to have this tuning. It was very pleasing to listen to; there was no shoutiness in the upper midrange; it was very smooth. I think it is very similar to the JM1 or meta tuning in the IEM world. I wish it happened sooner in the IEM world so some people wouldn't have suffered from the aggression in the midrange of the popular Harman tuning.
.
Burn-in:
.
I know some people don't believe in IEM burn-in, and I agree that they are entitled to their own beliefs; you may skip this section. But this is my review and my experience with the Kiwi Ears KE4. I found out that the KE4 needs more burn-in time than most IEMs. The burn-in method that I used is to play low volume of music in the first 24 hours and then gradually increase the volume in the succeeding 24 hours. I monitored the progress from time to time, and after the first 24 hours, the sound was good but I felt the treble was too polite, so I changed the eartips to brighter sounding ones and then posted my first listening impressions with that set up, but after a few days I noticed the sound was too bright, so I reverted back to the stock tips, and the sound was perfectly balanced. I kept monitoring the burn-in progress and stopped the burn-in process at around 200 hours, but in hindsight, I think it was totally burnt-in at 150 hours. Sorry for the long explanation about the burn-in process; you don't have to do this; you can just use the IEM cassually, and it will naturally burn-in in time, but this is a review, so I have to do this to achieve the best possible sound prior to the review. For me, the Kiwi Ears KE4 became much more refined sounding after the burn-in and sounds like a different and more expensive IEM.
.
I also noticed before the burn-in, the KE4 needed more power to make it come alive and must be driven with powerful sources, but after the burn-in, I can use any of my dongle DACs, even the smallest ones with the fixed USB connectors, and it sounds alive and musical. Though it still benefits a lot with a powerful source or an expensive source with matching sound quality like my iBasso DC Elite.
.
Sensitivity, power handling, and amplifier pairing:
.
The sensitivity is average, which is good. The power handling is very good, as I can crank the volume up while the KE4 remains clean. And when it comes to amplifier pairings, the KE4 is not fuzzy about it; due to its pleasing sounding tuning, it tends to be very versatile and forgiving with source matching. I can use my tiny 3.5mm dongle DAC and enjoy very good sound quality, but even so, the KE4 can scale up very easily and benefits a lot when paired with very good-sounding and expensive sources.
.
Tonality and sound signature:
.
I am very tolerant to different kinds of tunings and have a wide palette when it comes to sound signatures that I like. If I have to rate the tuning of the KE4 in one word, I would rate it "excellent" in the way it was executed; it sounds warm but not too dark; it is warm U-shaped in sound signature but quite energetic; the subbass is boosted and ever present; the midrange is slightly warm and lush; the treble is sweet and smooth; and the upper treble is very refined sounding and very extended, as if it were limitless in its extension. There is no shout, glare, or unnatural forwardness in the upper midrange. It sounds very pleasing and fun at the same time.
.
Technicalities:
.
The soundstage is big, the imaging is good, the detailing is good, the separation is good, and the layering is also good. But the overall presentation favors the soundstage size more than the others. The soundstage shape is mostly deeper than wider but could be made equally wide as it is deep when it is paired with a source that has a wide soundstage, like the iBasso DC Elite, among others. I have compared the KE4 to other sets that have more details, imaging, and separation and noticed that all those are in the KE4 but were presented in a laid-back manner; for example, the details won't call attention to themselves too much like the others do, as it presents the whole instrument more than mere details, like in live musical performances, but even so, the immaculately extended upper treble of the KE4 prevented any instruments from sounding rolled off or dull. The KE4 is more of a musical IEM than a technical one, even though it has a lot of the latter too. Simply beautiful sounding, I might add.
.
Bass:
.
It is subbass focused and has an ever-looming presence on the music or movies, adding that very wanted tension, emotion, weight, thickness, and depth to the sound. It may not be the tightest bass I've heard but has good enough details and speed for me not to be bothered. This is one of the best subbass-focused styles of bass I've heard; it is nicely done and nicely tuned. There is not a doubt in my mind that this is the result of the isobaric driver arrangement of its two 10mm dynamic drivers for each side. I'm very pleased with the bass.
.
Midrange:
.
Warm, lush, laid back, and non-fatiguing. The clarity and details are good, but the overall presentation is on the musical side rather than the analytical side, due to its lush sound. It also has good energy, which prevents it from sounding lethargic. Very nice sounding midrange.
.
Treble:
.
The details in the lower treble are moderate, but when I listened intently, I found all the details were there, albeit presented in a laidback way; it is very smooth and slightly laidback, with absolutely no sharpness or harshness. The upper treble is amazing; it sounds so refined, exquisite, and polished, provided, of course, you use an excellent sounding source like the iBasso DC Elite or something similar. It is so smooth and detailed that it sounds very similar to the upper treble of the 1,399-USD Hiby Zeta IEM that uses EST drivers in the upper treble. The lower treble is very good and the upper treble is fantastic.
.
I'd like to add that the integration of the drivers is seamless; I almost forgot that I'm listening to a hybrid set.
.
Compared to Hidizs MP145 (150 USD):
.
The Hidizs MP145 is a very popular planar IEM in the audio community due to its shockingly good sound quality that matches, if not exceeds, other more expensive IEMs that came out before it. Compared to the Kiwi Ears KE4, they have somewhat similar sound signatures but sound different due to their driver configurations. They have similar warm sound, but the bass on the KE4 is much deeper and more powerful, and the decay is much longer on the, while dryer on the MP145. The midrange is similarly lush sounding, but the midrange on the MP145 is more recessed or laid back. The treble between the two has different textures; both are slightly laid back and similarly detailed, but the MP145 has a sweet-sounding and slightly wispy-planar type of upper treble, which sounds very pleasing, while the upper treble on the KE4 is more accurate, more detailed, and more refined.
.
Compared to Dita Audio Project M (325 USD):
.
The sound quality of the KE4 is on par with the more expensive Project M in my opinion. The main difference between the two is the presentation. The Project M is more detailed; it is more forward-sounding with a wider soundstage, more energetic dynamics, and a more vivid sound experience, but it is equally as musical as the KE4. Which one to choose purely depends on my mood. I need both of them in my collection.
.
Compared to Moondrop May (65 USD):
.
This is not a comparison, and it would be so unfair if I did so. It is only here so that I can tell the readers that the Kiwi Ears KE4 is an excellent upgrade to the Moondrop May. If they like the sound signature of the May with an analog cable, they're going to love the KE4, as they have similar sound signature, only that the KE4 is better and more refined sounding.
.
Compared to Kotori Audio Zephyr (150 USD):
.
The Zephyr have a single DD and one BA hybrid driver configuration. The Zephyr is more neutral and has a flatter perceived frequency response with a slightly dark sound presentation, which reminds me of the Sennheiser HD6XX, while the KE4 has a bassy-warm U-shaped sound signature. Both are very good and clean-sounding.
.
Compared to Simgot EA1000 (220 USD):
.
The KE4 has a much deeper and more effortless-sounding subbass, while the EA100 has a more neutral bass, the EA1000 has more forward-sounding midrange and upper midrange, and has a smoth but more illuminated-sounding treble, while the KE4 has a smoother but more relaxed treble. They both have a very extended perceived upper treble extension, but the KE4 being a hybrid and the EA1000 is just a single DD, the KE4's upper treble simply has more finesse. But I have to commend the EA1000 though, for it's excellent upper treble extension for a single DD set. In actual listening, both have their own strengths and weaknesses that are impossible to put into words.
.
Compared to Dunu Falcon Ultra Ti (219 USD):
.
The Falcon Ultra Ti has better imaging, but when it comes to soundstage, the KE4 takes the cake. The KE4 is subbass focused, while the Falcon Ultra Ti is midbass focused in their bass presentation. The Falcon Ultra Ti, when used with ePRo EP00 eartips, has very holographic imaging, but the soundstage in the KE4 is much bigger. The Falcon Ultra Ti has a good midrange note weight, but the KE4 is simply more lush sounding. The Falcon Ultra Ti has a more forward and analytical treble presentation while slightly laid back with the KE4, but the upper treble on the KE4 is much better as it is simply more extended in the perceived frequency response. Simply put, if you want the very coherent single DD goodness, get the Dunu Falcon Ultra Ti. I'm not saying the KE4 lacks coherence, because the blending between its drivers is seamless. But if you want excellent musicality, simply get the Kiwi Ears Ke4.
.
Pro:
.
The price-to-sound quality ratio is very good.
The bass has excellent extension.
Fantastic sounding upper treble
Very pleasing tuning
Bassy-warm U-shaped sound signature
Very good sound when paired with its stock eartips
.
Cons:
.
Simplistic packaging (not really a con)
It needed long burn-in times (not a problem really)
Only available with 3.5mm cable (not a big deal)
.
Conclusion:
.
I don't think I need to say it, but I'll say it again that I am very pleased with the sound of the KE4. The combination of the good price for the sound that you get, the subbass extension, the lush midrange, the refined and very extended treble, and the pleasing yet fun sound earns the Kiwi Ears KE4 its high recommendation.
.
Happy listening! Cheers!
.
Non-affiliated purchase link:
.
https://kiwiears.com/products/kiwi-ears-ke4
Disclaimer:
Finally, I have the opportunity to review the Kiwi Ears KE4, my first IEM from this brand. It took me a while to get noticed by this brand that seemed unreachable. But luckily they noticed some of my reviews and I’m happy to be able to try this new brand.It gives much more satisfaction to be sought for reviews, and I must admit that I was very pleased to be contacted by them.
The Kiwi Ears KE4 is a hybrid IEM with two DD and 2 BA, of which one is branded Knowles. Price range around 200 USD.
However, the review will still be 100% honest and in no way biased.
I’m not an audiophile; I’m just a guy that likes to test out different IEMs and DACs and spends a lot of time listening to music.
So I’m not going to use super technical words to review it, but I will do my best to describe it.
Tech Specs:
- Driver Types: 2 Balanced Armatures, 2 Dynamic Drivers, 1 Knowles RAD-33518, 1 Customized RAB-32257
- Driver Details: 1 Ultra-High Frequency Driver, 1 Mid-High Frequency Driver, 2 Low Frequency Drivers
- Crossover: 3-Way Crossover
- Sensitivity: 102dB (±1dB)
- Impedance: 28 ohm
Packaging:
The Kiwi Ears KE4 got very sober packaging, simple, concise but effective. The brand shows seriousness in the presentation of the product and this is also reflected in the final product. The package is fairly complete:
- Cable with standard 3.5mm terminal
- Branded Hard case
- 3 pairs of special tips included
- Nozzle filters
- Manual and QC
Cable + tipsIf I had to point something out, it would be the presence of only the 3.5mm jack terminal and the inability to select a balanced 4.4mm. The tips, as we will see later, are excellent but perhaps not for this IEM.
Design/Build quality:
The build quality of the Kiwiears KE4 is definitely excellent; the quality is in line with other brands in the same price range; good shells; simple and serious aesthetics that never hurt. The shells are a bit massive but standard shape, and the material is very dark resin coupled with silver faceplates. Very classic and serious design.
FaceplateThe most particular things that we can notice are the filter and mesh of the nozzle. I think I have never seen such a massive mesh; it seems to limit the output a lot; it could be to tame the BA but it is really particular. The 2-pin connector is integrated into the shell and is a very pleasant detail. As for the ventilation holes, I noticed the one on the back of the IEM, which is a pretty big grid.
The faceplates are very sober, nothing particularly colorful, a silver color but still beautiful and in line with the serious brand it is.
Overall, the cable is of good quality, being thin, light, and soft. Instead, the tips incorporate an additional grid into the nozzle, which, in my opinion, reduces the overall sound quality. It is probably a very subjective opinion and there are those who will appreciate their use.
Tips Rolling:
I did a very quick first listening test and I immediately came to the conclusion that the included tips were limiting its sonic and technical possibilities. I opted for some cheap SS20 (wide bore tips) and immediately the situation became much more inviting. The sound opens up considerably; the trebles are more sparkling, but also the other frequencies are much more “alive.” The notes gain weight and air. My advice is to opt for at least wide bore tips or tips different from the stock ones, especially if the trebles don’t worry you.
Comfort/Fit:
The Kiwi Ears KE4 is an IEM with a fairly classic shape that fits normally. It is slightly more massive than usual but by developing in depth at the maximum, it protrudes slightly more from the ear. The original cable is very light and flexible so comfort is maximum. You should not have any problems with stability or discomfort from prolonged use.Initial sound impression:
I honestly didn’t know what to expect from this brand because I’ve never had the chance to try one of their IEMs; I just read the reviews of other reviewers. I knew I should have expected a very good quality product and so it was.The sound is immediately extremely rich in details, with the right emphasis on the notes that makes the experience very pleasant. For my tastes, it is a very smooth, safe tuning with a nice feeling of open soundstage. It has that atmospheric feeling given by the bass and rich mids, with the right weight of the voices but also the string instruments make you feel the air moved by the pinching of the strings (you need the right tracks obviously). The tuning is quite natural tending to warm but somehow the level of energy and treble remain sparkling and energetic. Perhaps in terms of bass, the texture is not always in line with the rest.
Equipment used for testing:
Device:- OSX
- Poco M4 Pro
- Amazon Music UHD 24bit 96kHz
- Moondrop Dawn Pro
- Fosi SK02 (most used)
- Muse Hifi M4
- Fiio KA11
- Fiio KA17
- Fosi DS2
- Simgot DEW4X
- EPZ TP20 Pro
- Hidizs S9 Pro Plus
- EPZ TP50
- Creative SoundBlaster X5
Final sound impression:
The Kiwi Ears KE4 proves to be a very organic and musical-sounding IEM. The new Meta target tuning is definitely a plus; we see nothing but Harman curve IEMs on the market now. I won’t go into detail about this tuning but you can find more information online. Let’s say that reviewing IEMs is becoming a bit monotonous if everyone aims to follow the same curve. I don’t think you can really get tired of listening to an IEM like this. All the frequencies stand out mostly clean and allow you to listen to your favorite tracks without losing any detail at all. The tuning is not extreme but more plain oriented but it shows the maturity of the brand; it is not the most natural IEM on the market, and the presence of BA always gives a feeling that is somehow not too natural to my ears. In any case, it does not do badly compared to all the frequencies; the mids are those that slightly stand out the most, giving a good depth to the voices and notes. The whole thing is very fluid and well mixed, making the listening never banal or unexciting.
Cable rolling:
Kiwi Ear KE4 + Effect Audio Ares II Cable
Kiwi Ear KE4 + Effect Audio Ares II CableBecause I suspected the Kiwi Ears KE4 needed more juice, I decided to experiment with a balanced cable. For the occasion, I used the newly arrived Effect Audio Ares S II cable. Connected to the Fosi SK02 brings out a few more points on the low and high frequencies. In terms of sound, there is a change. I can not say it is because of the cable’s excellent quality, but rather because the drivers’ proper power supply allows them to reach their full potential. My advice is to use a balanced cable. I wonder why they didn’t decide to sell the balanced variant on the site too.
Bass
With the cable swap and the switch to a balanced power supply, the result, in my opinion, improves slightly. However, the texture could also be better; sometimes it seems barely enough on some tracks and perfect on others. It is not the kind of IEM I would listen to D&B with but more quiet and refined genres are absolutely suitable. The bass helps to add weight and thickness in the midregion. In fact, if you have the chance to listen, you will notice how they blend together perfectly. On particularly pushed tracks, you may notice some bass bleeding into the mids.Mids
The mid frequencies are the real protagonists of this set. Their advanced positioning compared to the others makes the mids particularly attractive, full, and rich in details. The voices are quite natural with a slightly warm touch. The musical instruments are quite coherent but what is most surprising is the emphasis that the voices and notes have. The guitar strings are clearly heard thanks to the organic nature that makes you perceive the air moved by them.Treble
The trebles were kept safe in an excellent way. Honestly, the presence of the BAs always worries me because they can become extremely hard to tolerate if not properly filtered or tuned. In this case, they are slightly recessed but still very well detailed, with a good presence of macro-micro details. Using the included tips, they can be further reduced using the stock tips but personally, I helped them to emerge better with wide bore tips. Since their extension is limited, the air is also limited. I would have preferred perhaps a slightly larger quantity.Soundstage and Imaging:
The soundstage of the Kiwi ears KE4 is well developed; in my opinion, the original tips limit the stage width slightly, but this is easily remedied. In terms of size, there are planar drivers that perform better in this price range, but the atmospheric effect enhances the soundstage significantly. Let us say it gets by, but it is only average, and in some cases, below average. In terms of imaging, we are faced with an excellent image if the sound tracks do not reach hard-core levels. The more complex tracks tend to lose some detail here and there. I find the layering good; everything is well separated and reaches the eardrum cleanly. Maybe there is a little bass bleeding into the mids but it is not easy to notice.Fast Comparison:
Vs. Letshuoer S12 2024 ED
If you consider that we are in the same price range, you can immediately appreciate the qualities of the planar driver. Honestly, planar drivers are completely losing the artificial timbre and even the bass is becoming more and more similar to that of the DD. The result you get from a single planar driver is often superior to using multiple drivers. The Letshuoer S12 2024 ED is extremely versatile and suitable for different musical genres.
Vs. Simgot SuperMix 4
The Supermix are an exotic hybrid set well-rendered by Simgot. It costs a little less but still delivers an even more neutral, fast, and sparkling sound. Being a more Harman tuning, we find exactly what we expect to find. The configuration is extremely particular but Simgot always manages to achieve an excellent result. They are so different from each other that it is impossible to prefer one to the other. Being a bit of a lover of low frequencies, I lean a little towards the SuperMix 4. But the reality is that it depends on the mood of the day.
Conclusion:
I’m honestly surprised by Kiwi Ears KE4. It was a brand I wanted to try for a long time but it was difficult for me to reach them. The KE4 are something slightly different from the norm with this new META target curve. I’m surprised how they managed to emphasize the mid frequencies that sound quite natural with a touch of warmth; great job also on the treble that they avoided making it sharp even if it limits a bit the presence of air and therefore the perception of the soundstage. As for the bass, the texture is not in its best shape. You only notice it on very complex basshead tracks. However, even if it is not a particularly heavy set of bass, the reproduction of the same in the mix is more than good for my tastes. The only criticism I can make is on the choice of standard equipment; in my opinion, the balanced cable brings real advantages to the dynamics of the drivers and the included tips should be at least two types for a 199 USD set.
In conclusion, it is a set that is positioned in a price range very rich in competitors. The choice is so difficult that not even I would be sure on what to choose, but if you want a hybrid set that is smooth, balanced, and musical, this is certainly a very good choice. Keep in mind, however, to change the tips and perhaps also the cable.
More Information & Where to Buy?
Kiwi Ears KE4Official Site (no affiliations)
Specs And Driver Configuration
Accessories Package
The accessories provided for the box are good for the price.
Things included in the box are a Zipper carry case, 1 set of front filters, 3 sets of kiwiears flex tips, and 1 cable. The cable provided is decent. It feels robust enough but it tangles very easily. The cable is also non modular, many iems in the same price category provide modular termination system.
The eartips provided are good, they feel very similar to spinfit eartips and provide a secure and snug fit.
The carry case provided is also very good its the perfect size for pocketability and you can easily fit your iems and a dongle dac in it.
Design, Fit and Comfort
The looks and design of ke4 are very good in my opinion. It has a very understated and professional look to it. It is not as blingy as other sets like 61t. The combination of black resin shell and silver faceplate looks very premium and professional. So, if you want an iem that is perfect to wear in an office or you want an understated aesthetic this is the perfect iem for you.
The iem is on the lighter side, yet feels robust and sturdy enough. The shell has semi custom shape with a very good molded design. The nozzle of this iem is also medium-sized. All these factors made the iem very comfortable to wear, I can easily wear this iem for hours on end, without any issues.
There are no pressure build-up issues in this iem as well. The isolation provided is decent, not the best but good enough.
Drivability
Kiwiears is very efficient iem. I first plugged it into my samsung dongle and it powered it fine, then I used ibasso dc07pro and it scaled. Then I plugged it in the mojo2 and it didn’t scale much. So, if you have a decent dongle dac that would be enough to power this iem.
Frequency Response
I used divinus velvets to do my sound analyis. Ke4 is a love letter to jm1 target. It follows it very well and has a very tasteful bass boost to make it sound fun.
Bass
The bass here is decent. Notes are not that well defined the initial attack is slightly on the the blunted side. The decay lingers for a bit too long and this makes the bass slower sounding and less defined. Overall bass is slightly poofy sounding. But, I think for the price the bass performance is ok. The sub-bass extension is very good, it hits deep notes with good authority. The rumble and texture are also decent. The mid-bass thump and slam are decent with good enough thump and slam.
Mids
The mids are truly the special sauce of this IEM, as it follows the new JM1 meta-style tuning. They capture all the best qualities that this type of tuning offers. The mids are smooth and incredibly natural-sounding, neither too lean nor too thin, but perfectly balanced. The lower mids have enough heart and body to sound natural, while the upper mids extend just enough to give vocals and instruments in that range a sense of air and presence without becoming shouty or overly forward. Instruments like guitars, cellos, violins, pianos, flutes, and Indian bansuri sound fantastic, richly natural and beautifully rendered. Vocals are equally impressive, with male vocals having ample heft and body for a weighty, natural presentation. Female vocals are given justice too, with great extension and weight. If the bass quantity were slightly reduced, the vocals would shine even more. Overall, there are no significant issues with the mids.
Treble
The treble is also executed very well on this iem. The treble is smooth there are no abrupt peaks or dips. The overall tuning of the treble is on the safer side, but that doesn’t mean it’s not detailed or extended. The micro detail pickup is good for the price. The treble extension is also good for the price, it has enough air to make it sound airy and open.
Detail retrieval and Technical Performance
The overall detail retrieval of this IEM is decent. Micro-detail pickup is good, allowing you to catch the finer nuances in tracks. However, macro-detail performance could have been better, as the IEM doesn’t sound particularly dynamic or punchy. The technical performance is acceptable for its price range, with one standout aspect being the stage width. However, it lacks a strong sense of front-to-back depth, resulting in a somewhat pill-shaped soundstage. Instrument separation and layering are adequate for the price, and the imaging performance is solid as well.
Kiwiears KE4 vs Juzear 61t vs Truthear Nova
I chose truthear nova and Juzear 61t to compare to ke4.
In terms of accessories, I find 61t to be the best, nova to be second, and ke4 in last place. The cable provided with 61t feels super premium for the price. Nova’s cable is also very good but has some microphonics. Ke4’s cable is good but I find nova and 61t’s cable to be slightly better. In terms of looks and aesthetics, if you want out and out catchy and blingy design you have to go for 61t. It looks very eye-catching and beautiful. The nova strikes a perfect balance between bling and elegance and ke4 looks very understated and professional. In my personal opinion, I like nova’s looks the best. In terms of build quality Nova and 61t are neck and ke4 falls slightly behind. Both nova and 61t feel slightly better built when compared to ke4, they feel more dense. In terms of fit and comfort ke4 is way better than 61t and nova. 61t has pressure build-up issues and nova’s shell is on the larger side.
Now to the main part the sound. Nova has a harman neutral sound signature, ke4 is more closer to the jm1 target and 61t has a warmish laid-back sound.
In terms of bass tuning, I would say ke4 is the winner, it has good sub-bass and mid-bass. Nova focuses more on sub-bass rumble than mid-bass thump and 61t also has a smooth glide from sub-bass to mid-bass. In terms of bass quality, I like nova better. The sub-bass rumble is better and mid-bass is less yet it punches very well. The bass attack is well-defined with very natural decay. In second place I like 61t’s bass quality it falls very slightly short of Nova and in third place is ke4. As I mentioned earlier ke4’s bass notes and attack are not that well-defined, the decay is also on the slower side.
Now, to mid-range. I would pick ke4. The mid-range is very natural and plays instruments and both male and female vocals very well. If you want your iem to have cleaner lower mids then Nova will be better for you. Nova also plays female vocals better. 61t has a laid back mids so if you want laid-back mids 61t is the way to go for. But, its midrange tuning leads to slight congestion.
In terms of treble Nova has the smoothest treble with ke4 in second place with a very slight margin. But in terms of treble tuning, I like ke4 the best it has the most extended and airy treble.
In terms of detail retrieval, 61t comes first and ke4 and nova are neck to neck. In terms of stage width ke4 is the widest but ke4 does not present front and back depth that well. In terms of front and back depth nova wins and 61t comes second. In terms of instrument separation and laying ke4 edges ahead both and in terms of imaging nova is slightly better than both.
Conclusion
If you’ve been curious about the new meta-style tuning and are looking for an affordable entry point, Kiwi Ears has effectively addressed that with the KE4. It's the most budget-friendly IEM offering this type of tuning, yet it executes it exceptionally well. Is it flawless? Of course not nothing is. While it offers outstanding tuning, there are some trade-offs in detail retrieval and technical performance. Still, this IEM remains the most accessible way to experience the new meta-tuning. It also serves as an excellent complementary set to IEMs like the Truthear Nova and Simgot Supermix 4.
- 2 DD + 2 BA Driver (1 Knowles RAD-33518, 1 Customized RAB-32257)
- 3-way network crossovers
- Impedance: 28Ω
- Sensitivity: 102dB (±1dB)
Accessories Package
The accessories provided for the box are good for the price.
Things included in the box are a Zipper carry case, 1 set of front filters, 3 sets of kiwiears flex tips, and 1 cable. The cable provided is decent. It feels robust enough but it tangles very easily. The cable is also non modular, many iems in the same price category provide modular termination system.
The eartips provided are good, they feel very similar to spinfit eartips and provide a secure and snug fit.
The carry case provided is also very good its the perfect size for pocketability and you can easily fit your iems and a dongle dac in it.
Design, Fit and Comfort
The looks and design of ke4 are very good in my opinion. It has a very understated and professional look to it. It is not as blingy as other sets like 61t. The combination of black resin shell and silver faceplate looks very premium and professional. So, if you want an iem that is perfect to wear in an office or you want an understated aesthetic this is the perfect iem for you.
The iem is on the lighter side, yet feels robust and sturdy enough. The shell has semi custom shape with a very good molded design. The nozzle of this iem is also medium-sized. All these factors made the iem very comfortable to wear, I can easily wear this iem for hours on end, without any issues.
There are no pressure build-up issues in this iem as well. The isolation provided is decent, not the best but good enough.
Drivability
Kiwiears is very efficient iem. I first plugged it into my samsung dongle and it powered it fine, then I used ibasso dc07pro and it scaled. Then I plugged it in the mojo2 and it didn’t scale much. So, if you have a decent dongle dac that would be enough to power this iem.
Frequency Response
I used divinus velvets to do my sound analyis. Ke4 is a love letter to jm1 target. It follows it very well and has a very tasteful bass boost to make it sound fun.
Bass
The bass here is decent. Notes are not that well defined the initial attack is slightly on the the blunted side. The decay lingers for a bit too long and this makes the bass slower sounding and less defined. Overall bass is slightly poofy sounding. But, I think for the price the bass performance is ok. The sub-bass extension is very good, it hits deep notes with good authority. The rumble and texture are also decent. The mid-bass thump and slam are decent with good enough thump and slam.
Mids
The mids are truly the special sauce of this IEM, as it follows the new JM1 meta-style tuning. They capture all the best qualities that this type of tuning offers. The mids are smooth and incredibly natural-sounding, neither too lean nor too thin, but perfectly balanced. The lower mids have enough heart and body to sound natural, while the upper mids extend just enough to give vocals and instruments in that range a sense of air and presence without becoming shouty or overly forward. Instruments like guitars, cellos, violins, pianos, flutes, and Indian bansuri sound fantastic, richly natural and beautifully rendered. Vocals are equally impressive, with male vocals having ample heft and body for a weighty, natural presentation. Female vocals are given justice too, with great extension and weight. If the bass quantity were slightly reduced, the vocals would shine even more. Overall, there are no significant issues with the mids.
Treble
The treble is also executed very well on this iem. The treble is smooth there are no abrupt peaks or dips. The overall tuning of the treble is on the safer side, but that doesn’t mean it’s not detailed or extended. The micro detail pickup is good for the price. The treble extension is also good for the price, it has enough air to make it sound airy and open.
Detail retrieval and Technical Performance
The overall detail retrieval of this IEM is decent. Micro-detail pickup is good, allowing you to catch the finer nuances in tracks. However, macro-detail performance could have been better, as the IEM doesn’t sound particularly dynamic or punchy. The technical performance is acceptable for its price range, with one standout aspect being the stage width. However, it lacks a strong sense of front-to-back depth, resulting in a somewhat pill-shaped soundstage. Instrument separation and layering are adequate for the price, and the imaging performance is solid as well.
Kiwiears KE4 vs Juzear 61t vs Truthear Nova
I chose truthear nova and Juzear 61t to compare to ke4.
In terms of accessories, I find 61t to be the best, nova to be second, and ke4 in last place. The cable provided with 61t feels super premium for the price. Nova’s cable is also very good but has some microphonics. Ke4’s cable is good but I find nova and 61t’s cable to be slightly better. In terms of looks and aesthetics, if you want out and out catchy and blingy design you have to go for 61t. It looks very eye-catching and beautiful. The nova strikes a perfect balance between bling and elegance and ke4 looks very understated and professional. In my personal opinion, I like nova’s looks the best. In terms of build quality Nova and 61t are neck and ke4 falls slightly behind. Both nova and 61t feel slightly better built when compared to ke4, they feel more dense. In terms of fit and comfort ke4 is way better than 61t and nova. 61t has pressure build-up issues and nova’s shell is on the larger side.
Now to the main part the sound. Nova has a harman neutral sound signature, ke4 is more closer to the jm1 target and 61t has a warmish laid-back sound.
In terms of bass tuning, I would say ke4 is the winner, it has good sub-bass and mid-bass. Nova focuses more on sub-bass rumble than mid-bass thump and 61t also has a smooth glide from sub-bass to mid-bass. In terms of bass quality, I like nova better. The sub-bass rumble is better and mid-bass is less yet it punches very well. The bass attack is well-defined with very natural decay. In second place I like 61t’s bass quality it falls very slightly short of Nova and in third place is ke4. As I mentioned earlier ke4’s bass notes and attack are not that well-defined, the decay is also on the slower side.
Now, to mid-range. I would pick ke4. The mid-range is very natural and plays instruments and both male and female vocals very well. If you want your iem to have cleaner lower mids then Nova will be better for you. Nova also plays female vocals better. 61t has a laid back mids so if you want laid-back mids 61t is the way to go for. But, its midrange tuning leads to slight congestion.
In terms of treble Nova has the smoothest treble with ke4 in second place with a very slight margin. But in terms of treble tuning, I like ke4 the best it has the most extended and airy treble.
In terms of detail retrieval, 61t comes first and ke4 and nova are neck to neck. In terms of stage width ke4 is the widest but ke4 does not present front and back depth that well. In terms of front and back depth nova wins and 61t comes second. In terms of instrument separation and laying ke4 edges ahead both and in terms of imaging nova is slightly better than both.
Conclusion
If you’ve been curious about the new meta-style tuning and are looking for an affordable entry point, Kiwi Ears has effectively addressed that with the KE4. It's the most budget-friendly IEM offering this type of tuning, yet it executes it exceptionally well. Is it flawless? Of course not nothing is. While it offers outstanding tuning, there are some trade-offs in detail retrieval and technical performance. Still, this IEM remains the most accessible way to experience the new meta-tuning. It also serves as an excellent complementary set to IEMs like the Truthear Nova and Simgot Supermix 4.
Attachments
Disclaimer
I got KE4 for free in return for a review, I am free to say whatever I want.
All impressions are my own subjective thoughts after having used them for a good time. These are my thoughts at this moment, and as time moves I might change my opinion.
This is also a very subjective hobby where everything from experience, anatomy or age will affect what we hear. Also keep in mind that it is easy to use bold words when talking about differences, while it may be perceived as a small change for you.
While I can perceive something as natural sounding, I do believe we can never get a perfect performance similar to what is achieved live.
Ranking System:
1 Very bad or unlistenable
2 Listenable but not good
3 Average
4 Very good
5 Exceptional or having a special sauce
My rating system highly values what is musical for me, so my rating will always be a subjective opinion.
My audio preference is neutral with some warmth, I can also like forward midrange and treble if not excessive. I am a believer in having different tuned gears for different genres or moods instead of chasing the single perfect one.
Main music genres I listen to are metal, electronica, jazz and pop. I am a music lover, and can also listen to almost all the genres out there.
I have been into music gear since the mid 90s, gifted some big speakers at an early age. Then moved more and more into headphones with my entry being Koss Porta Pro and a Sony Discman.
I have tried playing many instruments over the years from piano to saxophone without getting far, this due to not having the biggest patience in learning to play.
My current favorites in Headphones are ZMF Verite Open and Beyerdynamic T1 G2.
My current favorites in IEMs are Alpha Omega OMEGA and LETSHUOER Cadenza 12.
My current favorites in Earbuds are FranQL Caelum and Venture Electronics Zen 3.0.
Gear used in the main rig is Denafrips Ares 12th-1 DAC together with the Topping A90 Discrete headphone amp. I also have a Schiit Lokius I can swap in if I want to do a little analogue EQ.
Portable gear being SONY WM1AM2 and iBasso DX180, with some dongles like HIBY FC6 and Colorfly CDA-M1P.
Main music genres I listen to are metal, electronica, jazz and pop. I am a music lover, and can also listen to almost all the genres out there.
I have been into music gear since the mid 90s, gifted some big speakers at an early age. Then moved more and more into headphones with my entry being Koss Porta Pro and a Sony Discman.
I have tried playing many instruments over the years from piano to saxophone without getting far, this due to not having the biggest patience in learning to play.
My current favorites in Headphones are ZMF Verite Open and Beyerdynamic T1 G2.
My current favorites in IEMs are Alpha Omega OMEGA and LETSHUOER Cadenza 12.
My current favorites in Earbuds are FranQL Caelum and Venture Electronics Zen 3.0.
Gear used in the main rig is Denafrips Ares 12th-1 DAC together with the Topping A90 Discrete headphone amp. I also have a Schiit Lokius I can swap in if I want to do a little analogue EQ.
Portable gear being SONY WM1AM2 and iBasso DX180, with some dongles like HIBY FC6 and Colorfly CDA-M1P.
https://www.linsoul.com/products/kiwi-ears-ke4
https://kiwiears.com/products/kiwi-ears-ke4
https://kiwiears.com/products/kiwi-ears-allegro-mini
https://ibasso.com/product/dx180/
https://www.lavricables.com/line/master
https://plussoundaudio.com/customca...r-Custom-Cable-for-In-Ear-Monitors-p680985243
https://store.hiby.com/products/hiby-fc6
https://kiwiears.com/products/kiwi-ears-ke4
https://kiwiears.com/products/kiwi-ears-allegro-mini
https://ibasso.com/product/dx180/
https://www.lavricables.com/line/master
https://plussoundaudio.com/customca...r-Custom-Cable-for-In-Ear-Monitors-p680985243
https://store.hiby.com/products/hiby-fc6
So what is the Kiwi Ears KE4
The KE4 is the latest hybrid IEM from Kiwi Ears, this has a configuration of 2 dynamic drivers and 2 balanced armatures. The KE4 has a 3 way passive crossover with 3 sound tubes, one for each BA and last for the 2DDs. The shells are black and made from medical-grade resin, and the faceplate is a sort of chrome/silver effect. Minimalistic design, but also well done with a nice finish.
The shells are ergonomic and light, personally I can use them for hours without any problems.
The packaging of the KE4 is minimalistic, it's decent for the price as I don't expect too much. But this is just what I expect for the more budget oriented brand Kiwi Ears, it's nice as we then know most of the money goes into KE4 itself.
The nozzle has an interesting filter I haven't seen before, I do guess this is part of how they tuned the KE4. The size is also average and similar to other models from Thieaudio or most IEM brands.
The shells have a vent that helps remove any possible ear pressure or driver flex, the photo her4e also shows that the shell has some ergonomic touch to it for better contour in your ear.
The included accessories are not the best, they do work to get you going. But for getting everything out of the KE4 I advise upgrading both the tips and the cable for something a little more premium. The price they offer KE4 also reflects the quality of the accessories, this is also a part of why they can sell it for this price.
The stock tips are decent for me, but changing to something like Divinus Wide bore let the treble be more forward for a clearer sound.
So how does the KE4 sound like
Going to use the ranges here in review:
Details in IEMs is down mostly to quality driver and how it amplitudes the frequencies, also when the driver is faster it also increases the resolution you hear. Due to this the KE4 is not the most technical sounding as it follows the new meta tuning, this has less pronounced presence region.
It also has a softness to the transients, in return the sound is easier to listen to.
The bass extends deep and has good sub bass presence, the midbass has good weight but a little soft on the impact. It is a little blooming and has nice warmth to the music, this can affect some lower midrange instruments being more thick.
The midrange is a little soft, not that it's veiled. It's just not forward, in return nothing is sibilant or harsh. Some will love this presentation while others will feel something is missing.
The treble is clear and airy, this is very well extended for a set this price. A few times I feel that there is some BA timbre or less control up top, but my problem is also being used to flagship IEMs.
Kiwi Ears Orchestra Lite
I have only had one other Kiwi Ears model, this being the Orchestra Lite 8BA. They have similar packaging and accessories, the shell of KE4 is more comfortable but the Orchestra Lite looks and feels more premium.
They sound quite different due to both tuning and driver configuration, the KE4 is also a little more technical and more spacious than Orchestra Lite.
Orchestra Lite is more mid centric with full and smooth midrange, not the most airy and not the most bassy. KE4 has much better bass performance and more impactful delivery, it just sounds more real and delivers a more fun experience.
The midrange of KE4 is soft and not the most clear, the Orchestra Lite is more clear and full. The highs are also softer and less open with Orchestra Lite, it's also less refined and has a little BA timbre that the KE4 has almost nothing off.
LETSHUOER Cadenza 4
Next set I will compare with is another hybrid that costs a little more than KE4 at $249, that is the LETSHUOER Cadenza 4 that uses 1DD and 3BA. This has much better accessories, the build quality of the shell feels better and has similar ergonomic design.
The tuning of Cadenza 4 is closer to Harman tuning and has more vocal push than KE4, it also has less warmth. The Cadenza 4 is also a little more technical than KE4, it has some extra details and clearer transients.
Bass is less pronounced on Cadenza 4, but has equally good sub extension. The punch is actually more impactful on Cadenza4 with snappier rebound, the KE4 lingering more instead.
The midrange has a low thickness and sounds more husky on KE4, while the upper mids is less pronounced and softer. Due to this the Cadenza 4 has much more vocal presence, or just instruments in general are clearer and more present in the mix than KE4.
The treble is good on both, at times the KE4 can get too hot. This can be a peak somewhere that I'm more affected to, not true this would happen for everyone else.
Both are great sets, and is down to tuning for what is best.
Kiwi Ears Allegro Mini
Much of my time with KE4 has been with the new dongle from Kiwi Ears, the Allegro Mini. This is a budget dongle costing around $25, it has a small footprint with both 3.5mm and 4.44mm sockets. It got enough power for all the IEMs I tried on it, and even some full size headphones.
My only complaint about the Allegro Mini is that it's no dedicated buttons for volume adjustment, the size and sound is good. The sound is fairly neutral, I cannot pick up any coloration. It is also competitive with other dongles around the price, so it's a good recommendation for your KE4 or other IEMs.
Music
Click here for Audio with Leo playlist
When comparing IEM to other sets I have used the tracks listed here and more, I will also provide some albums I have enjoyed with the KE4.
Conclusion
The Kiwi Ears KE4 is another good set for the price from the brand, it follows the so-called new meta tuning. This is a tuning that has less forward upper midrange while still having great bass and upper extension, this delivers a softer and more easy listening experience.
It has okay technicalities, so while not being the most resolving set it's also no slouch. Same can be said for the soundstage, having an okay soundstage that's not small or large.
What you can expect is a resin IEM that's ergonomic and light, the accessories are on the cheaper side but also good enough to get you going. The bass has good sub bass rumble and reach low, mid bass has okay punch but is a little on the softer side. Midrange is natural, without being too aggressive. Highs are airy and well extended, there is also minimal BA timbre.
I think this is a good recommendation for anyone who wants a set around this price, or if you want to try the new meta tuning style of KE4. Giving it a 4 star on Head-Fi and a personal score of 61/100.
Intro:
This IEM was sent directly from the Kiwi Ears team for me to discuss. Thanks first to those who sent this IEM to me.
At first when I received this IEM, I felt doubtful because the packaging was so-so, typical of Kiwiears IEMs. The packaging contents are also standard for a 200$ IEM. There is a standard Kiwiears case, 3 pairs of tips, a cable of decent quality for its price, and the IEM itself with a fairly good resin material (better material than the quintet).
But what surprised me and made me mistaken was the tips. It turns out the tips are good, the Kiwiears Flex tips are called. The shape is unique, like there is a sound dampener on the nozzle. The price per pair, if I'm not mistaken, is around 5$ on my local shop. No wonder when I tried changing the tips, these default tips were still one of the most suitable for KE4 besides tang sancai narrow bore.
If you opt to choose tang sancai narrow bore, it will improve its stage, imaging, transient, and make ke4 timbre more natural.
Although the housing is concha-shaped, the fitting of ke4 is comfortable. Plus the soft tips material too.
This IEM is a hybrid IEM 2dd isobaric + 2 ba knowles (1 knowles rad + 1 knowles custom rab).
This KE4 is quite light to tow. Why is it so good?
Because to make the sound optimal, this IEM requires a fairly large volume (not power). If towed at low to medium volume, the technical side of this IEM is definitely standard (even similar to the ew300 technical side).
Only when we set the volume to medium high, the technical side will show its fangs according to its price. So for this IEM, I suggest at least the source is allegro mini to bring out its potential.
How about the sound itself? How come there is a meta IEM tuning like in the game aov which has meta? Now let's discuss...
Bass:
The tuning of this IEM is more like the warm ushape jm1 which is an alternative to harman target, and is the new meta this year.
The bass of this IEM tends to be balanced between the mid bass and sub bass. The dd isobaric tuning (the same type as the dd tuning of blessing 3, tea pro, and davinci) makes the rumble sub bass have a deep extension and quite a majestic impression.
For the bass beat, it is typical of isobaric tuning which is hard and quite punchy with a fairly good bass texture, not too bad but not too good either. Because I haven't found an IEM with isobaric tuning that has a nice bass texture.
The quantity of bass is just enough (not as big as davinci and tea pro), the character is not that tight with medium decay. So the speed is not too fast, just okay. Not enough for speeding.
The bass control is quite good, it doesn't bleed into other instruments.
Mid:
The mid sector on this IEM is tuned a bit laid back. There's a little boost in the uppermid, but not that much energy. So for instruments like the electric guitar, it's not that powerful, the energy tends to be just right.
But the presentation is still open, although in my opinion is not that energetic for the high pitch female vocal. It's similar to Que, although it gets more vocal energy in KE4.
What I want to discuss here is more about the mid tuning which is balanced for male and female vocals with the right weight and not too thin. The vocals feel swingy, quite forward, quite sweet, and clean in presentation. For IEMs with meta tuning and isobaric tuning, I can say that the KE4 vocals are among my favorites.
The mids have minimal illnesses like peak, shouty, and sibilance. The crispy acoustic guitar plucks in this IEM also prove that the timbre is quite natural with good coherence.
Even so, the typical BA plasticky sensation is still slightly felt in the mids.
Treble:
The treble is also tuned relaxed and somewhat laid back. Tuned safely, minimal peak, and the timbre is quite natural, although the BA plasticky impression is still slightly there.
The treble has the right weight, not too energetic, and the extension is quite good until the end.
The sound of the cymbal crash feels quite detailed and pleasant to listen to for a long time with its mature and good tuning.
The coherence with the other drivers is also good. It doesn't feel like the timbre is too different between the drivers.
Technical:
Now this is interesting, haha. As I discussed in the intro, there are some differences in perception between reviewers regarding the technical aspects of ke4.
Actually, I think the determining factor is in the volume level. In this technical discussion, on the Tempotec V3 jack 3.5 source, I set the volume to 46 at low gain (this is already higher than the medium volume on other sources), and on the Allegro Mini, I set my phone volume to 60 to 70 percent.
In terms of detail, resolution, and micro detail, ke4 is quite good. On the same level as Quintet, P1 Max 2, or MP145. Slightly above Supermix, Kara (mod version), also PA02, QoA Adonis, Oxygen, and other 2 million IEMs.
In terms of detail, resolution, and micro detail, ke4 are quite good. On the same level as the quintet, p1 max 2, or mp145. Slightly above the supermix, kara (mod version), pula pa02, qoa adonis, oxygen and other 200$ IEMs.
The stage is quite wide and balanced. Not as wide and as wide as the supermix, but the depth and height of the stage are better. Making the imaging more precise and spread in all directions.
The separation is quite good, although not as good as its big brother, the quintet. It still feels a bit stacked compared to the quintet and orchestra lite.
The stage is quite wide and balanced. Not as wide and as wide as the supermix, but the depth and height of the stage are better. Making the imaging more precise and spread in all directions.
The separation is quite good, although not as good as its big brother, the quintet. It still feels a bit stacked compared to the quintet and orchestra lite.
The clarity is surprisingly clear with good dynamics. Make the musical nuances even more solid in this IEM.
Unfortunately, the transient is only medium, not very fast. So it's not suitable for heavy double pedal songs.
The scalability of this IEM is quite good. Using a verus magni 4 cable and austamora mix jack sena gold makes the technique even better and can be head 2 head with blessing 3, davinci, and project m.
Outro:
I can say that Kiwiears KE4 is Kiwiears' IEM that really focuses on its balanced and musical tuning without forgetting the technical side.
In my opinion, this IEM has succeeded in implementing meta tuning and isobaric tuning well for its price, and it seems that KE4 is still the cheapest IEM to experience dd isobaric tuning and meta tuning at the same time.
Another thing to note is that this IEM is not so good technically at medium to low volumes. If you are a lowkey volume lover, you shouldn't expect more for its technical side. If you are a lowkey lover, I suggest you just take the quintet or the supermix 4 is also possible.
But if you don't mind medium high volume, this IEM is the right choice for you.
In addition to that, this IEM is also less suitable for wibuers who like loud screaming vocals, and less suitable for metal head fans of fast double pedals even though the tuning is all around.
From several things, this IEM is considered worth the price, and with its meta tuning it should be suitable for many people.
So far, this IEM in the range of 2 to 3 million is in my top 3 version along with the quintet and supermix 4.
This IEM was sent directly from the Kiwi Ears team for me to discuss. Thanks first to those who sent this IEM to me.
At first when I received this IEM, I felt doubtful because the packaging was so-so, typical of Kiwiears IEMs. The packaging contents are also standard for a 200$ IEM. There is a standard Kiwiears case, 3 pairs of tips, a cable of decent quality for its price, and the IEM itself with a fairly good resin material (better material than the quintet).
But what surprised me and made me mistaken was the tips. It turns out the tips are good, the Kiwiears Flex tips are called. The shape is unique, like there is a sound dampener on the nozzle. The price per pair, if I'm not mistaken, is around 5$ on my local shop. No wonder when I tried changing the tips, these default tips were still one of the most suitable for KE4 besides tang sancai narrow bore.
If you opt to choose tang sancai narrow bore, it will improve its stage, imaging, transient, and make ke4 timbre more natural.
Although the housing is concha-shaped, the fitting of ke4 is comfortable. Plus the soft tips material too.
This IEM is a hybrid IEM 2dd isobaric + 2 ba knowles (1 knowles rad + 1 knowles custom rab).
This KE4 is quite light to tow. Why is it so good?
Because to make the sound optimal, this IEM requires a fairly large volume (not power). If towed at low to medium volume, the technical side of this IEM is definitely standard (even similar to the ew300 technical side).
Only when we set the volume to medium high, the technical side will show its fangs according to its price. So for this IEM, I suggest at least the source is allegro mini to bring out its potential.
How about the sound itself? How come there is a meta IEM tuning like in the game aov which has meta? Now let's discuss...
Bass:
The tuning of this IEM is more like the warm ushape jm1 which is an alternative to harman target, and is the new meta this year.
The bass of this IEM tends to be balanced between the mid bass and sub bass. The dd isobaric tuning (the same type as the dd tuning of blessing 3, tea pro, and davinci) makes the rumble sub bass have a deep extension and quite a majestic impression.
For the bass beat, it is typical of isobaric tuning which is hard and quite punchy with a fairly good bass texture, not too bad but not too good either. Because I haven't found an IEM with isobaric tuning that has a nice bass texture.
The quantity of bass is just enough (not as big as davinci and tea pro), the character is not that tight with medium decay. So the speed is not too fast, just okay. Not enough for speeding.
The bass control is quite good, it doesn't bleed into other instruments.
Mid:
The mid sector on this IEM is tuned a bit laid back. There's a little boost in the uppermid, but not that much energy. So for instruments like the electric guitar, it's not that powerful, the energy tends to be just right.
But the presentation is still open, although in my opinion is not that energetic for the high pitch female vocal. It's similar to Que, although it gets more vocal energy in KE4.
What I want to discuss here is more about the mid tuning which is balanced for male and female vocals with the right weight and not too thin. The vocals feel swingy, quite forward, quite sweet, and clean in presentation. For IEMs with meta tuning and isobaric tuning, I can say that the KE4 vocals are among my favorites.
The mids have minimal illnesses like peak, shouty, and sibilance. The crispy acoustic guitar plucks in this IEM also prove that the timbre is quite natural with good coherence.
Even so, the typical BA plasticky sensation is still slightly felt in the mids.
Treble:
The treble is also tuned relaxed and somewhat laid back. Tuned safely, minimal peak, and the timbre is quite natural, although the BA plasticky impression is still slightly there.
The treble has the right weight, not too energetic, and the extension is quite good until the end.
The sound of the cymbal crash feels quite detailed and pleasant to listen to for a long time with its mature and good tuning.
The coherence with the other drivers is also good. It doesn't feel like the timbre is too different between the drivers.
Technical:
Now this is interesting, haha. As I discussed in the intro, there are some differences in perception between reviewers regarding the technical aspects of ke4.
Actually, I think the determining factor is in the volume level. In this technical discussion, on the Tempotec V3 jack 3.5 source, I set the volume to 46 at low gain (this is already higher than the medium volume on other sources), and on the Allegro Mini, I set my phone volume to 60 to 70 percent.
In terms of detail, resolution, and micro detail, ke4 is quite good. On the same level as Quintet, P1 Max 2, or MP145. Slightly above Supermix, Kara (mod version), also PA02, QoA Adonis, Oxygen, and other 2 million IEMs.
In terms of detail, resolution, and micro detail, ke4 are quite good. On the same level as the quintet, p1 max 2, or mp145. Slightly above the supermix, kara (mod version), pula pa02, qoa adonis, oxygen and other 200$ IEMs.
The stage is quite wide and balanced. Not as wide and as wide as the supermix, but the depth and height of the stage are better. Making the imaging more precise and spread in all directions.
The separation is quite good, although not as good as its big brother, the quintet. It still feels a bit stacked compared to the quintet and orchestra lite.
The stage is quite wide and balanced. Not as wide and as wide as the supermix, but the depth and height of the stage are better. Making the imaging more precise and spread in all directions.
The separation is quite good, although not as good as its big brother, the quintet. It still feels a bit stacked compared to the quintet and orchestra lite.
The clarity is surprisingly clear with good dynamics. Make the musical nuances even more solid in this IEM.
Unfortunately, the transient is only medium, not very fast. So it's not suitable for heavy double pedal songs.
The scalability of this IEM is quite good. Using a verus magni 4 cable and austamora mix jack sena gold makes the technique even better and can be head 2 head with blessing 3, davinci, and project m.
Outro:
I can say that Kiwiears KE4 is Kiwiears' IEM that really focuses on its balanced and musical tuning without forgetting the technical side.
In my opinion, this IEM has succeeded in implementing meta tuning and isobaric tuning well for its price, and it seems that KE4 is still the cheapest IEM to experience dd isobaric tuning and meta tuning at the same time.
Another thing to note is that this IEM is not so good technically at medium to low volumes. If you are a lowkey volume lover, you shouldn't expect more for its technical side. If you are a lowkey lover, I suggest you just take the quintet or the supermix 4 is also possible.
But if you don't mind medium high volume, this IEM is the right choice for you.
In addition to that, this IEM is also less suitable for wibuers who like loud screaming vocals, and less suitable for metal head fans of fast double pedals even though the tuning is all around.
From several things, this IEM is considered worth the price, and with its meta tuning it should be suitable for many people.
So far, this IEM in the range of 2 to 3 million is in my top 3 version along with the quintet and supermix 4.
Kiwi Ears KE4 ($199): A first for me, but hopefully not a last.
4.3 stars.
KE4
Intro:
This is the first model from Kiwi Ears that I have heard. Many have waxed about previous models, and I did come to appreciate what the company brought to the market with this model. I also realize some of the company's past iterations can be polarizing. This unit will be judged on its merits, alone. The unit is mine to keep as I see fit, but may be asked back for at any time. This unit will not be flipped after reviewing, as that is still really, REALLY uncool to do.
I thank Kiwiears for the opportunity to review the KE4 and look forward to more options in the future.
Specs:
Drivers: 2 Balanced Armatures, 2 Dynamic Drivers, 1 Knowles RAD-33518, 1 Customized RAB-32257
Driver Details: 1 Uitra-High Frequency Driver, 1 Mid-High Frequency Driver, 2 Low Frequency Drivers
Crossover: 3-Way Crossover Network
Sensitivity: 102dB (±1dB)
Impedance: 28 ohms
In The Box:
Kiwi Ears KE4
3.5mm se cable
Case
3x silicon tips
2x Nozzle filters
Gear Used/Compared:
Shanling MG100 ($159)
QoA Aviation ($199)
LetShuoer Cadenza 4 ($249)
HiBy R4
MBP/HiBy FD5
Music used:
Yes.
Unboxing:
The KE4 comes in a small, mostly square box with the venerable slide-off paperboard sleeve. With the IEM on the front, measurements on the side, and other information on the back, it is par for the course.
Taking the sleeve off and lifting the lid, you are presented with a protective foam/paperboard cradle housing the IEMs. Underneath, the case carries the cable, tips, and nozzle filters.
There is nothing special about it, but I like the efficiency of the packaging.
Design/Tech details:
The bass is handled by dual dynamic drivers, while the midrange and lower treble use a customized RAB-32257 balanced armature driver. A Knowles RAD-33518 balanced armature driver carries the upper treble region, rounding out the four drivers per side.
A 3-way crossover network ties the drivers together, which also operate via three independent sound tubes.
The larger black shells carry a silver faceplate on the back, along with a nib on the inside. There is also a grated vent hole for the dual dynamic drivers, which you could theoretically apply to the nozzle filters. Since four are included, you could vary the amount of bass by covering the vent hole, nozzle, or both.
Some say the fit is exceptional. I found it a tad big for my ears, and the nib to be a bit big. I would have preferred a smaller nib, which I believe could have countered the larger size, and pressure I felt when wearing for long sessions.
The 2-pin connection is tight, and one must take care when connecting the cables, but once done, microphonics are non-existent, and isolation was excellent using the included medium tips. I found no driver flex upon inserting either, as some have noted in their reviews.
The molded resin shells, combined with the flexible, pliable cable, make for an understated IEM, that could bely what follows.
Sound Impressions:
Listening impressions were made on the HiBy R4 and MBP/HiBy FD5 combinations, along with the Cayin N6ii, A01 motherboard.
Summary:
Some have labeled the KE4 as open with a more neutral signature, while others mention a smoother, bass-oriented signature. Tip choice plays a part in this, but the signature is not neutral to me other than the fairly smooth sound graphs that many produce. I find the good bass bleeds into the lower mids, which can either enhance or hinder your experience whether you like that or not. To me, the mids are the star, and this hinders slightly, but the bass quality is such that it can also be a positive.
Timbre:
As mentioned above, many find the sound neutral, with a smooth character that promotes a bit of warmth. I do find there is some warmth to the signature, but the bass overrides the neutral character to me. The dual dynamic driver allows the low end to shine with a good thump. The midbass is full and robust, mimicking the “Harmon target,” which, in this case, I like. The bulbous feel to it allows that thump to drive the foundation without promoting too much into the lower midrange.
The tight control of that bass in a speedy attack and decay allows the lower mids to shine. I find this to be the best part of the signature, as others have mentioned (there are many parts in which we agree). Vocal treatment is especially good here, as are acoustic guitar sounds in this range. Again, the word control comes to mind, which may seem a bit antithetical to the warmer signature. At least in my mind.
The natural character of the whole midrange is one of the best I have heard of late, and never did I tire of listening at multiple volume levels. That warmth in the upper midrange may not be to everyone’s liking, but for me, it hits all of the sweet spots in warmth, and a lack of intrusion upon my listening enjoyment.
The 3-6 kHz region is elevated, and some will not like this hit, but to me, it promotes the movement into the lower treble regions without becoming gritty or too obtuse. That said, female vocals in this region can come off slightly harsh, but I make it a point to listen to the whole signature without focusing on any seemingly short temperamental discrepancies. Some will like that fuller note of female vocals and the weight that grit provides. I am one of those who do.
There is a push in the upper treble, which mimics the push down low, making for a more U-shaped signature than a tighter V-shaped one. This leads to the smoother, more laidback character of the overall signature to me.
A term thrown around, which I was not previously aware of, is “new meta” in IEM tuning, which adds to the midrange tuning, moving slightly away from the typical Harman Target. What I find here is that the midrange is sumptuous to me, while the “more typical” high and low tuning affords a coherent overall signature. I am a fan of not using the Harman Target as a choice, especially since I prefer a warmer signature. And in that regard, the KE4 matches my preferences.
Staging & Dynamics:
With a smoother signature IEM, you run the risk of not having clearly defined layers, which can hinder transient response across the spectrum. The KE4 does suffer in that regard, but I find the melding of those layers as complimentary to each other as opposed to separating. Since the character, to me, is slightly smoother, it is natural to have less differentiation in the layers, presenting a more thoroughly mixed signature than defined layers.
This hurts in defining the exact placing of instruments, but again, I look at the overall signature as opposed to the individual parts. If a more analytically accurate signature is what you want, then you should probably look elsewhere. The KE4 is about musicality across the three dimensions, and it does so with aplomb.
Griffin Silver in his excellent review of the KE4 for Headphones.com mentioned this regarding soundstage: “Now, spaciousness or “soundstage” are very subjective qualities. Even if we hear the tone fairly similarly between us, we’re not guaranteed to unpack the same features the exact same way. For example, instead of perceiving a difference between tonal regions as “distance,” I could very well see a listener perceiving this kind of tone as just “claustrophobic due to excess lower midrange, or a deficit in the upper midrange.” That said, KE4 struck me as one of the more spacious IEMs I’ve tried, so if you’re the kind of listener that cares about that, KE4 might end up being a good choice for that.”
I have to agree with this assessment and understand the necessity of quantifying soundstage for listeners. We hear things differently, and perceive “distances” of stage differently, too. As such, I agree that the KE4 presents itself as
Pairings:
The KE4 paired easily with everything I tried, from my MBP to the HiBy R4 and FD5 (tethered to my MBP). It also worked well with my older Cayin N6ii.
I never felt a lack of power using any sources, and the sound coming through matched my observations above. I also wouldn’t say there was a single favorite of mine, which means it scales quite well across sources.
Select Comparisons:
Shanling MG100 ($159)
Courtesy of my Headfonics review
MG100
When I reviewed the MG100, it was a step back in the right direction for Shanling, one of my favorite companies. I also felt the price point was quite good, too, making for a very good listen. Much of what is listed below comes straight from my Headfonics review but with added comparisons between the MG100 and KE4.
Technical:
The Shanling MG100 uses a 10mm dynamic driver and HCCAW voice coil with a lightweight temperature-resistant ceramic diaphragm enclosed within a dual magnet design.
Instead of the MG800’s titanium, the MG100 reverts to a 7000-series aluminum carved on a 5-axis CNC machine for the sound chamber.
The MG100 is rated for an impedance of 16Ω and sensitivity of 113+/-3 dB @1kHz making it an easy-to-drive IEM out of most sources, be it a dongle or a DAP.
Add in two filter choices in brass for a balanced/universal sound or stainless steel for a bassy engaging signature, and the MG100 has the additional benefit of being able to offer two distinct sound signatures.
Design:
One good thing I know about metal is that 6000-series and 7000-series aluminum are light and easy to work with. This means it is perfect for the housing on the MG100.
Using 5-axis CNC machining for precise shaping, the aluminum allows for consistency in manufacturing. You can also tailor the sound chambers acoustically, which is what Shanling has done in the smaller teardrop-shaped shell.
The MG100 build quality is top-notch with deep glossy black coloring, which, while fingerprint-prone, does look stunning in a subdued manner.
A single vent hole is hidden on top of the faceplate, and the precise fitting of the two “halves” allows for the MMCX connection point to fit into its slot without issue.
The screw-in filter choices also function without bother, and I switched between the brass and stainless steel easily. Mounting any of the four choices of tips was fairly easy, and secure due to the quality craftsmanship and a good lip on the nozzle.
Performance:
When I heard the older ME100, I quickly discovered that Shanling was taking the build and sound of their IEMs seriously. Since then, Shanling has developed many new IEMs, most at a higher price.
The MG100 I like to think hearkens back to the company’s roots: quality sound and build at an affordable price.
Understanding that tip and filter choice change the signature, sometimes dramatically; the MG100 comes across with two distinct signatures, changed a bit by tip choice (as expected).
I found the bass-oriented (stainless steel) filter to indeed enhance the MG100 bass amount. The thumping bass did bleed into the mids, but not without control. I enjoyed the enhanced low-end and bass ear tips as well.
The brass filter (balanced) added distinct textural notes to the music, with better definition and clarity, which was missing with the bass filter. The ear tip choice was the same (bass tips), which made the change a bit more remarkable to me.
Compared to the KE4, the MG100 is much more energetic, with a thinner note quality. The midrange is pushed up and forward, almost too much in comparison. This has what I would consider a more “Far East” energy to it, and while it does not fit my tuning preferences, it still comes across as accurate.
I found the bass to be under tight control, more so than the KE4, but in less quantity. That note control carried across the spectrum, making the MG100 sound a bit more accurate, but with thinner note qualities to it. I will admit I prefer the KE4 to the MG100 after listening extensively.
QoA Aviation ($199)
Courtesy of my Headfonics review
Aviation
The Aviation was the first QoA product I had heard, and I came away impressed by its full note, with adequate bass. I can see why many are impressed by the marque, and feel this is a very good competitor to the KE4.
Technical:
The QoA Aviation is a 4-driver per side universal IEM with a bulbous fitting shell. It houses one dynamic driver. (8mm, full range), and three balanced armatures (dual Knowles 32873 drivers for midrange and treble response, and one Knowles 33518 for the ultra-high frequency band).
The Aviation has a sensitivity of 118 dB @1kHz and a somewhat high (for an IEM) 39Ω impedance rating, but overall, it is a sensitive and fairly easy-to-drive IEM on paper.
Design:
The Aviation has a 3D-molded, printed shell smoothed by hand polishing. It comes in two stunning hand-painted colors, Mirage and Galaxy (our review sample). The typical conch nub is present to help fit inside your ear.
The three-piece unit fits together smoothly due to hand polishing. A vent hole is on the back side, as opposed to the inside, allowing the dynamic driver to breathe.
The silver nozzle has an ornate silver ring around the three-hole patterned sound tubes, which is the first I have seen. Those sound tubes are inset into a molded form and set inside the nozzle ring.
The overall design is as expected at this price. I had no trouble wearing the Aviation for long periods, even if the bulbous shape was a bit larger than I preferred. The unit stuck out slightly from my ears, but not by an unacceptable amount.
Performance:
The QoA Aviation presents a vibrant, smooth character with an even frequency response. A small peak at 3kHz gives resolve to the upper mid-region.
Another fairly steep peak at the 8kHz region (then drop) adds brilliance in the treble region but without too much peakiness or sparkle. The drop after the 8kHz peak makes for a vibrant, but not overly exuberant, signature.
To me, the tuning is very similar to the KE4 but with more of a veiled sound. The bass is under better control to me as well, without carrying into the lower mids, which may fit some tastes better. The KE4 comes across as smoother overall, but the Aviation has an organic feel to it, which seems slightly more detailed. I cannot say I have a preference, other than there is a certain note of analytical artificial quality to the percussion instruments on the Aviation.
LetShuoer Cadenza 4 ($249)
Cadenza 4
I also came away impressed with the S15’s “little brother.” The full noted signature comes across with an energetic response, which makes for a pleasant, peppy listen.
Technical:
The Cadenza4 is a hybrid universal in-ear monitor using a 10mm dual-chambered beryllium-coated dynamic driver and 3 BA drivers.
The proprietary dynamic driver exhibits the qualities of being lightweight and exceptionally rigid. You get a mix of BA drivers, 1 from Sonion and 2 from Knowles using a series of 3D printed nanometer acoustic tubes combined with a 4-way electronic crossover.
The Cadenza4 has an impedance of 15Ω @1kHz and a sensitivity rating of 102 db/Vrms so it is quite an easy IEM to drive.
Design:
The Cadenza 4 is made from a 3D-printed resin, in a typical teardrop shape, with a larger nub to help with fit. A narrow nozzle helps with insertion, and the overall quality is good with three well-fitting parts. The faceplate shines in silver with the LETSHUOER logo in black on both the left and right sides. The Fit of the faceplate seems off, but when you feel for a gap between the shell and faceplate there isn’t one.
The shell fits nearly flush in my average-sized ears, with no discomfort, which led to long listening sessions. Thankfully there is a dedicated sheath for an ear hook, too. This made the cable lay in a much better position behind my ear, even wearing my reading glasses.
There are minor microphonics associated with the cable, but not as much as some in this category. The cable has a clear plastic rectangular cinch, which works quite well above the burnished silver Y-splitter. The two-wire cable contains 392 strands per cable of silver-plated monocrystalline copper.
As many companies are doing, there are three jacks included as mentioned above. Instead of sliding in, complete with a slot and having a screw cover; the Cadenza 4 only has the slide-in part. But I did not worry about it coming loose since the two parts fit together with good pressure.
The cable laid nicely when unwound, but it did take a bit to do so. I found that if you ran your hand down the cable as you unwound it, the shape immediately went straight.
Combine all of this, and I think the Cadenza 4 fits and functions very well.
Performance:
The Cadenza 4 sounds more towards the neutral part of the sound spectrum, with a natural uncolored feel to it, which departs from some of LETSHUOER’s previous offerings. While not bass-shy, it evenly presents both ends to make for that balanced signature. Think “just right” in the realm of Goldilocks.
There is no denying the full noted signature of the Cadenza 4. Coming through thick and layered, it may be too much for some. The bass hits fairly low but is under excellent control when compared to the KE4, but there seems to be a lack of vibrancy to it. The Cadenza 4 comes across as safe, without a lot of excitement comparatively.
I also note that tendency for an artificial quality to the percussion here, something that lacks an organic feel to it. Even though the KE4 sounds much more laidback, I preferred it due to what I might call a boring signature for the Cadenza 4, comparatively.
finale:
As stated above, this is my first encounter with the Kiwi Ears brand. I came away impressed with pretty much everything about the brand and the KE4. The low end comes across with gusto and bite, even if there is a slight bleed into the mids.
And to me, that midrange is the star. Vocals come across with sublime levels of clarity and detail in a thoroughly organic and accurate manner. Instruments in the same plane sound sumptuous in a complimentary fashion, making for an almost lusty quality to it.
While I do wish for a bit more bite up top and a further stretched treble note (which is odd for me to say since I prefer a more rolled-off top end), which might make this the best in class. As such, it is still at or near the top but misses that final polish.
Another way to look at that though, is the smooth laidback character compliments the midrange like not much else that is out. This is an IEM equally at home for the commute in the morning, giving you confidence as you start the day; or once you return for that sit down with your favorite single malt. The KE4 can fulfill both roles, without bother and that may be its best quality.
I thank Kiwiears for the opportunity to review one of their fine wares. I thoroughly enjoyed the listen and look forward to their future endeavors.
Cheers.
4.3 stars.
KE4
Intro:
This is the first model from Kiwi Ears that I have heard. Many have waxed about previous models, and I did come to appreciate what the company brought to the market with this model. I also realize some of the company's past iterations can be polarizing. This unit will be judged on its merits, alone. The unit is mine to keep as I see fit, but may be asked back for at any time. This unit will not be flipped after reviewing, as that is still really, REALLY uncool to do.
I thank Kiwiears for the opportunity to review the KE4 and look forward to more options in the future.
Specs:
Drivers: 2 Balanced Armatures, 2 Dynamic Drivers, 1 Knowles RAD-33518, 1 Customized RAB-32257
Driver Details: 1 Uitra-High Frequency Driver, 1 Mid-High Frequency Driver, 2 Low Frequency Drivers
Crossover: 3-Way Crossover Network
Sensitivity: 102dB (±1dB)
Impedance: 28 ohms
In The Box:
Kiwi Ears KE4
3.5mm se cable
Case
3x silicon tips
2x Nozzle filters
Gear Used/Compared:
Shanling MG100 ($159)
QoA Aviation ($199)
LetShuoer Cadenza 4 ($249)
HiBy R4
MBP/HiBy FD5
Music used:
Yes.
Unboxing:
The KE4 comes in a small, mostly square box with the venerable slide-off paperboard sleeve. With the IEM on the front, measurements on the side, and other information on the back, it is par for the course.
Taking the sleeve off and lifting the lid, you are presented with a protective foam/paperboard cradle housing the IEMs. Underneath, the case carries the cable, tips, and nozzle filters.
There is nothing special about it, but I like the efficiency of the packaging.
Design/Tech details:
The bass is handled by dual dynamic drivers, while the midrange and lower treble use a customized RAB-32257 balanced armature driver. A Knowles RAD-33518 balanced armature driver carries the upper treble region, rounding out the four drivers per side.
A 3-way crossover network ties the drivers together, which also operate via three independent sound tubes.
The larger black shells carry a silver faceplate on the back, along with a nib on the inside. There is also a grated vent hole for the dual dynamic drivers, which you could theoretically apply to the nozzle filters. Since four are included, you could vary the amount of bass by covering the vent hole, nozzle, or both.
Some say the fit is exceptional. I found it a tad big for my ears, and the nib to be a bit big. I would have preferred a smaller nib, which I believe could have countered the larger size, and pressure I felt when wearing for long sessions.
The 2-pin connection is tight, and one must take care when connecting the cables, but once done, microphonics are non-existent, and isolation was excellent using the included medium tips. I found no driver flex upon inserting either, as some have noted in their reviews.
The molded resin shells, combined with the flexible, pliable cable, make for an understated IEM, that could bely what follows.
Sound Impressions:
Listening impressions were made on the HiBy R4 and MBP/HiBy FD5 combinations, along with the Cayin N6ii, A01 motherboard.
Summary:
Some have labeled the KE4 as open with a more neutral signature, while others mention a smoother, bass-oriented signature. Tip choice plays a part in this, but the signature is not neutral to me other than the fairly smooth sound graphs that many produce. I find the good bass bleeds into the lower mids, which can either enhance or hinder your experience whether you like that or not. To me, the mids are the star, and this hinders slightly, but the bass quality is such that it can also be a positive.
Timbre:
As mentioned above, many find the sound neutral, with a smooth character that promotes a bit of warmth. I do find there is some warmth to the signature, but the bass overrides the neutral character to me. The dual dynamic driver allows the low end to shine with a good thump. The midbass is full and robust, mimicking the “Harmon target,” which, in this case, I like. The bulbous feel to it allows that thump to drive the foundation without promoting too much into the lower midrange.
The tight control of that bass in a speedy attack and decay allows the lower mids to shine. I find this to be the best part of the signature, as others have mentioned (there are many parts in which we agree). Vocal treatment is especially good here, as are acoustic guitar sounds in this range. Again, the word control comes to mind, which may seem a bit antithetical to the warmer signature. At least in my mind.
The natural character of the whole midrange is one of the best I have heard of late, and never did I tire of listening at multiple volume levels. That warmth in the upper midrange may not be to everyone’s liking, but for me, it hits all of the sweet spots in warmth, and a lack of intrusion upon my listening enjoyment.
The 3-6 kHz region is elevated, and some will not like this hit, but to me, it promotes the movement into the lower treble regions without becoming gritty or too obtuse. That said, female vocals in this region can come off slightly harsh, but I make it a point to listen to the whole signature without focusing on any seemingly short temperamental discrepancies. Some will like that fuller note of female vocals and the weight that grit provides. I am one of those who do.
There is a push in the upper treble, which mimics the push down low, making for a more U-shaped signature than a tighter V-shaped one. This leads to the smoother, more laidback character of the overall signature to me.
A term thrown around, which I was not previously aware of, is “new meta” in IEM tuning, which adds to the midrange tuning, moving slightly away from the typical Harman Target. What I find here is that the midrange is sumptuous to me, while the “more typical” high and low tuning affords a coherent overall signature. I am a fan of not using the Harman Target as a choice, especially since I prefer a warmer signature. And in that regard, the KE4 matches my preferences.
Staging & Dynamics:
With a smoother signature IEM, you run the risk of not having clearly defined layers, which can hinder transient response across the spectrum. The KE4 does suffer in that regard, but I find the melding of those layers as complimentary to each other as opposed to separating. Since the character, to me, is slightly smoother, it is natural to have less differentiation in the layers, presenting a more thoroughly mixed signature than defined layers.
This hurts in defining the exact placing of instruments, but again, I look at the overall signature as opposed to the individual parts. If a more analytically accurate signature is what you want, then you should probably look elsewhere. The KE4 is about musicality across the three dimensions, and it does so with aplomb.
Griffin Silver in his excellent review of the KE4 for Headphones.com mentioned this regarding soundstage: “Now, spaciousness or “soundstage” are very subjective qualities. Even if we hear the tone fairly similarly between us, we’re not guaranteed to unpack the same features the exact same way. For example, instead of perceiving a difference between tonal regions as “distance,” I could very well see a listener perceiving this kind of tone as just “claustrophobic due to excess lower midrange, or a deficit in the upper midrange.” That said, KE4 struck me as one of the more spacious IEMs I’ve tried, so if you’re the kind of listener that cares about that, KE4 might end up being a good choice for that.”
I have to agree with this assessment and understand the necessity of quantifying soundstage for listeners. We hear things differently, and perceive “distances” of stage differently, too. As such, I agree that the KE4 presents itself as
Pairings:
The KE4 paired easily with everything I tried, from my MBP to the HiBy R4 and FD5 (tethered to my MBP). It also worked well with my older Cayin N6ii.
I never felt a lack of power using any sources, and the sound coming through matched my observations above. I also wouldn’t say there was a single favorite of mine, which means it scales quite well across sources.
Select Comparisons:
Shanling MG100 ($159)
Courtesy of my Headfonics review
MG100
When I reviewed the MG100, it was a step back in the right direction for Shanling, one of my favorite companies. I also felt the price point was quite good, too, making for a very good listen. Much of what is listed below comes straight from my Headfonics review but with added comparisons between the MG100 and KE4.
Technical:
The Shanling MG100 uses a 10mm dynamic driver and HCCAW voice coil with a lightweight temperature-resistant ceramic diaphragm enclosed within a dual magnet design.
Instead of the MG800’s titanium, the MG100 reverts to a 7000-series aluminum carved on a 5-axis CNC machine for the sound chamber.
The MG100 is rated for an impedance of 16Ω and sensitivity of 113+/-3 dB @1kHz making it an easy-to-drive IEM out of most sources, be it a dongle or a DAP.
Add in two filter choices in brass for a balanced/universal sound or stainless steel for a bassy engaging signature, and the MG100 has the additional benefit of being able to offer two distinct sound signatures.
Design:
One good thing I know about metal is that 6000-series and 7000-series aluminum are light and easy to work with. This means it is perfect for the housing on the MG100.
Using 5-axis CNC machining for precise shaping, the aluminum allows for consistency in manufacturing. You can also tailor the sound chambers acoustically, which is what Shanling has done in the smaller teardrop-shaped shell.
The MG100 build quality is top-notch with deep glossy black coloring, which, while fingerprint-prone, does look stunning in a subdued manner.
A single vent hole is hidden on top of the faceplate, and the precise fitting of the two “halves” allows for the MMCX connection point to fit into its slot without issue.
The screw-in filter choices also function without bother, and I switched between the brass and stainless steel easily. Mounting any of the four choices of tips was fairly easy, and secure due to the quality craftsmanship and a good lip on the nozzle.
Performance:
When I heard the older ME100, I quickly discovered that Shanling was taking the build and sound of their IEMs seriously. Since then, Shanling has developed many new IEMs, most at a higher price.
The MG100 I like to think hearkens back to the company’s roots: quality sound and build at an affordable price.
Understanding that tip and filter choice change the signature, sometimes dramatically; the MG100 comes across with two distinct signatures, changed a bit by tip choice (as expected).
I found the bass-oriented (stainless steel) filter to indeed enhance the MG100 bass amount. The thumping bass did bleed into the mids, but not without control. I enjoyed the enhanced low-end and bass ear tips as well.
The brass filter (balanced) added distinct textural notes to the music, with better definition and clarity, which was missing with the bass filter. The ear tip choice was the same (bass tips), which made the change a bit more remarkable to me.
Compared to the KE4, the MG100 is much more energetic, with a thinner note quality. The midrange is pushed up and forward, almost too much in comparison. This has what I would consider a more “Far East” energy to it, and while it does not fit my tuning preferences, it still comes across as accurate.
I found the bass to be under tight control, more so than the KE4, but in less quantity. That note control carried across the spectrum, making the MG100 sound a bit more accurate, but with thinner note qualities to it. I will admit I prefer the KE4 to the MG100 after listening extensively.
QoA Aviation ($199)
Courtesy of my Headfonics review
Aviation
The Aviation was the first QoA product I had heard, and I came away impressed by its full note, with adequate bass. I can see why many are impressed by the marque, and feel this is a very good competitor to the KE4.
Technical:
The QoA Aviation is a 4-driver per side universal IEM with a bulbous fitting shell. It houses one dynamic driver. (8mm, full range), and three balanced armatures (dual Knowles 32873 drivers for midrange and treble response, and one Knowles 33518 for the ultra-high frequency band).
The Aviation has a sensitivity of 118 dB @1kHz and a somewhat high (for an IEM) 39Ω impedance rating, but overall, it is a sensitive and fairly easy-to-drive IEM on paper.
Design:
The Aviation has a 3D-molded, printed shell smoothed by hand polishing. It comes in two stunning hand-painted colors, Mirage and Galaxy (our review sample). The typical conch nub is present to help fit inside your ear.
The three-piece unit fits together smoothly due to hand polishing. A vent hole is on the back side, as opposed to the inside, allowing the dynamic driver to breathe.
The silver nozzle has an ornate silver ring around the three-hole patterned sound tubes, which is the first I have seen. Those sound tubes are inset into a molded form and set inside the nozzle ring.
The overall design is as expected at this price. I had no trouble wearing the Aviation for long periods, even if the bulbous shape was a bit larger than I preferred. The unit stuck out slightly from my ears, but not by an unacceptable amount.
Performance:
The QoA Aviation presents a vibrant, smooth character with an even frequency response. A small peak at 3kHz gives resolve to the upper mid-region.
Another fairly steep peak at the 8kHz region (then drop) adds brilliance in the treble region but without too much peakiness or sparkle. The drop after the 8kHz peak makes for a vibrant, but not overly exuberant, signature.
To me, the tuning is very similar to the KE4 but with more of a veiled sound. The bass is under better control to me as well, without carrying into the lower mids, which may fit some tastes better. The KE4 comes across as smoother overall, but the Aviation has an organic feel to it, which seems slightly more detailed. I cannot say I have a preference, other than there is a certain note of analytical artificial quality to the percussion instruments on the Aviation.
LetShuoer Cadenza 4 ($249)
Cadenza 4
I also came away impressed with the S15’s “little brother.” The full noted signature comes across with an energetic response, which makes for a pleasant, peppy listen.
Technical:
The Cadenza4 is a hybrid universal in-ear monitor using a 10mm dual-chambered beryllium-coated dynamic driver and 3 BA drivers.
The proprietary dynamic driver exhibits the qualities of being lightweight and exceptionally rigid. You get a mix of BA drivers, 1 from Sonion and 2 from Knowles using a series of 3D printed nanometer acoustic tubes combined with a 4-way electronic crossover.
The Cadenza4 has an impedance of 15Ω @1kHz and a sensitivity rating of 102 db/Vrms so it is quite an easy IEM to drive.
Design:
The Cadenza 4 is made from a 3D-printed resin, in a typical teardrop shape, with a larger nub to help with fit. A narrow nozzle helps with insertion, and the overall quality is good with three well-fitting parts. The faceplate shines in silver with the LETSHUOER logo in black on both the left and right sides. The Fit of the faceplate seems off, but when you feel for a gap between the shell and faceplate there isn’t one.
The shell fits nearly flush in my average-sized ears, with no discomfort, which led to long listening sessions. Thankfully there is a dedicated sheath for an ear hook, too. This made the cable lay in a much better position behind my ear, even wearing my reading glasses.
There are minor microphonics associated with the cable, but not as much as some in this category. The cable has a clear plastic rectangular cinch, which works quite well above the burnished silver Y-splitter. The two-wire cable contains 392 strands per cable of silver-plated monocrystalline copper.
As many companies are doing, there are three jacks included as mentioned above. Instead of sliding in, complete with a slot and having a screw cover; the Cadenza 4 only has the slide-in part. But I did not worry about it coming loose since the two parts fit together with good pressure.
The cable laid nicely when unwound, but it did take a bit to do so. I found that if you ran your hand down the cable as you unwound it, the shape immediately went straight.
Combine all of this, and I think the Cadenza 4 fits and functions very well.
Performance:
The Cadenza 4 sounds more towards the neutral part of the sound spectrum, with a natural uncolored feel to it, which departs from some of LETSHUOER’s previous offerings. While not bass-shy, it evenly presents both ends to make for that balanced signature. Think “just right” in the realm of Goldilocks.
There is no denying the full noted signature of the Cadenza 4. Coming through thick and layered, it may be too much for some. The bass hits fairly low but is under excellent control when compared to the KE4, but there seems to be a lack of vibrancy to it. The Cadenza 4 comes across as safe, without a lot of excitement comparatively.
I also note that tendency for an artificial quality to the percussion here, something that lacks an organic feel to it. Even though the KE4 sounds much more laidback, I preferred it due to what I might call a boring signature for the Cadenza 4, comparatively.
finale:
As stated above, this is my first encounter with the Kiwi Ears brand. I came away impressed with pretty much everything about the brand and the KE4. The low end comes across with gusto and bite, even if there is a slight bleed into the mids.
And to me, that midrange is the star. Vocals come across with sublime levels of clarity and detail in a thoroughly organic and accurate manner. Instruments in the same plane sound sumptuous in a complimentary fashion, making for an almost lusty quality to it.
While I do wish for a bit more bite up top and a further stretched treble note (which is odd for me to say since I prefer a more rolled-off top end), which might make this the best in class. As such, it is still at or near the top but misses that final polish.
Another way to look at that though, is the smooth laidback character compliments the midrange like not much else that is out. This is an IEM equally at home for the commute in the morning, giving you confidence as you start the day; or once you return for that sit down with your favorite single malt. The KE4 can fulfill both roles, without bother and that may be its best quality.
I thank Kiwiears for the opportunity to review one of their fine wares. I thoroughly enjoyed the listen and look forward to their future endeavors.
Cheers.
KIWI EARS KE4
The META of Low Contrast Sound.
Pros:
- Mid/Vocal-centric tuning.
- Smooth treble response
- Spacious head-stage.
- Laid-back, smooth experience.
- Well-built, light and comfortable to wear.
Cons:
- Picky on source.
- Bass quality could be better.
- Treble could use with more bite.
- Detail-retrieval is not its forte.
- No 4.4 BAL cable option.
[MY PERSONAL HEAD-FI GRADING]
1 ★ - Appalling! please avoid this! (1-3/10)
2 ★★ Subpar offering, there are better options out there! (4-5/10)
3 ★★★ Decent with some caveats! Not a bad pick! (6-7/10)
4 ★★★★ Not perfect but solid choice ! This should be in your shortlist. A nice addition to your collection. (8-9/10)
5 ★★★★★ One the best in class! You should go right ahead & buy one! A must have! (10/10)
▓▒░ SOUND-SIGNATURE ░▒▓
It has a laid-back, low-contrast sound. The bass, mid-range/vocal and treble sounds almost equally as loud/forward. The mid-range has ever so slightly better focus in the mix. The bass presence is not much while the treble extension is well-extended. Depending on pairings, it can go from neutral to neutral-bright.
▓▒░ PRE-BURN IN EXPERIENCE ░▒▓
For the 1st minute, the bass sounds a tad too boomy while the treble is rather sharp and hazy. And the vocals sounded dry and a tad hasher on transient. After 200 hours of running in, it sounds way more musical.
▓▒░ BASS/LOW-ENDSOUND ░▒▓
- Oddly enough, the perceived bass is alot less than the measurement would suggest. Multiple ear-tips has been swapped but the result is quite consistent. There is not much quantity to be squeezed out.
- The sub-bass presence is expectedly mild. The rumbling sensation is there but it is not very atmospheric. It just fades in and out very swiftly without leaving much trace behind. Sub-bass kick has a softer edge to it, lacking that tactile boom that we love.
- Bass distortion element is not the clearest. Bass-drop and ghetto bass replay are acceptable.
- Mid to upper bass presence is more or less the same. The tempo is perhaps just as fast, but the attack it carries is seemingly more impactful. It sounds slightly thicker and hits deeper in comparison to the subs, making punch and slam on percussions more rewarding to listen to.
- Overall, the bassline performance may not be the best for it's price-point. When it comes to bass quality, it could be better. It just falls short in terms of dynamics, detailing and control just a touch.
▓▒░ MID-RANGE /VOCAL ░▒▓
- It does stands out as a more mid-centric set. In a sense that you'll hear vocals and instrument that lives within more prominently.
- The added brilliance coming from the highs, gives its vocal a good level of transparency and clarity. The voice has this crispy and airy texture to them which is good for monitoring purposes.
- Both male and female seems to deliver nigh equal level of performance on stage. They don't seem to overpower each other that much on duet. The intonation of the voice is good. It has adequate amount of energy from low to upper-reach of the voice-range. There is no such thing as shoutiness or graininess on vocal transient, that could affect its refinement.
- This brings it to the downside. On some occasion, the low contrast pinna-gain combined with that enhanced treble, do come at the expense of vocals sounded leaner and sharper than they should. If and only the lower-harmonics could provide enough warmth and body, the mid-range wouldn't lose its euphony that much.
- Which means, male vocal can come across a tad thinner or too sharp and too airy on transient. Meanwhile female vocal could use with abit more energy up top to sound livelier.
- Instrument attack on piano, guitar, flute, strings are on the blunt side. Again, due to its tonality, they can sound rather flat, lacking note weight and fundamental body.
- To my ears, the overall timbre of the mid-range still come across as being natural. And despite my criticisms, I still think that it is one of the better mid-centric hybrids in its price-range.
▓▒░ TREBLE/HIGHS ░▒▓
- The treble delivery has good amount brilliance and air extension which gives openness to the stage. Its response fairly even and smooth. It’s got none of that unwanted resonance with minimal peaks and troughs. Sibilance control is good with almost zero grain issue is heard.
- If I were to nit-pick, the treble though sounded crispy, it is not that crunchy. The attack just lacking a touch of bite. The note-hits are on the light-side. As a result, treble elements can sound less define, lacking contrast that it needs.
- One important thing to note, on brighter pairings, those tizzy sensation that comes from the mid to upper treble region can be distracting. It is even more apparent when the tracks have constant hi-hats and cymbals or constant electronic zinging, buzzing and rattling. Those elements will tend to bleed or mask onto the mid-range, making vocals sound unpleasant. As a result, on highly energetic treble music, it can get quite fatiguing which can be a major deal-breaker to those treble-sensitive folks. Oddly enough, E-guitar elements played just fine regardless.
- If you're facing one of these issues, please do check your source which is worth mentioning.
- In short, the treble can be on the brighter side for some, and it is not the most well-define treble in its class. Having said that, with the right synergy, it can sound quite pleasant.
✧ ════ •TECHNICAL PERFORMANCE• ════ ✧
- The STAGE sounds rather open and spacious. It is quite wide, and the headroom is surprisingly tall. And the depth is pretty good too. Vocal placement is well-centralized without being too forward on the stage, while instruments and background elements are nicely placed as it should.
- IMAGING PROWESS is decent by todays standard. The transition of sound between channel is done smoothly without stuttering or jittering. Sound projection though accurate, are not the sharpest in its competitors.
- It's LAYERING AND SEPARATION is pretty good for a low-contrast sound. Yes, the background is not pitch black and because of that, the separated elements doesn't have the clearest of cut. But thanks to the stage dimension, the gap between each element of sound is more than ample. Which mean compression and congestion issue is not going to be an issue. More importantly, the separation level is kept consistent throughout the test even under heavy load.
- RESOLUTION wise, it is average. For its price-point, any planar could potentially out-performed it in terms of micro and macro details. But in all fairness, it is not severely lacking.
- Out for the box, due to its tuning, it is never going to be a DYNAMIC set. The overall attack is on the compress side making elements of loud and soft less distinguishable.
- As for its TONE AND TIMBRE, to my ears, it is not the most accurate but in terms of naturalness, it doesn't sound too digital-like. Overall, the notes just lack that sense of body and the element of reverb to sound more realistic. It is more forgiving on vocal playback but on instruments replay, it is quite noticeable.
- Talk about VOLUME SCALLING. Again, it is average. Sure, with the right synergy, you could crank it up to mid-high volume. Still, dialing it up too high, the bass and treble can sound abit much, overpowering the vocals.
- As for the DRIVER QUALITY. Its more than capable to achieve its goal. There is no driver-flex issue and it is not that hard to drive to listenable volume but they do perform better with greater AMP.
✧ ════ •POTENTIAL SYNERGY TWEAKS• ════ ✧
- EARTIPS : I’d say, ditch the stock eartips. As it tends to emphasize the treble zings and reduce the bass presence even more. I just stick with SPINFIT CP100, it helps with the bass body and vocal intimacy.
- DAC/AMP: As mentioned on the "treble" section, It is a tricky one. If the DAC doesn't have a good bass control, the KE-4 lows will start to sound loose and boomy. On the other hand, if the DAC has a greater treble emphasis, those constant hi-hats and cymbals or electronics will start to get distracting. So, it's about finding the right synergy to compensate its bass quality and treble presence. In my case, I just stick with Tanchjim SPACE on “Low-Latency, Slow-Decent” mode. It doesn't sound too bright or sharp with a slight low-end warmth emphasis. The Ibasso DC07PRO (Slow-Roll-off Mode) is another neutral-warmish source that pairs well with the KE-4. Its sounds fuller, smoother with abit more air up-top.
✧ ════ •BUILD/ PACKAGING/COMFORT• ════ ✧
- The build quality is more than good enough. The design is very minimalist with cool looking faceplate.
- For 200$ USD the packaging could be better. There is no 4.4 BAL option which questionable in today's market. It provides 3 sets of Kiwi Ears Flex Silicone eartips, sizes from S to L size, 2 sets of replaceable filters with decent small carrying case. The overall unboxing experience is pretty mundane.
- Comfit wise, with right ear-tips, it is comfortable enough for long sessions. Smaller ears might want to use a smaller set of ear-tips to get the best fit.
QUICK HEAD-2-HEAD
vs Tanchim PRISM x Yongse Treasure 4.4 BAL x Spinfit CP100 (M)
This may not be a fair comparison when it comes to pricing but it is the only 1-DD-2BA hybrid that I have to compare with..
PRISM is definitely bassier and more sub-bass oriented. The bass reproduction sounds more natural and realistic. When it comes to dynamic, tactile, decay, pressure, sustain and layering, it is leagues above.
KE4 is the most mid-centric of the two. The mid-range/vocals will always be the highlight. But for some reason, the PRISM is better at capturing the emotional of vocals. The intonation to the voice is more accurate. The notes are heftier with greater presence of reverb.
KE4 seems to have better treble extension. It sounds air-er and brighter from mid to upper treble. But the PRISM offers more bite. High frequency percussions like hi-hats and cymbals have a metallic shimmer while electronic zings have a nicer ring to them.
KE-4 staging sounds more open. The width is nigh identical, but the headroom is more generous with slightly better depth. The PRISM will sound more intimate and holographic by comparison.
Imaging prowess on the PRISM is a notch higher. Its more accurate and much sharper when it comes to sound projection between channels.
When it comes to separation level, the border between each element of sound on the PRISM has a clearer cut thanks to its imaging ability and darker background but on a busier tracks, the KE-4 is more consistent, whereas the PRISM tend to struggle depending on mastering quality.
PRISM has slightly upper hand when it comes to retrieving micro and macro detail.
Overall timbral accuracy goes to PRISM. The attack is wider, the decay rate is more precise, it has better note-weight and the presence of reverb is not missing that much. The end-to-end of notes sounded more complete. Instrument just sounds more realistic by comparison.
The build quality on the PRISM is next level. It is very jewellery-like. It is cold to the touch with exceptional craftsmanship. But when it comes to comfort, the KE-4 might better overall. It is lighter and with its semi-custom resin style makes its more versatile for most ears.
When it comes to value, this 3 years old PRISM does not come cheap. And performance wise, the KE-4 just offers better value.
" The PRISM is definitely more fun, and it is beautifully made. But it is very expensive. However, if vocals is your priority and you appreciate a more laid-back experience, then the KE-4 is more than enough."
◤FINAL THOUGHTS◢
The KE-4 that is not going to suit everyone. Just getting the right synergy alone is quite tricky because this sort of low-contrast tuning is very easily off-set by the source tuning. But once you get it right, you will start to see why people likes it. To the contrary, you can understand why people hate it. I was lucky enough to assess the KE-4 long enough to find the right synergy, just to experience its potential. If you're expecting a dynamic bass and engaging treble response, the KE-4 is not going to be it. But if your library consists of vocal content first, then the KE-4 might be just for you. As for myself, it does grow on me the longer I listen to it which is a good sign.
[IEM-SCORING-BOARD]
RATING
1: Trash (F)
2: Horrible (E)
3: Bad (D)
4: Subpar (C)
5: Decent/Average (B)
6: Good (A-)
7: Great (A)
8: Superb. (A+)
9: Masterclass/Top-Drawer (S)
10: Perfection (P)
KIWI EARS KE4 (2024)
[3-CO : 2-DD-2-BA]
(2 Kiwi Ears custom 10mm dynamic driver)
(1 RAB 32257 BA BALANCED ARMATURE)
(1 RAB RAD 33518BA BALANCED ARMATURE)
MSRP : 199$ USD
Tuning : Neutral/Neutral-Bright
= Quality =
Bass: 5.5/10 Mids: 5.5/10 Treble: 5.5/10
Male/Female: 5.5/5.5
= Technicalities =
Detail & Resolve: 5.5/5.5
Instrument Replay/Timbre : 5.5/10
Dynamic-Range/Transient : 5.5/10
Head-stage [W-H-D]: 7.0-7.0-7.0
Layering & Separation: 6.5/10
Stereo Imaging 6.0/10
Ambience : 5/10
Clarity : 6.5/10
Build/Comfort: 6/8
Value: 7/10 [AS TESTED]
Personal Enjoyment: 6.0/10
SETUP (As tested)
Stock Cable 3.5 SE PLUG
Spinfit CP100 (M) (Non-Plus)
Tanchjim SPACE/ Ibasso DC07 Pro.
Tanchjim PRISM (2021)
[3-CO : 1-DD-2-BA]
MSRP : 600$ USD
Tuning : Warm-Harman
= Quality =
Bass: 8.0/10 Mids: 6.0/10 Treble: 6.0/10
Male/Female: 6.0/6.0
= Technicalities =
Detail & Resolve: 6.5/6.0
Instrument Replay/Timbre : 7.0/10
Dynamic-Range/Transient : 7.5/10
Head-stage [W-H-D]: 7.0-6.0-6.5
Layering & Separation: 6.0/10
Stereo Imaging 7.5/10
Ambience : 8/10
Clarity : 7.0/10
Build/Comfort: 10/7
Value: 2/10 [AS TESTED]
Personal Enjoyment: 8.0/10
SETUP (As tested)
Yongse Treasure 4.4 BAL
Spinfit CP100 (M) (Non-Plus)
Tanchjim SPACE/ Ibasso DC07 Pro.
========================================================================
【SOURCE & GEARS】
● Native FLAC Files [44.1Khz 16bits-96Khz 24bits]
● Foobar2000 [ROG G18] [USB C Thunderbolt]
● Huawei P20 PRO [Phone][ App- Foobar2000]
========================================================================
1982 Chicago – Hard to say I'm sorry. ★
2003 NARUTO Original Soundtrack I – Wakiagaru Toushi ★
2008 K.will (케이윌) – 소원 (Great King Sejong OST Part.1)
2009 Maksim – Exodus
2010 Ichiban Ushiro no Daimaou (OST) – Kokoro no Oku De Ha
2014 Grabbitz – Here with you now. ★
2014 BoA – MASAYUME CHASING
2014 Hyolyn – 안녕 Good bye ★
2015 KOKIA – I Found You ★
2015 K MISSING KINGS (OST) - New Kings
2016 K RETURN OF KINGS (OST) - Return of Kings
2016 K RETURN OF KINGS (OST) - If you die.
2017 Berry Goodman – Zutto (ずっと) ★
2017 SawanoHiroyuki[nZk]:mizuki – ViEW
2017 Namie Amuro – Hope
2019 K SEVEN STORIES (OST) - In Pursuit Of
2019 K SEVEN STORIES (OST) - Lost Small World
2019 Blade & Soul (OST) – Half-Moon Lake
2019 CAROLE & TUESDAY VOCAL COLLECTION Vol.1 – Light a Fire ★
2020 Paradox Live Opening Show (1st E.P) – BAE – BaNG!!! ★
2020 Paradox Live Opening Show (1st E.P) – cozmez – Where They At ★
2020 倖田來未 (Kumi Koda) – GET NAKED (Kiyoshi Sugo Remix)
2020 倖田來未 (Kumi Koda) – again (MATZ Remix)
2020 premiere fleurs – プリンシパル
2020 Love Live! Nijigasaki – 朝香果林 (Karin Asaka) – VIVID WORLD ★
2020 Fujii Kaze – へでもねーよ”／Hedemo Ne-YoSeishun Sick
2020 King Gnu – 三文小説 ／Sanmon Shosetsu ★
2021 OWV – Fifth Season ★
2021 加藤 ミリヤ (Miliyah) feat. Yoshida Brothers – この夢が醒めるまで ★
2021 Aoi Teshima – ただいま★
2021 Official髭男dism – Cry Baby
2021 Chanmin BIJIN 美人 – Morning Mood
2021 門脇更紗 (Sarasa Kadowaki) – きれいだ
2021 Mirei Touyama – 美忘録
2021 SELECTION PROJECT Vol.1 – Only one yell -天沢灯ソロver.- ★
2022 Belle (Original Motion Picture Soundtrack) – Million Miles Away (ENG vers.)
2022 rei (E-girls) – Dark Hero.
2022 rei (E-girls) – IDNY
2022 I can fly (Special Edition) – Bleecker Chrome - You will shine ★
2022 I can fly (Special Edition) – YOSHIKI EZAKI x Bleecker Chrome - UP ★
2022 BEAST TAMER (OST) – じんわり感じている幸せ
2022 Ado – 会いたくて
2022 Ado – 踊
2023 La prière – Sweet Dreams ★
2023 Bungou Stray Dogs 4th Season ED – Luck Life – しるし★
2023 UMAMUSUME PRETTY DERBY - Hat on your Head!
2023 Anna – 花のように (Hana no You ni)
2023 riria. – 貴方の側に (Anata no Soba ni)
2024 Dungeon Meshi OP – BUMP OF CHICKEN – Sleep Walking Orchestra
2024 Ernie Zakri, Ade Govinda - Masing Masing ★
2024 Paradox Live THE ANIMATION OST – 25 幻影武雷管 - Trauma ★
2024 Bartender Kami no Glass OP – Takaya Kawasaki – Stardust Memory ★
2024 Maou no Ore ga Dorei Elf ED – Sayaka Yamamoto – Blue Star
2024 Spice and Wolf Merchant Meets the Wise Wolf OP – Hana Hope – Tabi no Yukue/ Destination of the journey
2024 Tonari no Youkai-san ED – Aoi Kubo – Iro no Naka (風媒花)
★ Main-Test-Tracks/ A glimpse of what listen to 90% of the of time.
Do take my words for what it’s worth. Afterall, I am just one man. ╮(╯▽╰)╭
THANK YOU SO MUCH FOR READING! HAVE A GOOD DAY WHEREVER YOU ARE! TAKE CARE!
Disclaimer:
- This is a review unit sent by @EvelynZ (from kiwiears)
- Million thanks for making this possible. Looking forward to try more Kiwiears product in the future.
- If you like to purchase this, please click the link below (non-affiliated)
https://kiwiears.com/products/kiwi-ears-ke4
If you like me to review your gears, please do send me a message! I'll try to respond ASAP!
EXTRA PHOTOS
The META of Low Contrast Sound.
Pros:
- Mid/Vocal-centric tuning.
- Smooth treble response
- Spacious head-stage.
- Laid-back, smooth experience.
- Well-built, light and comfortable to wear.
Cons:
- Picky on source.
- Bass quality could be better.
- Treble could use with more bite.
- Detail-retrieval is not its forte.
- No 4.4 BAL cable option.
[MY PERSONAL HEAD-FI GRADING]
1 ★ - Appalling! please avoid this! (1-3/10)
2 ★★ Subpar offering, there are better options out there! (4-5/10)
3 ★★★ Decent with some caveats! Not a bad pick! (6-7/10)
4 ★★★★ Not perfect but solid choice ! This should be in your shortlist. A nice addition to your collection. (8-9/10)
5 ★★★★★ One the best in class! You should go right ahead & buy one! A must have! (10/10)
KIWI EARS KE4 4 ★★★★
▓▒░ SOUND-SIGNATURE ░▒▓
It has a laid-back, low-contrast sound. The bass, mid-range/vocal and treble sounds almost equally as loud/forward. The mid-range has ever so slightly better focus in the mix. The bass presence is not much while the treble extension is well-extended. Depending on pairings, it can go from neutral to neutral-bright.
▓▒░ PRE-BURN IN EXPERIENCE ░▒▓
For the 1st minute, the bass sounds a tad too boomy while the treble is rather sharp and hazy. And the vocals sounded dry and a tad hasher on transient. After 200 hours of running in, it sounds way more musical.
▓▒░ BASS/LOW-ENDSOUND ░▒▓
- Oddly enough, the perceived bass is alot less than the measurement would suggest. Multiple ear-tips has been swapped but the result is quite consistent. There is not much quantity to be squeezed out.
- The sub-bass presence is expectedly mild. The rumbling sensation is there but it is not very atmospheric. It just fades in and out very swiftly without leaving much trace behind. Sub-bass kick has a softer edge to it, lacking that tactile boom that we love.
- Bass distortion element is not the clearest. Bass-drop and ghetto bass replay are acceptable.
- Mid to upper bass presence is more or less the same. The tempo is perhaps just as fast, but the attack it carries is seemingly more impactful. It sounds slightly thicker and hits deeper in comparison to the subs, making punch and slam on percussions more rewarding to listen to.
- Overall, the bassline performance may not be the best for it's price-point. When it comes to bass quality, it could be better. It just falls short in terms of dynamics, detailing and control just a touch.
▓▒░ MID-RANGE /VOCAL ░▒▓
- It does stands out as a more mid-centric set. In a sense that you'll hear vocals and instrument that lives within more prominently.
- The added brilliance coming from the highs, gives its vocal a good level of transparency and clarity. The voice has this crispy and airy texture to them which is good for monitoring purposes.
- Both male and female seems to deliver nigh equal level of performance on stage. They don't seem to overpower each other that much on duet. The intonation of the voice is good. It has adequate amount of energy from low to upper-reach of the voice-range. There is no such thing as shoutiness or graininess on vocal transient, that could affect its refinement.
- This brings it to the downside. On some occasion, the low contrast pinna-gain combined with that enhanced treble, do come at the expense of vocals sounded leaner and sharper than they should. If and only the lower-harmonics could provide enough warmth and body, the mid-range wouldn't lose its euphony that much.
- Which means, male vocal can come across a tad thinner or too sharp and too airy on transient. Meanwhile female vocal could use with abit more energy up top to sound livelier.
- Instrument attack on piano, guitar, flute, strings are on the blunt side. Again, due to its tonality, they can sound rather flat, lacking note weight and fundamental body.
- To my ears, the overall timbre of the mid-range still come across as being natural. And despite my criticisms, I still think that it is one of the better mid-centric hybrids in its price-range.
▓▒░ TREBLE/HIGHS ░▒▓
- The treble delivery has good amount brilliance and air extension which gives openness to the stage. Its response fairly even and smooth. It’s got none of that unwanted resonance with minimal peaks and troughs. Sibilance control is good with almost zero grain issue is heard.
- If I were to nit-pick, the treble though sounded crispy, it is not that crunchy. The attack just lacking a touch of bite. The note-hits are on the light-side. As a result, treble elements can sound less define, lacking contrast that it needs.
- One important thing to note, on brighter pairings, those tizzy sensation that comes from the mid to upper treble region can be distracting. It is even more apparent when the tracks have constant hi-hats and cymbals or constant electronic zinging, buzzing and rattling. Those elements will tend to bleed or mask onto the mid-range, making vocals sound unpleasant. As a result, on highly energetic treble music, it can get quite fatiguing which can be a major deal-breaker to those treble-sensitive folks. Oddly enough, E-guitar elements played just fine regardless.
- If you're facing one of these issues, please do check your source which is worth mentioning.
- In short, the treble can be on the brighter side for some, and it is not the most well-define treble in its class. Having said that, with the right synergy, it can sound quite pleasant.
✧ ════ •TECHNICAL PERFORMANCE• ════ ✧
- The STAGE sounds rather open and spacious. It is quite wide, and the headroom is surprisingly tall. And the depth is pretty good too. Vocal placement is well-centralized without being too forward on the stage, while instruments and background elements are nicely placed as it should.
- IMAGING PROWESS is decent by todays standard. The transition of sound between channel is done smoothly without stuttering or jittering. Sound projection though accurate, are not the sharpest in its competitors.
- It's LAYERING AND SEPARATION is pretty good for a low-contrast sound. Yes, the background is not pitch black and because of that, the separated elements doesn't have the clearest of cut. But thanks to the stage dimension, the gap between each element of sound is more than ample. Which mean compression and congestion issue is not going to be an issue. More importantly, the separation level is kept consistent throughout the test even under heavy load.
- RESOLUTION wise, it is average. For its price-point, any planar could potentially out-performed it in terms of micro and macro details. But in all fairness, it is not severely lacking.
- Out for the box, due to its tuning, it is never going to be a DYNAMIC set. The overall attack is on the compress side making elements of loud and soft less distinguishable.
- As for its TONE AND TIMBRE, to my ears, it is not the most accurate but in terms of naturalness, it doesn't sound too digital-like. Overall, the notes just lack that sense of body and the element of reverb to sound more realistic. It is more forgiving on vocal playback but on instruments replay, it is quite noticeable.
- Talk about VOLUME SCALLING. Again, it is average. Sure, with the right synergy, you could crank it up to mid-high volume. Still, dialing it up too high, the bass and treble can sound abit much, overpowering the vocals.
- As for the DRIVER QUALITY. Its more than capable to achieve its goal. There is no driver-flex issue and it is not that hard to drive to listenable volume but they do perform better with greater AMP.
✧ ════ •POTENTIAL SYNERGY TWEAKS• ════ ✧
- EARTIPS : I’d say, ditch the stock eartips. As it tends to emphasize the treble zings and reduce the bass presence even more. I just stick with SPINFIT CP100, it helps with the bass body and vocal intimacy.
- DAC/AMP: As mentioned on the "treble" section, It is a tricky one. If the DAC doesn't have a good bass control, the KE-4 lows will start to sound loose and boomy. On the other hand, if the DAC has a greater treble emphasis, those constant hi-hats and cymbals or electronics will start to get distracting. So, it's about finding the right synergy to compensate its bass quality and treble presence. In my case, I just stick with Tanchjim SPACE on “Low-Latency, Slow-Decent” mode. It doesn't sound too bright or sharp with a slight low-end warmth emphasis. The Ibasso DC07PRO (Slow-Roll-off Mode) is another neutral-warmish source that pairs well with the KE-4. Its sounds fuller, smoother with abit more air up-top.
✧ ════ •BUILD/ PACKAGING/COMFORT• ════ ✧
- The build quality is more than good enough. The design is very minimalist with cool looking faceplate.
- For 200$ USD the packaging could be better. There is no 4.4 BAL option which questionable in today's market. It provides 3 sets of Kiwi Ears Flex Silicone eartips, sizes from S to L size, 2 sets of replaceable filters with decent small carrying case. The overall unboxing experience is pretty mundane.
- Comfit wise, with right ear-tips, it is comfortable enough for long sessions. Smaller ears might want to use a smaller set of ear-tips to get the best fit.
QUICK HEAD-2-HEAD
This may not be a fair comparison when it comes to pricing but it is the only 1-DD-2BA hybrid that I have to compare with..
PRISM is definitely bassier and more sub-bass oriented. The bass reproduction sounds more natural and realistic. When it comes to dynamic, tactile, decay, pressure, sustain and layering, it is leagues above.
KE4 is the most mid-centric of the two. The mid-range/vocals will always be the highlight. But for some reason, the PRISM is better at capturing the emotional of vocals. The intonation to the voice is more accurate. The notes are heftier with greater presence of reverb.
KE4 seems to have better treble extension. It sounds air-er and brighter from mid to upper treble. But the PRISM offers more bite. High frequency percussions like hi-hats and cymbals have a metallic shimmer while electronic zings have a nicer ring to them.
KE-4 staging sounds more open. The width is nigh identical, but the headroom is more generous with slightly better depth. The PRISM will sound more intimate and holographic by comparison.
Imaging prowess on the PRISM is a notch higher. Its more accurate and much sharper when it comes to sound projection between channels.
When it comes to separation level, the border between each element of sound on the PRISM has a clearer cut thanks to its imaging ability and darker background but on a busier tracks, the KE-4 is more consistent, whereas the PRISM tend to struggle depending on mastering quality.
PRISM has slightly upper hand when it comes to retrieving micro and macro detail.
Overall timbral accuracy goes to PRISM. The attack is wider, the decay rate is more precise, it has better note-weight and the presence of reverb is not missing that much. The end-to-end of notes sounded more complete. Instrument just sounds more realistic by comparison.
The build quality on the PRISM is next level. It is very jewellery-like. It is cold to the touch with exceptional craftsmanship. But when it comes to comfort, the KE-4 might better overall. It is lighter and with its semi-custom resin style makes its more versatile for most ears.
When it comes to value, this 3 years old PRISM does not come cheap. And performance wise, the KE-4 just offers better value.
" The PRISM is definitely more fun, and it is beautifully made. But it is very expensive. However, if vocals is your priority and you appreciate a more laid-back experience, then the KE-4 is more than enough."
◤FINAL THOUGHTS◢
The KE-4 that is not going to suit everyone. Just getting the right synergy alone is quite tricky because this sort of low-contrast tuning is very easily off-set by the source tuning. But once you get it right, you will start to see why people likes it. To the contrary, you can understand why people hate it. I was lucky enough to assess the KE-4 long enough to find the right synergy, just to experience its potential. If you're expecting a dynamic bass and engaging treble response, the KE-4 is not going to be it. But if your library consists of vocal content first, then the KE-4 might be just for you. As for myself, it does grow on me the longer I listen to it which is a good sign.
[IEM-SCORING-BOARD]
RATING
1: Trash (F)
2: Horrible (E)
3: Bad (D)
4: Subpar (C)
5: Decent/Average (B)
6: Good (A-)
7: Great (A)
8: Superb. (A+)
9: Masterclass/Top-Drawer (S)
10: Perfection (P)
KIWI EARS KE4 (2024)
[3-CO : 2-DD-2-BA]
(2 Kiwi Ears custom 10mm dynamic driver)
(1 RAB 32257 BA BALANCED ARMATURE)
(1 RAB RAD 33518BA BALANCED ARMATURE)
MSRP : 199$ USD
Tuning : Neutral/Neutral-Bright
= Quality =
Bass: 5.5/10 Mids: 5.5/10 Treble: 5.5/10
Male/Female: 5.5/5.5
= Technicalities =
Detail & Resolve: 5.5/5.5
Instrument Replay/Timbre : 5.5/10
Dynamic-Range/Transient : 5.5/10
Head-stage [W-H-D]: 7.0-7.0-7.0
Layering & Separation: 6.5/10
Stereo Imaging 6.0/10
Ambience : 5/10
Clarity : 6.5/10
Build/Comfort: 6/8
Value: 7/10 [AS TESTED]
Personal Enjoyment: 6.0/10
SETUP (As tested)
Stock Cable 3.5 SE PLUG
Spinfit CP100 (M) (Non-Plus)
Tanchjim SPACE/ Ibasso DC07 Pro.
Tanchjim PRISM (2021)
[3-CO : 1-DD-2-BA]
MSRP : 600$ USD
Tuning : Warm-Harman
= Quality =
Bass: 8.0/10 Mids: 6.0/10 Treble: 6.0/10
Male/Female: 6.0/6.0
= Technicalities =
Detail & Resolve: 6.5/6.0
Instrument Replay/Timbre : 7.0/10
Dynamic-Range/Transient : 7.5/10
Head-stage [W-H-D]: 7.0-6.0-6.5
Layering & Separation: 6.0/10
Stereo Imaging 7.5/10
Ambience : 8/10
Clarity : 7.0/10
Build/Comfort: 10/7
Value: 2/10 [AS TESTED]
Personal Enjoyment: 8.0/10
SETUP (As tested)
Yongse Treasure 4.4 BAL
Spinfit CP100 (M) (Non-Plus)
Tanchjim SPACE/ Ibasso DC07 Pro.
========================================================================
【SOURCE & GEARS】
● Native FLAC Files [44.1Khz 16bits-96Khz 24bits]
● Foobar2000 [ROG G18] [USB C Thunderbolt]
● Huawei P20 PRO [Phone][ App- Foobar2000]
========================================================================
【PLAYLIST／TEST-TRACKS】
1977 Fleetwood Mac - Dreams ★1982 Chicago – Hard to say I'm sorry. ★
2003 NARUTO Original Soundtrack I – Wakiagaru Toushi ★
2008 K.will (케이윌) – 소원 (Great King Sejong OST Part.1)
2009 Maksim – Exodus
2010 Ichiban Ushiro no Daimaou (OST) – Kokoro no Oku De Ha
2014 Grabbitz – Here with you now. ★
2014 BoA – MASAYUME CHASING
2014 Hyolyn – 안녕 Good bye ★
2015 KOKIA – I Found You ★
2015 K MISSING KINGS (OST) - New Kings
2016 K RETURN OF KINGS (OST) - Return of Kings
2016 K RETURN OF KINGS (OST) - If you die.
2017 Berry Goodman – Zutto (ずっと) ★
2017 SawanoHiroyuki[nZk]:mizuki – ViEW
2017 Namie Amuro – Hope
2019 K SEVEN STORIES (OST) - In Pursuit Of
2019 K SEVEN STORIES (OST) - Lost Small World
2019 Blade & Soul (OST) – Half-Moon Lake
2019 CAROLE & TUESDAY VOCAL COLLECTION Vol.1 – Light a Fire ★
2020 Paradox Live Opening Show (1st E.P) – BAE – BaNG!!! ★
2020 Paradox Live Opening Show (1st E.P) – cozmez – Where They At ★
2020 倖田來未 (Kumi Koda) – GET NAKED (Kiyoshi Sugo Remix)
2020 倖田來未 (Kumi Koda) – again (MATZ Remix)
2020 premiere fleurs – プリンシパル
2020 Love Live! Nijigasaki – 朝香果林 (Karin Asaka) – VIVID WORLD ★
2020 Fujii Kaze – へでもねーよ”／Hedemo Ne-YoSeishun Sick
2020 King Gnu – 三文小説 ／Sanmon Shosetsu ★
2021 OWV – Fifth Season ★
2021 加藤 ミリヤ (Miliyah) feat. Yoshida Brothers – この夢が醒めるまで ★
2021 Aoi Teshima – ただいま★
2021 Official髭男dism – Cry Baby
2021 Chanmin BIJIN 美人 – Morning Mood
2021 門脇更紗 (Sarasa Kadowaki) – きれいだ
2021 Mirei Touyama – 美忘録
2021 SELECTION PROJECT Vol.1 – Only one yell -天沢灯ソロver.- ★
2022 Belle (Original Motion Picture Soundtrack) – Million Miles Away (ENG vers.)
2022 rei (E-girls) – Dark Hero.
2022 rei (E-girls) – IDNY
2022 I can fly (Special Edition) – Bleecker Chrome - You will shine ★
2022 I can fly (Special Edition) – YOSHIKI EZAKI x Bleecker Chrome - UP ★
2022 BEAST TAMER (OST) – じんわり感じている幸せ
2022 Ado – 会いたくて
2022 Ado – 踊
2023 La prière – Sweet Dreams ★
2023 Bungou Stray Dogs 4th Season ED – Luck Life – しるし★
2023 UMAMUSUME PRETTY DERBY - Hat on your Head!
2023 Anna – 花のように (Hana no You ni)
2023 riria. – 貴方の側に (Anata no Soba ni)
2024 Dungeon Meshi OP – BUMP OF CHICKEN – Sleep Walking Orchestra
2024 Ernie Zakri, Ade Govinda - Masing Masing ★
2024 Paradox Live THE ANIMATION OST – 25 幻影武雷管 - Trauma ★
2024 Bartender Kami no Glass OP – Takaya Kawasaki – Stardust Memory ★
2024 Maou no Ore ga Dorei Elf ED – Sayaka Yamamoto – Blue Star
2024 Spice and Wolf Merchant Meets the Wise Wolf OP – Hana Hope – Tabi no Yukue/ Destination of the journey
2024 Tonari no Youkai-san ED – Aoi Kubo – Iro no Naka (風媒花)
★ Main-Test-Tracks/ A glimpse of what listen to 90% of the of time.
Do take my words for what it’s worth. Afterall, I am just one man. ╮(╯▽╰)╭
THANK YOU SO MUCH FOR READING! HAVE A GOOD DAY WHEREVER YOU ARE! TAKE CARE!
Disclaimer:
- This is a review unit sent by @EvelynZ (from kiwiears)
- Million thanks for making this possible. Looking forward to try more Kiwiears product in the future.
- If you like to purchase this, please click the link below (non-affiliated)
https://kiwiears.com/products/kiwi-ears-ke4
If you like me to review your gears, please do send me a message! I'll try to respond ASAP!
EXTRA PHOTOS
Kiwi Ears KE4 Review
Full Review can be found HERE
Kiwi Ears KE4 Review
Intro
Today I have with me the Kiwi Ears KE4 from the fine audio brand Kiwi Ears. I’m a hair later to the party with this set but I am more than happy to get to speak on the KE4 and experience what it’s all about. The KE4 comes in with an MSRP of around $199 and sits nestled in one of the more competitive price points within the Audioverse. Now, the KE4 is a fairly ambitious iem from Kiwi Ears as the slick looking shells house two dynamic drivers and two balanced armature drivers and comes with the latest New Meta tuning. I suppose my first question will center around the implementation of those drivers as well as the overall tuning, and how the KE4 fits within the current market. Lately we’ve been inundated with copy-cat style tunings. Yet somehow, I think the KE4 is fairly unique in how Kiwi Ears went about tuning the KE4. I suppose we shall see, but if earlier New Meta tuned sets are any indication than this one will be very unique.Kiwi Ears
For those who don’t know, Kiwi Ears have been around for a hot minute and are still relatively new. Of course, they’ve had so many hits and so few misses that it almost seems like they’ve been around longer. This is a brand committed to crafting and creating iems & audio devices that are both technologically relevant and also committed to make sure their products stand-out against the competition. We all know how many brands simply copy, copy, copy. We see it all the time folks. However, go down Kiwi Ears list of products. Look at their past releases. One after the other they are quality sets “per the price point”. Sets like the Kiwi Ears Cadenza (Cadenza Review), the Kiwi Ears Dolce, Kiwi Ears Forteza (Mahir’s Forteza Review), Kiwi Ears Melody, Kiwi Ears Canta, the collab Kiwi Ears X-Crinacle Singolo (Singolo Review), Kiwi Ears Quartet (Mahir’s Quartet Review), Kiwi Ears Quintet, the astounding Kiwi Ears Orchestra Lite (Orchestra Lite Review), and finally their flagship Kiwi Ears Orchestra (Mahir’s Orchestra Review). Not to mention their Kiwi Ears Allegro, and Allegro Mini dongle dacs. Each and every product is well timed and relevant. Every one of them. They don’t flood the market, Kiwi Ears doesn’t promise amazing feats of sonic amazement, and they don’t overprice their iems and audio devices. Kiwi Ears exudes price to performance with products which may be lower priced… but they aren’t cheap. There’s a difference. Also, no this isn’t a Kiwi Ears commercial, but I really do love to see solid brands get their flowers. Furthermore, this is only my opinion. Over and above that… this also seems to be the consensus amongst most hobbyists.Competition
Of course there are loads of competitive sets around that $200 price. I actually just reviewed a phenomenal iem in the Juzear 61T Butterfly (61T Review), or even the Simgot SuperMix 4 (SM4 Review). Shoot, there are two handfuls of great single DD sets like the Simgot EA1000 (EA1000 Review), Dunu Falcon Ultra etc. Or even planar sets like the Hidizs MP145 (MP145 Review) and most importantly the absolutely wonderful Letshuoer S12 2024 (S12 2024 Review). I listed about 5% of the competitive iems around $200. The truth is, I don’t have the patience to pull all of the links or else I’d list them all. Point is, there is a mountain of good sets. As I said before, the KE4 has to really be special and do something different to stand out. Or maybe it just does the same thing we’re used to… but better. I have only heard a couple New Meta tuned sets and so this should be interesting to say the least. I guess I have to get them in my ears to find out. So, with all of that said, let’s check out Kiwi Ears latest, the Kiwi Ears KE4 everyone…Non-Affiliated Purchasing Links:
–Kiwiears.com–Aliexpress
–Amazon
Disclaimer:
I received the Kiwi Ears KE4 from Kiwi Ears in exchange for a full review and feature at Mobileaudiophile.com. I have not received any payment or any other form of compensation for this review. This set is a review sample iem. Kiwi Ears has not requested to pre-read any review and doesn’t have any control over “what” or “when” anything gets published to mobileaudiophile.com. All thoughts within this review are my own, though please take note that I will always have my own biases. This is impossible to get around. I try to be as objective as my subjective self can be, but this is an opinion piece folks. Thank you to the very kind people of Kiwi Ears and thanks for reading.
Gear used for testing
–Ifi Go Blu
–EPZ TP50
–Simgot Dew4x
–Aful SnowyNight
–Fiio Q15
–iBasso DX240 with Amp8 MK2
–Shanling M6 Ultra
–Shanling H0
Packaging / Accessories
Unboxing
The Kiwi Ears KE4 arrived at my house in a medium sized (what’s medium?) black box sporting an outer sleeve which is handsomely decorated with a picture of the KE4 in the front. You see their bright and vibrant logo in the top left corner and “KE4” at the bottom right. So, take the sleeve off and the inner box is just as handsome. I like the deep black with the silver Kiwi Ears logo in the middle. It makes for at least a couple nice pictures which is always welcomed. Anyways, take off the box top and inside you’ll see the fly looking KE4 sitting slick in some foam-covered cardboard cut-outs. Peel off that layer and you’ll spot the carrying case, all black and also sporting the logo. You’ll also find the eartips, some nozzle mesh filters and of course the cable as well. Overall, a decent $199 package. It won’t blow your mind but also, it’s decent and you are getting one heck of an iem.
Carrying case
I don’t have a ton to say about the carrying case and I’m fairly positive that 92% of you could care less. However, I’m speaking for that last 8% who actually want to know about the case. Believe me, I would much rather couple all accessories in one paragraph. Who am I kidding, that’s just not me. Anyways, the case is pretty slick. It’s an all-black and fabric covered hard case with a working zipper. Can I just say, I’ve always been a fan of the Kiwi Ears logo. So, I don’t mind that the logo is also right in the middle of the case. Looks sweet, looks fun, yet doesn’t come across cheesy. That’s a tough thing to accomplish. Anyways, the case is just large enough to fit your KE4 as well as the cable, possibly some tips and if you are good at situating things in tight spots, you may even fit a small dongle dac. So, it’s a decent carrying case which will do well enough at protecting your precious earphones.
Eartips
Inside of the packaging Kiwi Ears provides the buyer with three pairs (S, M, L) of their very own Kiwi Ears Flex eartips. Folks, these tips are very comfortable, actually extremely comfortable. They are an off-white-colored soft silicone eartip with an ear wax and debris silicone guard over the open hole. I don’t know how I feel about the silicone guard over the nozzle. To me I feel that it will impede on the overall sound. Oddly enough I couldn’t be more wrong. Also, the silicone isn’t some flimsy and chinsy type silicone that won’t hold the form of your inner ear. On the contrary, I feel like these tips hug my ears. Now that I’ve said these nice things I have to now declare that I didn’t actually use the included tips with the KE4. I instead used some of my favorite wide bore eartips in the Letshuoer blue shallow fit wide bore eartips. This set really does sound better to my ears with wide bore tips. There’s almost a subtle vibrance which comes to the sound, bass feels slightly tighter too. You may have slightly different results so do keep that in mind. Also, the included tips sound very good with this set as well so please don’t think you need to tip-roll. If I didn’t get the idea to try wide-bore tips I never would’ve used anything but the Flex tips. So, to be clear the Kiwi Ears Flex eartips are nice tips.
Cable
Guys and gals, maybe I haven’t looked hard enough, but I cannot find anything out about this cable. I checked all of my usual spots and don’t have a clue what the material is. Oh well. Anyways, Kiwi Ears provides a decent cable with the KE4. It’s a 2-pin cable, brown in color, nice braid, and ends in a 3.5 single ended jack. Okay so, I definitely would have liked to see a modular cable with such a prolific set. Listen, this is not a bad cable by any stretch of the imagination, but I also feel that the majority of folks will likely swap cables. I’m not saying it’s a bad cable. In fact, it’s quite nice. However, it is slightly under the price point. Beyond that, the KE4 does benefit from more power provided to these drivers which is something that a 4.4 balanced cable will help to provide to a slightly greater extent. Depending on your source of course. Also, I wish Kiwi Ears would’ve added a fat and silver cable. I wanted that so much that I swapped cables to the KBear Chord 4.4 balanced cable and man is it slick looking with this set. It looks so cool! What a pair. Also, the Graphene of the Chord seems to improve any set I attach it to. The KE4 is no different. I highly suggest picking up the Chord for any earphone and in this case, I feel it does help both aesthetically and sonically with the KE4. Again, the cable which comes packaged is not bad at all and will most certainly do the job it was created to do. I just think there are some better cables which pair better in a few different ways with the KE4.
Build / Design / Internals / Fit
Build Quality
So, we’ve seen an influx of all-resin iems. Even as low as $35. However, please don’t make the mistake of thinking that the KE4 is one and the same with cheaper sets. It truly isn’t. This resin is so well done that I get that premium sense when they are in my hands. The Shells are actually made by way of 3D printing using medical-grade resin materials. Everything else is handcrafted by Kiwi Ears talented staff. The nozzles are roughly about 6mm in width, and they don’t extend too far into the ear. About medium length, or average length I’d say. You’ll notice a fairly large back vent with a filter mesh covering it which is there to regulate pressure in and out of the ear, as well as for tuning purposes. You cannot find a rough spot on this set. Everything has smooth curves, is all about comfort, and ergonomics are awesome with this set. Just a very well built iem from front to back. Really a job well done Kiwi Ears!
Design
This brings me to the design of the KE4. Did I ever tell you that I’m a sucker for a minimalist yet classy design? Well, I am now. It’s a dope look. So simple and yet so sleek, slick, and cool. The Shells themselves are mostly black in color with what appears to be silver brushed aluminum faceplates and the Kiwi Ears logo adoring the center. Such a nice design. The silver on the faceplates POPS against the gloss of the resin and the black shell underneath. Just a very classy design. I love that Kiwi Ears understands that they don’t need a flashy look. Not all the time anyways. In a different way I adore the look of the blue Kiwi Ears Orchestra Lite that I have too. Look at the Cadenza, look at some of their other sets. Usually very well designed. Anyways, it’s simply nice. I suppose that some of you won’t dig it like I do, but nothing pleases everyone.Internals
The Kiwi Ears KE4 is a four-driver hybrid iem consisting of two dynamic drivers and two balanced armature drivers. I was originally enticed by this set because I heard they’d have two 10mm bass region dynamic drivers that sit in an isobaric chamber. Instantly I needed to hear it. Tha fully I have that opportunity now. So, the DD’s are actually two 10mm dynamic drivers which cover the low-end. The midrange and a portion of the treble is actually covered by a Knowles RAD-33518 balanced armature driver coupled with a good-sized ventilation hole which was specifically used to help the midrange mesh with the lows. Covering the ultra-highs is a customized Knowles RAB-32257 balanced armature driver. Really an interesting setup. I love the sub-woofer style isobaric system implemented here. Beyond the drivers, Kiwi Ears made sure to add in a three-way passive crossover system which incorporates three separate tubes as well to bring a completely coherent sound between frequency and drivers. Obviously, these drivers used are of good quality.Fit / Comfort
This set is simply comfy. I have no other way of saying it. They literally hug my ears and seat so well you’d think they grew there. Just a perfect fit for my ears. So much so that I could wear the KE4 for hours with no strain whatsoever on my ears. Now, will the KE4 fit you? I’d be willing to bet that they would but, I obviously can’t be sure of that. Anyways, the KE4 are so user friendly, ease of comfort, smooth everywhere, and rides every curve of my ear like a wave in the sea. Just a phenomenal fit for me. I really hope they fit you as they do me and I truly hope they don’t make a liar out of me… lol.
Drivability
Output
Rated with an impedance of right around 28 ohms along with a sensitivity of about 102 dbs, the Kiwi Ears KE4 is definitely sensitive. These are not difficult to drive. My iPad brings them to great volume very easily and there’s plenty of headroom. Shoot, even my Fiio UTWS5 sounds amazing with this set attached and that’s 53 mw at its peak. So even a smartphone should be able to drive the KE4 rather well. I don’t think you NEED some huge amount of power. Also, the KE4 sounds really great with low powered sources. But there’s more If you want the most out of this set. I truly feel you should strive for at least a 100mw @ 32ohm source device. If it has high gain on it, then use it. If you can run balanced 4.4 or 2.5… then use it. You’ll thank me. The KE4 will most certainly scale with power. In fact, I use high gain on all of my dongle dacs whether it be the EPZ TP50, the TP35, the Aful SnowyNight, the Simgot Dew4x, whatever the device I go high gain. The extra power seems to wake up those drivers. I don’t feel you “need” more power to sound good with the KE4. No sir, but I do believe you should want more power because the KE4 will sound at its best. I run medium gain on my daps ( iBasso DX240 & Shanling M6 Ultra) and the result is a tighter bass, better controlled treble and a slightly more refined midrange. To add to this little section, I also don’t think you need some unbelievably massive amount of power either. There’s a cap to that where you will stop hearing any improvement. So be reasonable.Source pairing
This takes us to source tonality pairing with the KE4. I know for a fact that you’ll hear or read reviewers proclaim that you NEED a cooler or neutral source with this set. Don’t buy in. I know I don’t. Just because a set is warmer doesn’t mean you need a cooler source. You don’t have to offset tonality. The KE4 sounds just as good with warmer sources as it does with brighter sources. Flat-out and hands-down. Just as good, but simply in a slightly different way. Yes, some warmer sources will help the KE4 to sound more rich and more syrupy, less airy to a small extent too. However, the best I’ve heard this set, with all of my sources, was with a warmer device in the Shanling M6 Ultra. Now, I do enjoy the KE4 with more neutral sources too, like with my iBasso DX240. It sounds great in its own slightly less rich way.
Synergy?
Don’t buy into synergy all the time. Synergy is a made-up word which has its place (to an extent), but it’s really just a tonal pairing which sounds good to you. That’s it folks. I get it though. Some things sound better than others and it resonates with my own personal and particular taste too. Same thing can be said of reviewers who state that the KE4 “synergizes” better with one device or another. It does not mean you will feel the same way! This is a subjective hobby… for everyone… including reviewers. That said, I think most folks would generally want a more neutral source. Sorry I had to go 8 miles out of the way from a two-step destination on that one. I just feel that we have to be transparent in this hobby. It’s your money that our words are playing with and that thought alone makes me uncomfortable.What do you need?
Like I said, anything will work. You don’t need something powerful. That said, something powerful does help. I would recommend a decent Dongle Dac. Preferably something with around 100mw @32. More is better too. It just helps to wake up these drivers a hair more. You certainly could get away with a smartphone and that will still sound really good. So don’t feel lacking or pressured to purchase something you can’t afford in the name of slightly better sound. Especially if you are strapped for cash. If you have the funds, then I’d say try to get a nice dongle dac with a clean sound and decent power.
Sound Impressions
Note: I want to preface this entire sound section with something that I feel is very important to the enjoyment of the KE4. Burn it in. I know, I know, you don’t believe that helps or that any change can occur. Just, humor me. I gave this set about three full days of burn in and it 100% made a difference in overall coherence of the KE4. This isn’t always the case, but it certainly is the case with the KE4. I listen with flac or better files which are stored on my devices. Also, I listen mainly on UAPP (USB Audio Player Pro) as my software side music player. I also use Hiby Music app at times for certain sources as well as Poweramp at times too. New Meta?
I’m sure by now you’ve heard about the New Meta Target tuning curve which is fast becoming one of the more lauded and applauded targets. Well, “fast” may be a hair misleading but there is certainly an appetite for this target amongst the community. There’s good reason too. We’ve seen a handful of sets which carry this New Meta Target, and each has been fairly well praised. Sets like the Dunu X-Gizaudio DaVinci (DaVinci Review), or the Hisenior Mega 5EST, among others. There was a time when the 2019 Harman curve ruled the Audioverse and its tentacles reached far and wide. In fact, the Harman target still has some folks who fully embrace it. I understand that too. Harman is for those seeking that neutral and yet fun sound. Alot of great sets had a Harman tuning. I just think that maybe we got a little tired of it. Used to it. That’s all. Most certainly there was a time and a place for the Harman curve and each variation of that curve as well. However, the New Meta curve seems to be here to stay. It’s just how the audio pendulum swings my friends. Folks are ready for warm, rich, lush, and clean sound with an obvious low-end boost. At least some portion of hobbyists. Let’s take a look at the KE4…How does it sound?
Now let me just get something out of the way really quick, I really like the sound of the KE4! I will try to explain why as we go through this review. I mean, it isn’t perfect by any stretch. It isn’t the most fine-lined and crystalline in its note outlines and isn’t the most separated. In fact, I never thought I would have dug it the way I do. Especially looking at the graph, yet I really loved the DaVinci which also follows a similar curve. So maybe it isn’t so odd. Now this is going to be one of those tunings that you’ll either love or… maybe not love. The KE4 has got a softer sound, more laid back, less intensity, not as decisive and exact in its note definition, not the speediest in comparison to some sets either. You don’t have as much sprawling and vibrant energy as you would with other sets that are more Harman tuned for example. Truth is, I like a vibrant set sometimes, I like energy, I like dynamism, I like big and bright macro-dynamics. However, there’s something to be said for a set which is straight up musicality done right, buttery, creamy and totally tuneful. Also, the dynamics are there, they just aren’t as distinctly contrasted as some other brighter and more V-shaped sets. The KE4 gets me with its note density, its velvet demeanor, its unprocessed and wholly natural sound, and the fact that each area of the mix is partitioned out beautifully with wonderful coherence across the spectrum.Jazzy vibrance
The Kiwi Ears KE4 comes across warm/neutral in tonal coloration yet leaning warmer in body, but with good vivacity when pushed with rich dynamics. Again, I don’t consider the KE4 an outright energetic sounding iem. It’s laid back as a whole and not as lively in the traditional sense, but again, it still carries good macro-dynamics with a very jazzy type of vibrance. Not a bright, crisp, brilliant or luminous energy here. You won’t have those screaming highs, the glaring midrange or all of the little side effects of an overtly boosted pinna gain (only 8-9 db’s) and elevated treble region. Sibilance is not an issue and there’s nothing peaky or piercing about this sound either. Instead, the KE4 is effortlessly smooth, completely non-offensive and totally melodic. I’d call it a warm U-shaped sound with a definite sub-bass boost. It has a warmly weighted, unsullied, and relatively polished midrange positioned forward in the mix. It has a less emphasized but peppery enough treble region when it’s given some juice. The KE4 has rounded notes which are nicely detailed for the tuning, and good extension that isn’t too vigorous or enthusiastic. Every area of the mix is accounted for very well per the target tuning too.I could listen for hours…
The KE4 shows off nice depth of field which adds dimension with rounded notes which have actual body and convexity to them. Nothing flat here. Texture may not be as evident as some sets, but I also don’t feel the KE4 lacks in this regard either. This is a wholly musical sound that is engaging in all the right ways for me. No, it isn’t the most clinically pristine sound. The KE4 doesn’t necessarily have glass-lined notes and isn’t a technical beast. With all that said, I love what Kiwi Ears has done here because for all the subtle subjective ways in which it may lack, it makes up for with a completely charming, enchanting, and agreeable tuning that I could honestly listen to for hours on end.Cozy-natural?
Another feature worth noting about the KE4’s sound is the natural and creamy timbre. Simply organic. Not “neutral-natural” but “cozy-natural”. We all have our ideas of what “natural” sounds like. For me though, in this listening session I cannot help but love the earthy vibe, the authentic feel. There is definitely color in this tuning, but that color makes this set sound realistic to life. Each note is expressed in a clean enough manner as well, which helps the KE4 to not sound muddy or veiled. Notes have a stout and dense nature to them on the KE4 with relatively clean note outlines. It’s never fuzzy, grainy and not congested as a whole. Of course, it’s not as technically pristine as sets tuned analytical or treble boosted which may feel like it lacks crispness, peppy snap, airiness, or openness to some hobbyists. Still, the sound is very clean per the tuning along with very nice detail retrieval for a slightly warmer sound. Most notes come across ever-so-slightly soft in presence, yet clean and dense in note body which seems to help compact the sound to a degree. That attack is followed by a perceivably tight enough decay to not sound as though it’s too inarticulate or veiled like some other warmer sets. Perhaps resolution isn’t the KE4’s strong suit (isn’t lacking either). However, I’d trade resolution (which really isn’t bad at all) for engaging musicality any day. Again, wonderfully pleasant timbre and a deep breath of fresh change that is very inviting. Let’s check out each 3rd of the mix.One more thing…
I need to just preface everything you read past this point. Folks, the Kiwi Ears KE4 is a different animal than we are used to hearing. It fits a certain type of listening style and preference. It will not be for everyone. This New Meta (why do we label this?) tuning was a choice, a protest, a target created to rally against the market wide barrage of Harman tuned sets and therefore may present a slightly polarizing sound at the offset. Okay I may be going a bit too hard in that last sentence but I’m sure you understand the sentiment. Basically, we’ve heard enough Harman for a minute. With that said, there will most certainly be some subjective issues for those who truly enjoy a more neutral, airy, dynamically contrasted and clinical sound. So please keep that in mind. The KE4 may take a minute to get used to if you are coming from a more neutral/bright sound. Without question, the KE4 is a set which fits those hobbyists who value musicality and mellifluousness over anything else. It may be a departure from what some of you are used to. However, I am utterly impressed by the KE4 and find myself wanting them in my ears to replay my music library more than almost any set of late. Okay, moving on…
Bass Region
The low end of the Kiwi Ears KE4 is certainly sub-bass focused with a full but also taught delivery in respect to the overall quantity. Softer in its surface texture and not the most well defined that I’ve ever heard, yet it fits the tuning to the tee. I don’t want you to get the wrong idea here though as the KE4’s low-end is not a one-noted bloom fest. I feel that for the quantity and for the focus the bass has on this tuning that it is clean and well defined. In this regard the low-end has good note definition along with the ability to run fast and tight. Softer at attack, but also fairly quick and dense on the initial attack, followed by a quick recovery. These DD’s are working great in tandem. Not to the extent as something like a planar can be quick, but for a bigger bass presence the KE4 is tight even in complicated tracks. Again, this isn’t the most hard-edged bass I’ve ever heard. Not as much vibrance or snap as some sets, but also these two attributes aren’t non-existent either. Also, the KE4 may be emphasized, but it isn’t basshead to my ears. It’s big, it’s bold, it’s authoritative, but it isn’t so much of a focus that it covers, masks, or smears other regions. The low-end really keeps to itself besides some subtle spill over into the midrange. Overall, I really dig this bass folks and I’ll try to explain it further as this section moves along. Sub-bass
Like I said, this is a sub-bass focused bass region. The KE4 sub-bass has plenty of low droning energy and haptic feel to the sound. I’d say it has average texture as well which is a great thing to hear. I think what I like the most is the dynamic control of the sub-bass. Yes, it has a meaty presence and yes it isn’t the most hard-lined and crisp, but it has great control coupled with good and dense notes. Which, after listening for days now has finally brought me to the conclusion that the sub-bass is actually very clean. No, it isn’t the most well defined in the micro sense. It’s in the speed of its cadence and rhythm and the way it can meander through complicated tracks all while keeping that heavy density and meaty vibrational feel to the sound. Nothing weak about it folks. It’s bold, beefy, bulbous, but also speedy. I realize this all sounds like contradicting statements. How could a soft note attack sound clean? It’s in the speed of recovery and the fact that the KE4 can and will take on some more complicated arrangements fairly well while keeping that macro definition and compacted note density.Sub-bass examples
The track “The Hardest Part” by Washed Out has a groovy bass guitar which speeds along and on the KE4 it doesn’t sound like smeared bass. Each inflection of the bass guitar riff is heard in the midst of a heavy and full body with a nicely edgy note outline. Other songs like “Tell Me What’s on Your Mind” by The Decemberists also has a slower progressing, but ridiculously deep and edgy bass guitar which. Once again, the KE4 provides impressive guttural fullness and weight that sounds great as the foundation of this track. I could point out quite a few tracks but hopefully you have the idea. Sub-bass focused and clean per the emphasis, deep, extended and speedy enough to not get tripped up. Also, it’s just nice.Mid-bass
Now the mid-bass is not as lifted as the sub-bass, but I still find it emphasized enough to give the body that’s needed to those bass guitars and the boom needed to provide the volume punch needed for kick drums. Not a snappy or crisp mid-bass and possibly more laid-back than some may enjoy. Basically, it isn’t the crispiest mid-bass and doesn’t have that lean-muscle snap to it. Of course, I also don’t feel the KE4 lacks these qualities either. It simply isn’t tuned to portray low-end instruments and tracks in this way all the time. It has a slightly wider note body, not as transient swift as some other sets either. Having said that, the mid-bass also fits the overall tuning wonderfully. This isn’t a mid-bass for those who love a “hit-it-n’-get-it” type of speedy punchiness. The mid-bass is more atmospheric and earthy, less intense in its dynamic presentation. Also softer on attack to a degree though there are tracks that will argue that.Mid-bass examples
Like the song “Type crap” by Future and Metro Boomin off the We Don’t Trust You album. That bass drop simply hits hard and has some good dynamism while also not really masking anything else over to a detrimental degree. You get some lingering resonances with the KE4 but not so much that I would call it lacking in note definition. Again, this is not a basshead set per se, but it can really boom nicely. Tracks like “Billie Jean” by Weezer (Michael Jackson cover) actually hits hard and fast with great density to those kick drum booms followed by a clean snare drum “pap”. Certainly not the most rigid at the crest of each note, but the big and hollow boom sounds great, and I don’t hear the exaggerated lingering resonance that some more heavy bass-canon sets can have.Downsides to the Bass Region
The downsides are obvious. Anyone who wants that leaner bass profile with even better note clarity and detail will likely not enjoy this emphasized low-end. The KE4 isn’t the hardest edged or perfectly refined down low either. It is a clean version of a bulbous and beefy bass. You could call it mature for what it is. However, there are so many folks who will not agree with the emphasis here. I happen to really enjoy this fun, deep, penetrative and reasonable tight bass very much. It is a very gratifying and satisfying low-end which serves that guilty pleasure portion of my brain very nicely. To end this section, the bass isn’t flabby folks. I’m telling you, there is a very nice control of this region, and I feel that it helps to really serve my music well rather than hinder it. However, it is different from what some of us may be used to so do keep that in mind.
Midrange
The mids on the Kiwi Ears KE4 are simply engrossing. Mostly neutral in tonal coloration yet with a weighted and thick body to notes. The best word to describe the midrange is “engaging”, I don’t know how many ways to say it. I feel as though the midrange is most certainly the Star of the show on this set. I truly enjoy how the bass sets up this midrange with great note weight yet without lacking in clarity or cleanliness. Its creamy and syrupy type sound comes across as smooth and very musically inclined which makes vocals so delicious! The KE4 has snap when it needs it and is crisp when it needs to be, but by-and-large has a smoother presentation. Timbre is a standout feature of this engaging midrange which takes that “organic” moniker and doubles down with a forward sound that creates a wonderful presence for midrange notes. Yet at the same time the midrange doesn’t blare over the rest of the mix. To some it may sound duller than you may be used to, or less forward with its vibrant energy. That said, I feel the midrange is forward, full, velvety smooth, and unmistakably easy on the ears while also very well defined. Nothing piercing, nothing sibilant, and nothing even close to artificial or metallic. The KE4 has a very cohesive midrange replay as well. Tuneful
The KE4’s mids are subtly crisp but mostly smoothened, with an earthy and atmospheric type of tunefulness that comes across as mellifluous in most any track I throw at it. To add to that, the KE4’s midrange has a deep sound field which provides rounded notes that have good dimension to the sound with pretty good layering and imaging. Details in this region are also much better and more vividly expressive than I would’ve thought with actually very good micro-dynamics. The KE4 does carry well refined initial attack and a thicker note body, but also once again those individual notes decay rather swiftly as most midrange notes are well condensed and compacted. This makes the sound come across cleaner, even articulate to a degree. Obviously, there are many sets which come across much more refined and technically savvy, but those sets don’t carry this lifelike and weighted sound with almost perfect timbre. Again, earthy and atmospheric with wonderful tunefulness. I just love vocals on this set. Now, instrument separation and airiness aren’t going to win any awards. I’d say average in separation, certainly not congested but also not as distinct as some more analytical iems. Also, there is some air to the sound, but it simply isn’t the KE4’s calling card. Basically, I don’t think the KE4 lacks in these areas while at the same time it isn’t the focal point. Really just a musical midrange that I could spend days listening to.Lower-midrange
The lower midrange is one of the areas that really helps this New Meta tuning trump the Harman sound for me. I’m so used to thinner and less pronounced male vocals and instruments. I get that from many different sets but the KE4 seems to fix that issue. I say it all the time that I want men to sound like men. Give em’ some authority, some fullness, some body to their voices. Male singers like Max Mcnown in “A Lot More Free” sounds really nice as his raspy and emotionally gratifying voice plays right into the KE4’s strengths. His voice is weighted, just enough. His voice also has just the right amount of warmth against the neutrality of this region as well. However, it’s the forward sound to his voice which separates the KE4 from other sets without ever sounding too levitated in vibrance. Then you add in the very well defined and detailed acoustic guitar. Each strum comes across with a natural timbre and utterly clean against the weight of Max’s vocals. Another revealing track is “Take Me Home, Country Roads” by Home Free. These guys are an acapella group and are amazingly harmonious. I’m telling you the KE4 takes their voices and serves them up perfectly. From the bass to the tenors, each voice comes together wonderfully rendered. Just a joy to listen to on this set.Upper-Midrange
Female vocalists are slightly more vibrant, slightly more shimmery and slightly more engaging than male vocalists with the KE4 in my ears, in my opinion. There’s this rich and moist sound with a slight glittering of shine to this region. Again, nothing even remotely close to glaring or bright. The upper-mids are defined by their bodied sound and musical flare which creates a nicely organic timbre for both instruments and voices. Females come across more open sounding with a more vivacious quality. The upper-mids have better separation between notes, and a cleaner delivery. Certainly, more revealing in that way. Sia songs “I Forgive You”. In this track her voice comes across rich and dulcet in every intonation to her voice. She is presented forward and full, euphonic and sweet with a resounding quality on the KE4. This set finds every last inkling of emotion and packages it up in such an easy way to stomach. Really a sweet sound. I’ve always enjoyed females with a rich quality as I don’t enjoy dry and papery, or thin. With the KE4, females can go from feathery, soft, svelte and subdued, but also sonorous and resounding and they do so while never coming across either bland or too piercing to the ear. Certainly, the KE4 is one of the better vocal sets that I’ve heard in this price range. Again, my opinion.Quick instruments
Beyond vocals, instruments also come across timbre-accurate, organic, weighted, and musical. I feel like many instruments are simply tonally correct. I suppose percussion could use a hint more of a pointed snap to them, but I still don’t find the KE4 lacking in this regard. Like the fundamental tone of a cymbal strike has good body, slightly chimney, but never shrill or splashy. Snares have that nice power behind them, generally. Perhaps they could use a bit more of a tacky initial attack, but all things considered they can be nicely satisfying to the ear. I could see some folks wanting a bit more of a direct burst of energy there. Violin on most tracks is very melodic, silvery, and really just pleasing for me. Let’s put it this way, without going through every instrument I’ll sum it up as this; no, the KE4 isn’t perfect, and yes, there are ways in which it could be better. That said, timbre is very nice for instrumentation. I also enjoy the note weight afforded to instruments, as well as the slight forwardness and good clarity of this region. Instruments have a nicely detailed sound as well as carry a rhythmic smoothness that is very pleasing.Downsides to the Midrange
I hate to list any downsides but there will always be those who simply don’t enjoy the rich sound of the KE4. I do feel that it could use a hair more of a peppery shimmer in the upper-mids which could lead way to that satisfying abrasiveness for strings, or snap for percussion. Certainly, there will be those who want more of a vibrant and even cleaner sound, better delineated and more evident detail retrieval, who don’t really care about the musical aspect of the sound. And guess what… that’s great. This hobby is full of different viewpoints and ideals, different preferences and it makes this the best hobby on earth. But as far as the KE4, not everyone wants thick lower mids. Some folks don’t want the bass region to even sniff the midrange. So many want absolute clarity. Many people also love an analytical sound with an ultra-speedy transient response. They want perfectly sculpted and glass-lined notes, or even brighter and even more revealing notes. Once again, the KE4 isn’t perfect. Despite that imperfect sound, it’s also one of the more enjoyable midrange sets that I’ve heard anywhere near $200, and I couldn’t possibly call it anything other than lovely. Vocals are great, and musicality is top notch at this price. Nice work Kiwi Ears!
Treble
Looking at the treble, it’s easy just to say that it’s safe, and to let the description die there. It is safe. The treble is not one that has volumes of cascading brilliance shining a light on every last little bit of minutia hiding in your music. It isn’t that. This is a treble which gets its value in upholding the rest of the mix and simply being a team player. It is not one which comes with uplifted and emphasized vibrance to the point that it steals the focus of the sound. With that all laid out, I also feel that Kiwi Ears nailed the sound in this region. Absolutely spot-on. Even with the lack of true gleaming brilliance. The treble on the KE4 doesn’t need that brilliance to sound very well defined, articulate and nuanced. I actually find detail retrieval very good on this set. Kiwi Ears didn’t need to pump the sound full of forced resolution brightness and they didn’t need to thin out every note for every note to sound distinct. They didn’t need to do that. They added just enough lift to bring a sense of levity, a sense of air, and they added just the right amount of extension in the upper treble. Notes already had good note body, but they needed a quality tuning and quality drivers to form the contours of that body. What you are left with is a relatively clean, relatively contoured sound which never threatens the musical nature of the KE4. Just a well-done treble region. You can’t find anything shrill, anything shouty, anything sharp, nothing piercing, and you can’t find sibilance (unless you are crazy sensitive). What you find is natural, organic, cleanly outlined notes that have good density and treble punch with a slight peppering of crispness. Examples
I should stress that this is not a treble saturated in luster and gleaming in forced resolution with massive amounts of air and separation. The KE4 operates on a different philosophy and is simply good for what it is and what it was targeted to be. That all said, it can move along some speedier treble arrangments fairly well. Now, of course the treble on the KE4 can get tripped up in heavily congested music up top. Then again, most sets can get tripped up on such tracks. Be that as it may, the KE4 handles tracks like “Evil Twin” by Lindsey Stirling with wonderful timbre and cadence while resolving most every note she plays. It sounds accurate and doesn’t feel artificial at all. “Bishop School” by Yusef Lateef is another track I use for testing purposes, and it comes with loads of treble activity from various instruments. I love the body and punch to treble notes while remaining smoother than it is crisp. However, extension up top is not bad either. I wouldn’t call it too heavily boosted past 8k as cymbals on the track “In Bloom” by Nirvana have that nice fullness to them, a slight shimmer, but never any splashiness.It fits
Having said all of that, I wouldn’t call this a treble heads dream. Far from it actually. It’s not the typical treble that I would refer to as “good”. I also highly doubt any true “treble heads” would be jumping for joy either. With all the good words I’ve spoken about the top end of the mix, it’s still safe, still dynamically laid back too. In fact, for the first few hours of listening I thought the treble was dull, boring, and almost too safe. The KE4’s treble slowly grew on me when I began testing out songs that I’ve tested a hundred times in the past. It also helped when I pushed the volume a bit, gave them some juice. Once I erased my preconceived ideas about what “good” actually is. I suppose now I prize a treble that simply fits the overall tuning first and foremost. Coincidentally, the KE4’s treble does just that in a very coherent manner. I still find it pretty polarizing and possibly different from what many are used to. But man do I reach for this set a lot.Downsides to the Treble Region
The downside here is the lack of brightly sheened brilliance for those who yearn for that type of replay. As nice as I feel the KE4 is in the upper portion of the mix, I have heard many sets which are truly treble delights. Sets that aren’t as safe. I’m talking about sets which push the treble right to the edge, much more luminous, open sounding, more pristine, better crispness, more treble bite and a higher resolution. However, you couldn’t plop those treble replays into the KE4, and it come across nearly as fine as it does. Why? Because the treble on the KE4 fits. A little boost here and there will change what makes this set so charming and engaging. Also, I think the upper regions are nicely tuned, airy enough, resolute enough, detailed enough, and they never kill your ears in ear gouging sharpness.
Technicalities
Soundstage
When listening to the Kiwi Ears KE4 I feel the soundstage is not as wide as some other sets in the price point. I wouldn’t call it narrow in width, but I also wouldn’t call the KE4 vast in stage width either. Maybe average. The sound field is closer to the listener, not pushed back as far, small venue type stage. Having said that, the stage does have solid depth. I can plainly hear this in many tracks with good layers to the sound from front to back. So, while the stage is not humongous in overall grandness, it’s still not bad by any stretch.Separation / Imaging
Separation of instruments and vocalists comes across about average as well. There are so many sets tuned more clinical and more razor sharp in note agility. Also, there’s many sets which have that extra air to the sound, less thick and robust, more analytical and less musically gifted. What I’m getting at is that it is less typical to hear fantastic instrument separation with a set which has thicker and richer note weight. I’m not saying it can’t be done because I can tell you firsthand that it can. I’d say that in spite of that, the KE4 still has a clean enough note structure that separation doesn’t come across congested. The sound field doesn’t feel (sound) crammed. Imaging on the other hand is very well done. Left to right sounds pretty spot-on for me and front to back also shows off some layering of sounds. I would most certainly not call the KE4’s ability to place instruments on a stage in a coherent and well-defined way as “top class”, but I will definitely say that the KE4 does a very good job at imaging a stage. Perhaps on bass heavy tracks you’ll get a slightly more masked sound, to an extent. Or on heavily jam-packed tracks you may not be able to discern every instrument on a stage as well either. Of course, there are sets in the $200 price point which can separate and partition off instruments better and place them better. However, once again, that ability also comes at a price. The price of harmony, silveriness, and tunefulness, or… musicality. Everything is a give and take in this hobby.Detail Retrieval
Detail retrieval on the Kiwi Ears KE4 is average in some areas and above average in others. All things told it’s good in the details department. Again, it’s a rich sound, less wide stage, smoother in body, less bright and resolution isn’t a game changer on this set either. These conditions influence the sound to not always illuminate all the nuances as well as an iem with a more analytical, clinical, bright, and resolute set. This brings me to a nitpick within the community. Folks, we make too much of details. My question to you is how many details are you really missing? Yes, the sound on the KE4 isn’t so clean and pristine that the whisper of a fan 10 rows back in your favorite live track is going to be heard. However, I honestly miss almost nothing with this set. Details simply aren’t as raised to the surface as some iems. Still, we make way too much of details. We always have actually. I still hear everything with the KE4 that I do on analytical sets. The Aful Performer 8 brings out the subtleties with ease and is very expressive with its details but guess what… I still hear the same details just fine on the KE4. So, they aren’t as bright, they’re warmer sounding, less obvious to a very small degree but I’m not missing much. I think the biggest culprits against detail retrieval are heavy bass, badly recorded tracks, bad fit, and congested music. I’d still say the KE4 is about average for its price, and very good for its tuning. Also, average is good.
Comparisons
*Note: I am going to be very quick with these comparisons below. Also, I am going to use very broad strokes when comparing. I don’t need to go super in depth with differences but will hopefully do so in a way that helps to explain the set I’m reviewing. Simgot Supermix4 ($150)
What a special iem! Just a fabulous quad driver set. I reviewed the Supermix4 (SM4) earlier this year (SM4 Review) and I gotta tell you folks, it is a wonderful set if the tuning agrees with you. It does it all very well, but it also does it all for only $149. Simgot is one of the most respected brands in this space and they are truly remarkable tuners & sound engineers. So, the SM4 comes equipped with one dynamic driver, one balanced armature driver, one micro planar driver, and one piezoelectric driver. The way Simgot coherently tuned all these drivers into one cohesive and musically/technical sound is quite impressive.
Differences
To begin, the KE4 is a larger set than the SM4. Yet it also fits me better (don’t know about you). I find the KE4 is certainly the better-looking set with a better design language and has better isolation as well. Both iems are outfitted with similar accessories too. Of course, the SM4 is $49 cheaper than the KE4 too, so keep that in mind. The cable for both sets is a wash between the two I’d say. Both are nice enough. Both sets also came with a lot of fanfare and adoration as well.
Sound Differences
First off, the SM4 is closer to flat neutral whereas the KE4 definitely has a warmer tilt. I find the KE4 to be the more natural sounding iem too. Just more organic, true to life and more accurate for both voices and instruments. This takes absolutely nothing away from the SM4 though. Of course, it does have the slightest tinge of artificial timbre, but I find it’s sound irresistible. The SM4 is certainly more V-shaped with a snappier and quicker bass, a deeper bass by a small margin but the KE4’s low-end is fuller and more impactful. The KE4 has the richer midrange note weight, more engaging, more forward, and musically more enriched. The SM4 carries better resolution in this range with more refined and contoured notes. The SM4 is crisper, with more snap, and more crunch, to the KE4’s smoother sound, warmer sound, and more liquid sound. I do feel the KE4 is better for vocals and correct timbre while the SM4 is more technical, brighter, and simply more detailed. The treble of the SM4 is brighter, more intense, has more crunch, more bite and is simply better in every technical way. The KE4 has rounder notes, better body, and once more timbre is better on the KE4. The KE4 has better depth of stage with just as good layering, but the SM4 wins out in separation across the mix, as well as tighter and more exact transients.Final thoughts on this comparison
As you can see, this is a “preference battle” all the way. Meaning, you’ll know right away which set you better identify with due to the distinct difference between them. Two totally different animals here and two sets that I personally grab for on a consistent basis. My preferences reach across almost all sound signatures and so one day I may grab the SM4, another day may be the KE4, and another day may be a basshead set, or a treble head set. It’s whatever I fancy. The point is that I love every signature and when you have two of the best at their respective signatures per their price point it is hard saying one is better, or one is more pleasing etc. So, I cannot call one better than the other. They are too different to do that yet both iems are truly fantastic.
Letshuoer S12 2024 Edition ($199)
Another absolute BALLER of a set and probably the best tuned planar iem on the market for many folks. Letshuoer decided to make only 2,024 units and called it a limited edition iem, in celebration of Letshuoer’s 8th anniversary. I also reviewed the S12 2024 (S12 2024 Review) about a month and half ago and was blown away by its rendering of the frequency for a planar magnetic earphone. The S12 2024 was one of the 1st planar sets which didn’t sound like a planar in the timbre department, but still had all the earmark technical chops of a planar set. It’s simply a wonderful creation from the folks at Letshuoer. Easily one of my favorite iems under $300. This is certainly a set to own and collect.
Differences
To begin, the KE4 is a 4-driver hybrid while the S12 2024 is once more a planar set. Both sets cost the same amount, and both are lived by many. Now, the KE4 is much larger than the S12 2024. Also, the S12 2024 is made of all alloy while the KE4 is made of all resin. Neither material is necessarily better but some folks have a preference. As far as looks go, it could go either way. Not everyone enjoys the gold on the S12 2024 and not everyone enjoys the logo on the KE4. I like them both. As far as accessories, the S12 2024 has a much better unboxing experience. Much better cable, better tips, better carrying case, and many extras too that the KE4 doesn’t and wouldn’t have. Of course, the S12 2024 is a special edition set. So that is understandable. Both sets are awesome to look at, both made very well.Sound Differences
Between the two, the KE4 is warmer, thicker, and more robust, possibly more musical, while the S12 2024 has a more open feel, still very natural but more vibrance. I find the S12 2024 to be much more textured across the mix too. As for bass, the KE4 has the deeper bass, heftier and meatier to the S12 2024’s more versatile, agile, (still meaty) and more well-defined low-end presentation. The midrange of the KE4 is warmer, thicker/richer, more velvet, less intense, generally more forward but less vibrant, especially near the pinna rise. While the S12 2024 is better textured, tighter transients, more detailed, cleaner, higher resolution, and simply faster along with a slightly brighter and more airy sound. The treble of the S12 2024 is more brilliant, has more crunch and bite with a better extended treble region. The KE4 has the darker treble, better note weight, rounder notes, smoother and less textured but easier in the ears by a small margin. As for the soundstage, the S12 2024’s stage is wider, taller and feels more open. While the KE4 has more depth, better layering, more 3d and holographic and simply more euphonic. Details come across better on the S12 2024 with better separation and a more rapid attack, more snap and quicker decay. The KE4 is simply more atmospheric and more laid back as a whole. Both sets perform wonderfully, and both sets once again are different in many ways.Final thoughts on this comparison
I love them both. Both iems represent a slightly different take on my music and both represent the best at the price point in respect to their tunings. If you want a meaty, bass wonderful set with thick and rich timbre but wholly natural and fantastically musical you may want to try the KE4. However, if you live that planar texture, yet also a planar which has very good timbre, very natural, very fun, and also very well presented in a nicely balanced way, then maybe you will want the S12 2024. Folks I chose my absolute favorites in the price point for these comparisons and so I don’t know how much it helps or not for the buyer, but it is a very fun comparison session. I love both of these sets entirely. Both are very good for what they are.
Dunu X-Gizaudio DaVinci ($299)
Oh, the DaVinci! How wonderful you are. The Dunu X-Gizaudio DaVinci is actually tuned very similar to the KE4 and both tuned to the New Meta curve. For the most part anyways. Really both sets walk the same line in almost all respects. Now, I also reviewed the DaVinci (DaVinci Review) earlier this year and was, and still am… Stricken by how melodic and musically gifted the DaVinci is. This is actually a collaboration effort between Gizaudio (Timmy Vangtan) from YouTube fame as well as Dunu TopSound. The DaVinci is a six-driver hybrid consisting of two dynamic drivers and four balanced armature drivers. Very similar to the KE4 but much more expensive.
Differences
Looking at the build, the DaVinci is certainly the larger set in every way. More drivers, fatter, heavier too. Fitment is easier in the KE4 (though I never had an issue in the DaVinci). Both are built very well using 3D printed resin. I do feel the DaVinci is the better looking iem of the two as it’s just gorgeous. That said, they are both gorgeous iems and also, this is purely subjective. The orange, golden, brown, fall color swirls is DOPE! The DaVinci is obviously better accessorized with a better unboxing, better cable, more tips, better case. It’s also $100 more expensive too so… expectations. I have to repeat, I truly adore both sets. Well, every iem comparison I’ve used in this review… I adore.Sound Differences
Folks, this is going to look one sided. I only say this to simply prepare you. Because these two sets are so close sonically this will also be a shorter and easier to manage comparison. Also, since the DaVinci is so much more expensive it does stand to reason it would perform a hair better. Both sets have similar organic, atmospheric, earthy type timbre. Though the DaVinci is the closer set between the two to sounding V-shaped, a hair more vibrant. More like U-shaped with a bass boost. Both are very natural to the ear. Both are warm/neutral yet have great energy in that warmth.Between the 20’s
Now, the bass on the DaVinci has much more depth, denser, more guttural, and has a more impactful slam. Both have great bass replays. I find the KE4 to come across better for vocals, slightly smoother, more forward than the DaVinci. Nevertheless, the DaVinci has slightly better technicals in the mids while also sounding great for vocals. Both are forward, both have beautiful midrange timbre. The DaVinci does have better detail retrieval here with better separation and a more holographic feel to my music. The treble on the DaVinci has more brilliant energy though the margin between both sets is small. Again, better details, more bite, but sound well extended into the upper treble. I do find the DaVinci has slightly more clarity, but it is subtle in comparison. The DaVinci has a wider, just as deep, but also grander of a stage. It’s fuller. You already know it bests the KE4 in details by a small margin and has slightly more macro-dynamic energy and expression. However, I do find myself reaching for the KE4 more at the moment, and not just because I’m reviewing it. I mean for casual listening. Something about the KE4 just resonates with me right now.Final thoughts on this comparison
There’s really not much to say because there are some similarities between these two sets. One is obviously a lot more expensive, and it plays the part. The DaVinci is probably the better set. However, if I were to say which is better for the price I’d definitely say the Kiwi Ears KE4. Simply better price to performance for me. That is 100% subjective and not a fact. I don’t say stuff like that to lead you astray. Please remember that and don’t message my inbox over it. I can’t believe I have to say that. Anyways, both sets are fantastic if the tuning agrees with you. Both have that warm and slightly polarizing sound that not everyone is going to enjoy. Now that’s a fact! As for me, I cannot say enough good stuff about the DaVinci and the KE4. You may feel different and guess what… we Are both right! I love this hobby.One more point I’d like to interject here is that this comparison is a huge bonus for the KE4. It literally hangs toe-to-toe with the DaVinci in many respects and costs $100 less. That’s saying a lot about how well Kiwi Ears did on the KE4.
Is it worth the asking price?
Okay, this is a question which has a clear answer, but that answer comes with an OBVIOUS caveat. That caveat is this; the Kiwi Ears KE4 is 100% worth the $199 asking price if… you enjoy a warmer and richer sound. That’s it. If you don’t want warm, rich, full, with gooey and engaging vocals and just a purely wonderful timbre than you will not feel the KE4 is worth $199. Heck, you may not feel it’s worth $99. I cannot envision a world where a set like this is not worth $199. I’d buy it over and over again until they stop making them or a new version hits the market, then I’d buy that. So yes, of course it’s worth it. However, this question is a question that I can only ask myself and for myself. If you’ve read any review by my hand, then you know I ONLY REVIEW PRODUCTS THAT I ENJOY. I don’t need to be a critical, insulting, and disparaging reviewer just to prove to the audio mob how honest I am like some folks… I don’t need to do that. Also, my time is far too important to me than to spend it reviewing anything I don’t enjoy. So, the simple fact that I reviewed this set should tell you that I dig this set. If I’m reviewing it… you know I think it’s good. However, that doesn’t mean I think it’s worth the price. That’s different. Good sets can be overpriced. The Kiwi Ears KE4 is not overpriced to my ears. The fact that it basically hangs step-to-step with the DaVinci says a lot.The Why…
Because the build is nice, solid, smooth, comfortable and ergonomically well made. Also, because it’s a solid looking set. It won’t look stupid in the ear. Minimalist, simple, yet gorgeous with the brushed alloy look on the faceplates. It’s a slick looking iem in my opinion. But the main reason the KE4 is worth the price is because of the sound, of course. It sounds so nice! So velvety-creamy and vocally delicious with a fun, big, and bold bass. Those vocals are almost class leading folks. The treble is very well done without needing to force resolution with heaps of emphasis. Details are pretty good to even with its warmer and more rich sound. The KE4 has good depth which creates a sonically 3D stage in front of me. Rounded notes, weighted, authentic timbre. Again, it won’t be for everyone but as far as I’m concerned, the KE4 is great and well worth the $199.
Ratings (0-10)
Note: all ratings are based upon my subjective judgment. These ratings are garnered against either similarly priced sets or with similar driver implementations or styles with the unique parameters of my choosing. In the case of the Kiwi Ears KE4 ratings below, that would be $150-$225 iems of any driver configuration. Please remember that “ratings” don’t tell the whole story. This leaves out nuance and a number of other qualities which make an iem what it is. A “5-6” is roughly average and please take into consideration the “lot” of iems these ratings are gathered against. $150-$225 is a very large sized scope of iems. So, it should be a nice surprise to see a rating above a “9.0”. My ratings are never the same and each set of ratings tells a different story. Each time you read one of my ratings will be unique to that review. Basically, I create a Rating that makes sense to me.Aesthetic
–Build Quality: 9.2 Built very well.–Look: 9.0 Dope industrial design.
–Fit/Comfort: 9.6 Fit and comfort is great for me.
–Accessories: 8.3 Nice unboxing, above average.
–Overall: 9.0
Sound Rating
–Timbre: 9.6 Natural, earthy, organic, rich.–Bass: 9.0 Heavy, deep, foundational bass.
–Midrange: 9.5 Those creamy & forward vocals!
–Treble: 8.9 Laid-back yet skilled, very nice.
–Technicalities: 7.9 Good techs per the tuning.
–Musicality: 9.7 Musicality over everything else.
–Overall: 9.1
Ratings Summary:
I don’t like rating things. Well, let me clarify, I like the process of rating things (comparing, listening, making notes, having fun), but I don’t like the outcome, and I don’t like how ratings can mislead. This review is actually a case where the ratings may be a bit misleading. I think the reason for that is how one sided the tuning is. See, the KE4 is fantastic for what it is. So, I rated the KE4 against every driver configuration in the price point. I couldn’t complete a ratings section with the KE4 vs other warm, bassy, and New Meta style sets. If that was the case it’d be a much higher score. Also, for those who don’t like this tuning, you will likely give the KE4 an average rating, maybe even below. So, like I said, ratings can be misleading. Also, so many of the readers skip right to the ratings which is why I HAD to begin making these ratings summaries. If nothing else I did it to explain myself. I was “asked” to complete ratings in my reviews. I begrudgingly accepted, and still begrudgingly do so. To be 100% honest, I don’t even feel my own ratings indicate how great he KE4 is. I feel it should get an overall sound score of something closer to a “9.5” or “9.6”. When I was done going through the comparison in each category with 10 or 12 different sets, I thought it’d be higher. That said, it is a treat to sit in my bed and judge each set. Making notes, giving a score, listening for differences. I enjoy that. I used planars, hybrids, single DD’s, all BA sets too. Anything I had that’s somewhat relevant in the price point mentioned above.Explain Yourself!!
Okay so, no question people will call me nutty for giving the KE4 a rating of “9.0” in the bass. I’m sure those people would rather have a tight, punchy, resolving bass with loads of quick and pointed impact. Better definition. I get it. However, I judged this set purely on how the low-end makes my music sound. Per the size of this bass the KE4 has a very solid low-end which I feel is a “9.0”. Next the “Midrange” rating of “9.5”. Those who enjoy a better separated, higher resolution, and better detailed midrange with more vocal shimmer and more energy will not agree with this score. To be perfectly honest, I held back my true feelings. I wanted to go “9.9” but I didn’t. I think that maybe, possibly, perhaps… I’m a prisoner of the moment and so I held back. Therefore… “9.5”. Also, how could I give a laid-back treble a highs core of “8.9”?! How? Well, because this treble is actually very nice in my opinion and it upholds and fits the overall tuning wonderfully with great timbre, good note body, good extension, and actually fairly well detailed too. Not above a 9, but close. The rest of the ratings I feel are on point and not worth my time explaining.
Conclusion
To conclude my full written review and feature of the Kiwi Ears KE4, I have to first give a big thanks to Kiwi Ears for providing the KE4 to be reviewed in the first place. Thank you so very much. This was an unexpected treat that I didn’t think I’d be able to do. So, thank you very much. I also thank the reader (that’s you) for clicking the link to this review. It is the number one thing you can do to help mobileaudiophile.com besides sticking around long enough to let Google know that we have decent enough content. We are really trying to get better. So, thank you for trusting us and we do hope each review is a help for you in some aspect of the buying process. Other perspectives
Finally, please check out other reviews. I am so late to the party with this set and there are a multitude of reviews captured about the KE4. It can only help you in making an educated decision. Please don’t read this review and then hit the “buy now” button. Please take in other perspectives, please read, watch, or listen to other opinions. We are all so very different folks. Each one of us have different likes and dislikes, different abilities to even hear the music, different music libraries, and we all haven’t been down the same journey through audio. This makes an enormous difference in how we each perceive music through devices. Some have a lot less experience and some reviewers have been doing this forever. Each is a valid and useful perspective. Also, there are so many ridiculously talented reviewers out there. So many smart and witty reviewers, and so many who will help you to understand the KE4 in possibly a different light. Anyways, with that said, I think I’m done. Please take good care, stay as safe as possible and always… God Bless!!
INTRO
Welcome to the written review of the Kiwi earsKe4.
Kiwiears is a brand that I'll be honest with. I like it. I don't usually have favorites in anything, but this brand seems to me to know how to do things right. Its releases, far from the Hype or the smoke of many brands, are usually synonymous with success. More than one product from this brand has given a lot to talk about due to the excellent overall sonic performance. I loved the Quintet and according to the advertising of this KE4 "a redesign" I expected an improved version of the Quintet. It's not like that.
This Kiwi Ke4 takes steps forward and steps back.
UNBOXING SECTION
Kiwiears is a brand that I'll be honest with. I like it. I don't usually have favorites in anything, but this brand seems to me to know how to do things right. Its releases, far from the Hype or the smoke of many brands, are usually synonymous with success. More than one product from this brand has given a lot to talk about due to the excellent overall sonic performance. I loved the Quintet and according to the advertising of this KE4 "a redesign" I expected an improved version of the Quintet. It's not like that.
This Kiwi Ke4 takes steps forward and steps back.
UNBOXING SECTION
In the unboxing we have the basics. Correctly presented and arranged in an attractive way, but without much luxury. We have, once the box is opened, the earphone capsules. A fairly elegant and pretty earphone. I like it.
Below is the carrying case. Inside we will have the cable; a 1.2 meter cable with a 2 PIN 3.5mm connection. A cable that does not stand out in anything but is not bad either. I think it is adequate for the selling price.
The product case is somewhat small, but it feels rigid. It is not the prettiest nor, as I say, the largest, but I like it quite a bit.
We also have 3 pairs of silicone M-size tips and some filters that barely change the sound.
Below is the carrying case. Inside we will have the cable; a 1.2 meter cable with a 2 PIN 3.5mm connection. A cable that does not stand out in anything but is not bad either. I think it is adequate for the selling price.
The product case is somewhat small, but it feels rigid. It is not the prettiest nor, as I say, the largest, but I like it quite a bit.
We also have 3 pairs of silicone M-size tips and some filters that barely change the sound.
SOUND
We have a hybrid configuration. Kiwiears joins the dual driver that Thieaudio started to make fashionable with the Hype version. It is true that it works and it works well. Perhaps more innovation would have been great, but at least what is good is preserved. Otherwise, a 2 DD + 2 BA configuration accompanied by a 3-way crossover (tubes) make this product at least interesting on paper. It has values of 102 db of sensitivity and 28 ohms of resistance. Values that may seem somewhat low but that will not be anything out of this world since a DAC dongle is more than enough. I would say that 120mw is more than enough to power this headset. If you have more power it is always appreciated, but do not worry.
In purely sonic aspects we have that the Kiwiears KE4 are IEM headphones that offer a balanced and detailed sound, focused mainly on a natural listening experience.
The KE4 excels at reproducing midrange frequencies, allowing vocals and instruments like guitars to sound crisp and clear. Although perhaps a bit more recessed than I would like. In the high frequencies, they are not sibilant or aggressive, which facilitates long listening sessions. Finally, the bass is precise and has good control, although it exhibits a very good punch. You could say that they are controlled but when they are unleashed they have enough.
Overall the Ke4 is a neutral-warm IEM with a boost in the low range, sub-bass and bass. The KE4 have a balanced sound signature with a focus on clarity, ideal for those looking for a detailed listening experience without fatigue.
SOUND SECTION – BASS
In purely sonic aspects we have that the Kiwiears KE4 are IEM headphones that offer a balanced and detailed sound, focused mainly on a natural listening experience.
The KE4 excels at reproducing midrange frequencies, allowing vocals and instruments like guitars to sound crisp and clear. Although perhaps a bit more recessed than I would like. In the high frequencies, they are not sibilant or aggressive, which facilitates long listening sessions. Finally, the bass is precise and has good control, although it exhibits a very good punch. You could say that they are controlled but when they are unleashed they have enough.
Overall the Ke4 is a neutral-warm IEM with a boost in the low range, sub-bass and bass. The KE4 have a balanced sound signature with a focus on clarity, ideal for those looking for a detailed listening experience without fatigue.
SOUND SECTION – BASS
The bass in the KE4 is well controlled and has a moderate presence, without being overwhelming. This means that the bass does not dominate the sound profile, but is present in the optimal amount to add weight and body to the music.
Lower frequencies, such as sub-bass, have good extension, giving them depth and a sense of presence, but without overshadowing other frequencies.
There is no excess "boom," so the typical congested or muddy sound that can occur with poorly tuned headphones in this region is avoided. This allows low-end instruments, such as electric bass or kick drums, to sound clear and precise.
The bass is not slow or fuzzy; it is fast and well-defined, resulting in an agile sound presentation, especially appreciated in genres such as jazz or acoustic music.
SOUND SECTION – MIDS
Lower frequencies, such as sub-bass, have good extension, giving them depth and a sense of presence, but without overshadowing other frequencies.
There is no excess "boom," so the typical congested or muddy sound that can occur with poorly tuned headphones in this region is avoided. This allows low-end instruments, such as electric bass or kick drums, to sound clear and precise.
The bass is not slow or fuzzy; it is fast and well-defined, resulting in an agile sound presentation, especially appreciated in genres such as jazz or acoustic music.
SOUND SECTION – MIDS
The mids are probably the KE4’s greatest strength or Ke4’s weakness. It depends on what you’re looking for. They are tuned to deliver exceptional clarity on vocals and melodic instruments.
The lower mids, which encompass instruments like electric and acoustic guitars, pianos, and some vocal frequencies, have a decent body, but without too much texture.
The upper mids (close to the treble) are well accentuated, not aggressive, so there is no ear fatigue even in long sessions.
SOUND SECTION – TREBLE
The lower mids, which encompass instruments like electric and acoustic guitars, pianos, and some vocal frequencies, have a decent body, but without too much texture.
The upper mids (close to the treble) are well accentuated, not aggressive, so there is no ear fatigue even in long sessions.
SOUND SECTION – TREBLE
The treble on the Kiwiears KE4 is refined. That’s the best word. It doesn’t feel overdriven or sibilant (avoiding that sharp or cutting sound that can be annoying). Smoothness is what characterizes it. The high frequencies have just the right extension. Don’t expect an airy or airy feel because you won’t get it, although it doesn’t sound completely dry either. It’s something in between.
Although the highs are detailed, they don't fall into an excess of brightness that can tire the listener. They focus more on subtlety, resulting in a relaxed listening experience, perfect for using the iem without fatigue. There are no pronounced peaks that generate sibilance (that uncomfortable hissing sound at high frequencies), making the sound relaxing and easy to listen to for long periods.
So, if you reread the review, what are they intended for? For monitoring or for certain video games. A FPS will not be the ideal game because this iem does not give such good detail and scene as others. However, for driving games for example I do think it can be very very interesting. You will feel the roar of the engine and a more immersive experience.
SOUND SECTION – TECHNICALITIES
Although the highs are detailed, they don't fall into an excess of brightness that can tire the listener. They focus more on subtlety, resulting in a relaxed listening experience, perfect for using the iem without fatigue. There are no pronounced peaks that generate sibilance (that uncomfortable hissing sound at high frequencies), making the sound relaxing and easy to listen to for long periods.
So, if you reread the review, what are they intended for? For monitoring or for certain video games. A FPS will not be the ideal game because this iem does not give such good detail and scene as others. However, for driving games for example I do think it can be very very interesting. You will feel the roar of the engine and a more immersive experience.
SOUND SECTION – TECHNICALITIES
The soundstage of the Kiwiears KE4 is wide for IEMs, but not outstanding when compared to high-end models or those specifically designed for greater spatiality. The KE4 provide a good sense of space in music, but the width is more limited compared to other IEMs of relatively similar prices
The width of the soundstage is decent for IEMs, offering a sense of space that avoids the feeling of congestion. However, it does not give a feeling of great openness. The depth of the soundstage is adequate, but not particularly outstanding. Do not expect a very deep three-dimensional representation, where instruments sound as if they are clearly positioned at different distances from the listener.
In short, the soundstage is sufficient, but does not stand out if you are a listener looking for an expansive scene with a sense of great spatiality.
The separation between instruments in the KE4 is one of its strong points. Despite not having a large soundstage, the separation is effective. You can clearly discern between different elements of the mix. Instruments and vocals to the left and right of the sound field are well-defined, which helps create a more immersive experience and prevents everything from sounding jumbled or muddy.
Despite the good separation, the lack of a wider soundstage can take away some of the “air” between instruments.
The Kiwiears KE4’s imaging is accurate but not spectacular. They are able to position instruments well within the sound field, but don’t expect extremely detailed placement in terms of three-dimensional height or depth.
While the KE4 are able to depict the position of instruments to the sides well, they are not as effective when it comes to depicting height or depth in a more complex scene. In other words, you might find that in highly detailed recordings, where you expect an immersive or “holographic” feel, the KE4s fall short.
The KE4's ability to capture detail is "good for its price range," but it doesn't quite reach the sub-$200 "groundbreaking" IEM that I thought this KE4 would be targeting. They offer a respectable level of micro-details, making subtle textures in vocals and instruments audible, but they don't reach the level of resolution of more expensive IEMs or cheaper IEMs like the Supermix 4 or Mp145.
The speed of the KE4 is solid, especially in the low end, where control is good and there are no unwanted rumble or echo. This helps maintain clarity in faster or more rhythmically complex genres like metal, EDM, or jazz fusion. However, some users might wish for more responsiveness in the high end.
The Ke4 is possibly the best sub200 iem for monitoring but it is relatively close to others such as the EM6l or even the 7hz Sonnus.
For music? It depends. If you enjoy this tonality go ahead, if not it is better to look for one that has more enjoyment and gives you that “wow” effect that certain iems can give.
For gaming? Yes, but for games where positioning is not crucial and you can “use” that bass. One of its best points.
I hope you enjoyed it, see you in future reviews. Stay tuned because a very interesting iem is coming.
If you want this product, just click here
The Thieaudio Hype 2 stands out for its greater resolution and detail capacity compared to the KE4. The Hype 2's mids and highs are more refined, with better representation of micro-details, providing a more accurate and audiophile experience. The Hype 2's soundstage is more expansive, making it a more attractive option for those looking for a three-dimensional experience. Although the KE4 is more relaxed and balanced, it does not reach the level of detail and spatiality of the Hype 2.
• QUINTET vs KE4
The Kiwiears Quintet outperforms the KE4 in almost every technical aspect, due to its five-driver hybrid configuration, allowing for greater resolution and control across the entire frequency range. The Quintet's bass is more impactful and well-extended, but without compromising control and clarity. The Quintet's soundstage is wider and deeper, offering a more immersive experience compared to the KE4's narrower soundstage. The Quintet's highs are also more detailed and extended, while the KE4's are more relaxed. If you're looking for more technical precision, the Quintet is the better choice within Kiwiears, but the KE4 is still solid for a more balanced listening experience without as much focus on extreme detail.
• SUPERMIX 4 VS KE4
The Simgot Supermix 4 has a more bass-focused sound signature, with a more impactful and deeper bass response than the KE4. In terms of soundstage, the Supermix 4 has a wider soundstage, making it ideal for those looking for a more immersive listening experience. However, the KE4 offers superior control in the bass, keeping it tighter and more precise, which may be preferred for genres where excessive bass is not desirable. In the highs, the Supermix 4 can be a bit more aggressive compared to the KE4's more relaxed and controlled highs, which may make the KE4 a better choice for those looking for a smoother, fatigue-free listen.
• BLESSING 3 VS KE4
The Blessing 3 outperforms the KE4 in almost every technical aspect. It offers a wider, more three-dimensional soundstage, with superior instrument separation and better spatial positioning. The Blessing 3's mids have more body and texture, while the highs are more extended and detailed, providing greater clarity and resolution without being aggressive. The KE4, while well-balanced, has a more modest presentation in terms of soundstage and micro-details, but remains more relaxed and less demanding for long listens.
The width of the soundstage is decent for IEMs, offering a sense of space that avoids the feeling of congestion. However, it does not give a feeling of great openness. The depth of the soundstage is adequate, but not particularly outstanding. Do not expect a very deep three-dimensional representation, where instruments sound as if they are clearly positioned at different distances from the listener.
In short, the soundstage is sufficient, but does not stand out if you are a listener looking for an expansive scene with a sense of great spatiality.
The separation between instruments in the KE4 is one of its strong points. Despite not having a large soundstage, the separation is effective. You can clearly discern between different elements of the mix. Instruments and vocals to the left and right of the sound field are well-defined, which helps create a more immersive experience and prevents everything from sounding jumbled or muddy.
Despite the good separation, the lack of a wider soundstage can take away some of the “air” between instruments.
The Kiwiears KE4’s imaging is accurate but not spectacular. They are able to position instruments well within the sound field, but don’t expect extremely detailed placement in terms of three-dimensional height or depth.
While the KE4 are able to depict the position of instruments to the sides well, they are not as effective when it comes to depicting height or depth in a more complex scene. In other words, you might find that in highly detailed recordings, where you expect an immersive or “holographic” feel, the KE4s fall short.
The KE4's ability to capture detail is "good for its price range," but it doesn't quite reach the sub-$200 "groundbreaking" IEM that I thought this KE4 would be targeting. They offer a respectable level of micro-details, making subtle textures in vocals and instruments audible, but they don't reach the level of resolution of more expensive IEMs or cheaper IEMs like the Supermix 4 or Mp145.
The speed of the KE4 is solid, especially in the low end, where control is good and there are no unwanted rumble or echo. This helps maintain clarity in faster or more rhythmically complex genres like metal, EDM, or jazz fusion. However, some users might wish for more responsiveness in the high end.
SUMMARY SECTION
The Kiwiears Ke4 has not disappointed me. Maybe I have been too critical but they set the bar very high and this Ke4 seemed to me to be a downgrade compared to other models. Having the Supermix 4 for 50€ less I think that this iem simply has no place. Moreover, if you are looking for a neutral profile and for monitoring the Moondrop Blessing 3 is better in practically everything.The Ke4 is possibly the best sub200 iem for monitoring but it is relatively close to others such as the EM6l or even the 7hz Sonnus.
For music? It depends. If you enjoy this tonality go ahead, if not it is better to look for one that has more enjoyment and gives you that “wow” effect that certain iems can give.
For gaming? Yes, but for games where positioning is not crucial and you can “use” that bass. One of its best points.
I hope you enjoyed it, see you in future reviews. Stay tuned because a very interesting iem is coming.
If you want this product, just click here
COMPARATIVES
• HYPE 2 vs KE4The Thieaudio Hype 2 stands out for its greater resolution and detail capacity compared to the KE4. The Hype 2's mids and highs are more refined, with better representation of micro-details, providing a more accurate and audiophile experience. The Hype 2's soundstage is more expansive, making it a more attractive option for those looking for a three-dimensional experience. Although the KE4 is more relaxed and balanced, it does not reach the level of detail and spatiality of the Hype 2.
• QUINTET vs KE4
The Kiwiears Quintet outperforms the KE4 in almost every technical aspect, due to its five-driver hybrid configuration, allowing for greater resolution and control across the entire frequency range. The Quintet's bass is more impactful and well-extended, but without compromising control and clarity. The Quintet's soundstage is wider and deeper, offering a more immersive experience compared to the KE4's narrower soundstage. The Quintet's highs are also more detailed and extended, while the KE4's are more relaxed. If you're looking for more technical precision, the Quintet is the better choice within Kiwiears, but the KE4 is still solid for a more balanced listening experience without as much focus on extreme detail.
• SUPERMIX 4 VS KE4
The Simgot Supermix 4 has a more bass-focused sound signature, with a more impactful and deeper bass response than the KE4. In terms of soundstage, the Supermix 4 has a wider soundstage, making it ideal for those looking for a more immersive listening experience. However, the KE4 offers superior control in the bass, keeping it tighter and more precise, which may be preferred for genres where excessive bass is not desirable. In the highs, the Supermix 4 can be a bit more aggressive compared to the KE4's more relaxed and controlled highs, which may make the KE4 a better choice for those looking for a smoother, fatigue-free listen.
• BLESSING 3 VS KE4
The Blessing 3 outperforms the KE4 in almost every technical aspect. It offers a wider, more three-dimensional soundstage, with superior instrument separation and better spatial positioning. The Blessing 3's mids have more body and texture, while the highs are more extended and detailed, providing greater clarity and resolution without being aggressive. The KE4, while well-balanced, has a more modest presentation in terms of soundstage and micro-details, but remains more relaxed and less demanding for long listens.
Last edited:
cqtek
1000+ Head-Fier
Pros: Very full sound based on the META curve.
- Good level of energy in the bass.
- Density, homogeneity, fullness in the mids, very enjoyable.
- Safe tuning.
- Comfort and ergonomics.
- Great sound level for the price.
- Excellent soundstage.
- Can be purchased in a pack for very little extra with the Allegro Mini dongle.
- The Allegro Mini dongle has two SE and BAL outputs for a very low price, plus a design that is very suitable for use with a smartphone.
- Good level of energy in the bass.
- Density, homogeneity, fullness in the mids, very enjoyable.
- Safe tuning.
- Comfort and ergonomics.
- Great sound level for the price.
- Excellent soundstage.
- Can be purchased in a pack for very little extra with the Allegro Mini dongle.
- The Allegro Mini dongle has two SE and BAL outputs for a very low price, plus a design that is very suitable for use with a smartphone.
Cons: Can be soft in treble or dark.
- Single set of tips.
- Shallow case in relation to the size of the capsules.
- Soft micro detail, not an analytical profile.
- The Allegro Mini dongle has a somewhat fair power rating.
- Single set of tips.
- Shallow case in relation to the size of the capsules.
- Soft micro detail, not an analytical profile.
- The Allegro Mini dongle has a somewhat fair power rating.
Introduction
Kiwi Ears, the Shenzhen, China-based brand, has been among the first to jump on the bandwagon of the so-called META frequency response. This new reference curve has emerged thanks to Brüel & Kjaer's new high-frequency head and torso simulator model 5128. The new measurements made with this new headband simulator have sparked a new debate in the world of headphones, as well as a revolution in what the new reference frequency response should look like. One way to simplify all this is to come to the conclusion of that response called META. And the Kiwi Ears KE4 has been tuned based on that frequency response. Actually, it's not the first or the only one, but the KE4s follow that current trend that raises the bass, narrows and balances the vertical range of that frequency response, smoothing and homogenising bass, upper midrange and treble. The result is a tuning with a powerful base, upper midrange and smooth, slightly dark treble. Is this curve the new neutral reference? I would never have come to that conclusion with my ears. But, I must admit that neutral references have always been too bland for me and I welcome a more bass-juicy and balanced reference, as META represents.
After all this, it is worth noting that the Kiwi Ears KE4 are IEMS whose design starts from scratch. It integrates an isobaric subwoofer system of two 10mm dynamic drivers combined with two BA drivers, one full-range (RAB 32257) and the other used for the treble (Knowles RAD 33518). The KE4s feature a three-way passive crossorver and three independent sound tubes, which allow for precise frequency separation and mixing. The housings are made of durable medical-grade resin, while the faceplates are hand-finished.
As if that wasn't enough, the Kiwi Ears KE4 can be paired with a small dongle called the Kiwi Ears Allegro Mini for just $10 more. This dongle costs $24 and is a curious T-shaped device with a USB Type-C connection in the centre of a bar with different audio connections (SE 3.5mm and BAL 4.4mm) at each end. It supports PCM 32bit/384kHz and DSD128 audio resolution.
Specifications
Packaging
As this is a double review I'm going to be a little more concise. The Kiwi Ears KE4 come in an eminently black box, measuring 131x112x66mm. On the main side is the brand logo at the top, the slogan on the right, a realistic photo in the centre and the model name at the bottom. The lettering is white and the design is in BN. The specifications are on the side, while the back side contains information about the brand and the certifications the product has. Once the cardboard is removed, the box is black with the brand logo in the centre in mirror silver ink. The IEMS are embedded in a foam plate lined with black cardboard. On the second layer is the brand's classic case, in a narrow version, inside a foam mould. The complete contents are as follows:
A single set of tips is too little for a 200$ model, even if they are of a particular model. On the other hand, brands should think about people with larger ear canals, because, unfortunately, even the L model doesn't fit my morphology. The zippered case is too narrow for the size of the capsules. The brand itself has thicker cases that would have been more convenient. The cable is good, but I still miss a balanced version. Very fair accessories for the price.
The Allegro Mini comes in a small white cardboard box whose dimensions are 67x67x16mm. There is a drawing of the product profile in the centre of the main side, the logo is at the top and the model at the bottom, all in black lettering. On the back there are the brand's contact details. Inside is a black card with product specifications in several languages. The dongle is inside a black foam mould. There is nothing else, no cables, no USB Type-A adapters.
Construction and Design
The capsules of the Kiwi Ears KE4 are made of black medical-grade resin, while the outer plates are hand-finished. The capsule design is semi-custom, yet thick, and the mouthpiece is short and metallic, in two steps. The inner diameter of the mouthpiece is 5mm, while the crown measures 6mm. The 2Pin 0.78mm connections are gold-plated and are embedded in the capsules themselves, so that they remain shallow. The outer face may be reminiscent of the African continent, albeit narrower. They are silver and shiny, with the logo engraved in the centre. On the rim of the capsule, on the narrow side, there is a regular hole protected by a metal grid. The inner side is ergonomically shaped, but without raised protrusions. The mouthpieces are slightly projected on an inclined base. They are made of metal and protected by a metal grid with straight grooves. On the inner side of each capsule is written the text C-1563 and the letter indicating the channel underneath, in gold ink.
The cable has four intertwined strands, each with a dark copper colour. The plug sleeve is a smooth, shiny metal cylinder. It has a recessed ring on the side of the 3.5mm SE gold-plated connector, while the other end has two and a transparent plastic shield that protects the cable outlet. The splitter piece is of the same type, but half the size. The pin is a shiny metal disc with two holes inside, it does a good job of fitting the cables, as it is not easy to slip. The sleeves of the 2Pin 0.78mm connectors are two smooth, shiny cylinders, with two slots near the cable exit, where their shape becomes slightly conical. The two pins are mounted on rectangular black plastic bases. The cable has ear guides.
The Kiwi Ears Allegro Mini is a slim, rectangular pickup with a lightweight, micro-sandblasted aluminium alloy housing. It features the brand logo in a depressed circle in its centre. On each narrow side face are the audio outputs. The 4.4mm balanced output is gold-plated, while the 3.5mm SE output is not. The USB Type-C connector is in the centre of the long side, while on its back is a black piece that also reaches the audio connections. On the underside of the dongle is engraved the model name. The dimensions of the rectangular dongle are 38x16x12mm excluding the USB connector, while if you count the width it reaches 24mm.
Adjustment and Ergonomics
The capsules are thick and have a pronounced semi-custom shape. They have a slender outer side, while the curves of the inner side are not very pronounced, so they are not too obtrusive. It is clear that they are looking for a coupling in our pinna, but, because the mouthpieces are short and not very projected, the insertion is quite shallow, at least in my case. In this way, the capsules anchor themselves quite naturally and smoothly to the outer parts of my ears. There is hardly any rotation once seated and the fit is occlusive and very durable. Being made of resin, their weight is low, which prolongs the comfort of the set. Despite their thickness, the integration with the cable is very well achieved and they are very suitable for daily and outdoor use, as well as for long listening. The level of insulation is high.
Allegro Mini Measurements
The specifications of the Allegro Mini dongle claim a power of 30mW, but do not specify the output, either SE or BAL. My measurements give a value for SE with no load of 0.94V RMS, while with a 33Ω load, the output is 0.925V RMS, which produces a power of 26mW RMS.
For BAL the output is just as powerful. With no load 0.94V RMS, with a 33Ω load it gives 0.927V RMS, which generates a power of 26mW RMS.
To give 30mW power at 32Ω 0.98V RMS is needed. The Allegro Mini is close.
On the other hand, it is strange that the power is the same for both SE and BAL outputs, when normally twice as much power is achieved by BAL. So one can wonder how this balanced output is actually implemented.
Finally, as can be seen in the pictures below, the output impedance for SE and BAL are less than 1Ω, which is very much appreciated.
In conclusion, the Allegro Mini is capable of driving the KE4s with ease, but 1V is a low output for some of the harder IEMS to drive. You could say it's the standard minimum.
Sound
Profile
Well, the profile of the Kiwi Ears KE4 has been based on the new META curve achieved thanks to the new Brüel & Kjaer model 5128 high-frequency head and torso simulator. Transposed to our classic IEC60318-4 01 Occluded-ear Simulator microphone, the frequency response has a maintained emphasis on the sub-bass all the way to the mid-bass. The mid-range roll-off is slight and remains smooth from 200Hz to 20kHz, avoiding the classic IEMS V-shaped dip. The upper mids are slightly emphasised, while the entry into the treble is subtly decreasing down to the air zone. The amplitude of the entire frequency range is 10dB, which indicates how balanced the KE4's response is. All this, extrapolated to music, implies that the KE4 has a strong, deep base, with balanced, even mids and smooth highs. Some might say that this is a somewhat dark sound, but it is not deliberately warm, although it is more so than bright. It is definitely a full, dense and complete sound.
For the following review I have used several dongles to maximise the potential of the KE4s and compared the Kiwi Ears Allegro Mini against another dongle in its price range.
Bass
Using a good source you get the full potential of the Kiwi Ears KE4. Where, at first, using the Allegro Mini, I felt the bass was a bit rubbery, springy and slower, with the Go Bar Kensei it feels very dry, precise and faster. True, the texture also becomes smoother, but it feels more technical, skilled and capable. I go straight to the very low frequency pure tone test expecting a great result. And so it is, at the 20Hz tone you get that mix of sensory vibration, barely audible, deep and far from unreal vibrational character. As the frequencies increase, the power and density rise, while maintaining that natural, deep and physical perception of the bass. Undoubtedly, the KE4s have a great behaviour when the source allows it, generating pure, firm, real, powerful and deep tones, far away from any unnatural vibratory character. It is canonic bass, but extended, with more body and volume. Its power is relatively high, I could never say that it is a neutral bass, because it has a very good presence in the overall music and quite a lot of punch. But it is also true that it appears when it is needed and has a great respect for the rest of the frequencies. Perhaps it is not the cleanest bass against the mids, as it drags body and warmth in that initial part of the central range. But that's just the search for a much fuller, denser and more complete midrange. On the other hand, it could also be said that it is not the darkest of the basses and that is conditioned by that extended curve towards the mid bass. However, this gives it that extension, punch, body and volume to the range, but it also penalises it a little in terms of dissipation speed and presence in the environment. Those looking for that clean, completely dry, ambient-friendly bass may find the presence generated by the KE4 too much. But it's also something that can be corrected with a bold source. As always, in that balance is the presence of texture, fun, elasticity, rumble, power, volume on the one hand and dynamism, decay, speed, dryness, resolution and precision on the other. The KE4s lean towards the first side and I like that.
In the unfiltered bass test, the quality of the KE4s is evident, showing itself to be skilful and very capable in the worst conditions. It is adept at recreating complex and dirty bass lines, maintaining control in the most difficult situations, always sounding natural, restrained, but powerful. Perhaps the bass is more noticeable than sensory, but even in this less advantageous scenario the KE4s don't let up. In this delicate test, the bass generated by the KE4s never seems invasive, overbearing or unrealistic, drawing lines and layers that are very natural sonically, knowing how to stratify the bass drums and separating it from those dirty continuous bases. You even get the feeling that KE4 get better the more time they spend in this swampy, complex terrain. Excellent.
Mids
It is in the mids that this new META tuning is a success. Fans who have been reading my previous reviews will have noticed that one of the terms I have been repeating lately has been ‘hollowness’. In classical tunings, the upper mids are often emphasised in search of ‘forced’ clarity and transparency. On the other hand, the lower mids feel light, thin, lacking in body and physicality. And that's something that creates that hollow feeling that I abhor. Sometimes it can be fixed by adding warmth and softening the upper area. But many times it results in a dark profile that doesn't resolve the situation, and even harms the clarity of the sound. However, I think the KE4s have found the perfect balance throughout the range. I perceive the male voices as full, with a very precise, natural and realistic timbre. They have a deep, full, dense base, but never sound muddy or too close. Their presence is broad, balanced, complete from the base to the harmonics, showing their whole composition in a precise and homogeneous way. Best of all, this perception extends to all the instruments based in this first half of the mids. A real pleasure.
On the other side are the female voices. Being a purist I am obliged to say that they sound a little drier, warmer and with less sparkle. Maybe it's habit, but my ears are more accustomed to perceiving that more vivid point of brightness in them. By contrast, the upper mids are neutral, subtly dark, but very musical. The female voices gain in texture, offering a richness in their base that I have rarely enjoyed. In their details, the projection is more restrained, with a more limited and less fine extension. Those looking for the metal edge in guitars won't find it here, as the KE4s offer a much more restrained, drier, less juicy and very little splashy sound. Sibilance tends to zero and brightness is soft, though it's not a dull sound by any means. The virtue of the KE4s' upper mids is their level of resolution. Despite that wiry musical feel, the upper mids are not sterile, withered or wilted. Perhaps the more appropriate term is ‘neutral’. And anyone who doesn't see it that way should look the other way.
It is only after a few hours with the KE4 and a good source that one realises the absorbing, three-dimensional capacity of its midrange. It is a very pleasant place, very musical, rich, immersive, surrounding and full of space, depth, without being analytical, cold or piercing. Perhaps, to put a downside, the micro detail is not the most resolute and you have to look hard to find it.
Treble
It could not be otherwise. The treble is somewhat softer and more nuanced than what I would consider neutral. I miss a little more sparkle and a slightly finer, sharper, more delicate and energetic presentation. Even so, the treble maintains a natural, slightly warm, calm and subtly thick sonority. It is a treble that does not crunch, but retains a good level both representative and informative, without losing sight of the extension or the level of resolution. In this way, it is very easy to succumb to this musical sonority.
Again, the surprise comes when playing my test tracks for treble: at first I missed that more penetrating brilliance. But as I played back the songs I realised that the KE4's treble is much richer and more realistic than I first perceived. In Crescendo.
Soundstage, Separation
The Kiwi Ears KE4 are outstanding on soundstage. Without being too big in size, the surrounding and immersive feeling is something that grabs you. It's easy to feel at the centre of the music with a good source. Thus, the scene can be perceived as semi-spherical, even slightly more so, with an incipient perception under the feet and better over the head and behind it. The sense of space and separation is evident, without being incoherent or exaggerated. On the other hand, the sound is deep, dynamic, with fast transients, tonally accurate and timbrally realistic. Perhaps it could be said to be a little dry in that respect. But the level of musical richness and the very pleasant feeling it provokes make these minor shortcomings forgivable. Including certain limitations in the expression of micro detail. The balance, the homogeneity and the size of the music make us forget those aspects more common in more analytical and cold profiles. Not forgetting that we are talking about $200 IEMS.
On the other hand, the positioning of the elements is surrounding. It is not too ethereal or vaporous to appear diluted, but the KE4s maintain a high level of cohesion to draw them in a concrete and precise way, displaying an excellent level of resolution. In this way, the elements have a real, corporeal and perceptible form. This reinforces the very natural immersive feel of the music.
Comparisons
Yanyin Aladdin vs Kiwi Ears KE4
Maybe the META curve didn't exist, but warm and soft tunings in upper mids have always existed. And the Yanyin Aladdin was one of those models. Released in 2021, the Aladdin is a hybrid with 9.2mm 1DD and 3BA. They have a semi-custom shape and are built in resin, similar to the KE4, but are smaller. They came with two sets of tips, a leather pouch and a silver plated cable. Their starting price was around $250, if not more. But more expensive than the KE4's. In terms of integration and ergonomics, the slightly smaller size makes the Aladdin's integration in my ears somewhat better.
In terms of tuning, the Aladdin's bass is subtly cleaner. They have a little more meat in the midrange, while the upper midrange is smoother, as well as the treble, with less extension than the KE4s. They need less energy to generate the same sound pressure.
The low end is very similar. The pure tone test establishes this. But the KE4s have a bit more body, darkness, volume, energy and rumble. The Aladdin's are a bit cleaner and drier.
The Aladdin's higher energy between 1000Hz and 2000Hz pushes the male voices, even partially the female voices, a bit more than the KE4s, achieving a bit more clarity in that respect. Then, despite the Aladdin's lower energy in the upper mids, they sound very clean, close, transparent and clear. This is surprising comparatively speaking. The KE4s have denser mids, with more weight, with a more physical low end, even a bit darker. The Aladdin's sound a bit freer.
The Aladdin's highs seem more nuanced, but they have a bit of a highlight in the first highs, compared to the KE4s, so the sonority is not quite the same. After that, the KE4s have better extension and their sonority ends up being more coherent. I think there is a bit less control in the treble of the Aladdin.
The sense of density makes the KE4s seem to have less separation, but the scene is bigger, once you get inside their music. The perception of detail is very similar in both models. That softened, nuanced feel, with that darker, warmer point persists in both models and the micro detail suffers, though it's noticeable in both.
Hidizs SD2 vs Kiwi Ears Allegro Mini
The Allegro Mini DAC/AMP is really cheap ($24) for having SE and BAL outputs. It's a pity that it doesn't have much power (just under 1V RMS and 26mW RMS according to my measurements for 33Ω). The Hidizs SD2 is priced at $40 and provides higher power (1.5V RMS and 68mW RMS for 33Ω by my measurements). But it has only one SE output. Both have a mic line and can be used with a cable that has a built-in mic. The Hidisz uses the ES9270 DAC, while Kiwi Ears does not specify the chip model used.
Is there much difference in sound between the two? No. The Allegro Mini drives the KE4s well, but for more demanding things I prefer the SD2 with more than twice the power.
One thing that can be a nuisance on the SD2 is the Fade-In it has when playback starts.
In the very low frequency pure tone test the behaviour of both is very similar. They are not the most controlled and realistic LFOs among the dongles I have, but the performance is very similar. Perhaps there is subtly more control in the SD2. The result is an adequate bass, without too many frills, tight and well executed in both models.
In the mids the Allegro Mini seems a little warmer, while the SD2s seem to have a point of better definition, a little more separation and transparency. That warmth of the Allegro Mini limits the stage feel, even sounding subtly more faded. The SD2s have a bit more light, a higher point of definition and resolution. And that's something you notice in the mids and highs.
Macro detail is evident in both products, but the darker, better-defined background of the SD2s gives them an advantage when it comes to reproducing micro detail, which is sharper and more polished.
Conclusion
The new Meta reference curve has been one of the most talked about events in the audiophile world. Since then, a number of products based on it have started to emerge. The Kiwi Ears KE4 is one of them. Based on a great low end, with a dense and full transition into the upper mids, upper mids and smooth highs. The KE4s are very solid, homogeneous, balanced and full IEMS. For some, they may be dark and bass-excited. For me they are IEMS that fill the hollowness and emptiness I find in the lower mids of many models, while maintaining a remarkable level of energy in the bass. All of that is to my taste, including the smoothness in the upper mids and the balance in the treble. Perhaps I miss a little more sparkle or analytical ability. But, for now, in this price range you still have to choose between one thing (analytical profile) and the other (warmer, more musical profile). What is beyond doubt is how much I enjoyed listening to music while writing this review of the Kiwi Ears KE4. And I can't always say that. Perhaps that's the best praise.
On the other hand, the Kiwi Ears KE4 can be purchased in a bargain-priced bundle with a dongle called the Allegro Mini, just $10 more. Priced individually at $24, this dongle has a T-shape that houses the USB Type-C connection in the middle, a 3.5mm SE output on one side and a 4.4mm BAL output on the other. It's capable of delivering 1V RMS on both ends and generates pretty good sound for its price, on par with slightly more expensive dongles. They may not be good enough to extract the full potential of the KE4s, but they can be a very economical, if not the cheapest, option with SE and BAL outputs, plus cable support with microphone. Little more can be asked for that price.
Sources Used During the Analysis
Purchase Link
You can read the full review in Spanish here
Kiwi Ears, the Shenzhen, China-based brand, has been among the first to jump on the bandwagon of the so-called META frequency response. This new reference curve has emerged thanks to Brüel & Kjaer's new high-frequency head and torso simulator model 5128. The new measurements made with this new headband simulator have sparked a new debate in the world of headphones, as well as a revolution in what the new reference frequency response should look like. One way to simplify all this is to come to the conclusion of that response called META. And the Kiwi Ears KE4 has been tuned based on that frequency response. Actually, it's not the first or the only one, but the KE4s follow that current trend that raises the bass, narrows and balances the vertical range of that frequency response, smoothing and homogenising bass, upper midrange and treble. The result is a tuning with a powerful base, upper midrange and smooth, slightly dark treble. Is this curve the new neutral reference? I would never have come to that conclusion with my ears. But, I must admit that neutral references have always been too bland for me and I welcome a more bass-juicy and balanced reference, as META represents.
After all this, it is worth noting that the Kiwi Ears KE4 are IEMS whose design starts from scratch. It integrates an isobaric subwoofer system of two 10mm dynamic drivers combined with two BA drivers, one full-range (RAB 32257) and the other used for the treble (Knowles RAD 33518). The KE4s feature a three-way passive crossorver and three independent sound tubes, which allow for precise frequency separation and mixing. The housings are made of durable medical-grade resin, while the faceplates are hand-finished.
As if that wasn't enough, the Kiwi Ears KE4 can be paired with a small dongle called the Kiwi Ears Allegro Mini for just $10 more. This dongle costs $24 and is a curious T-shaped device with a USB Type-C connection in the centre of a bar with different audio connections (SE 3.5mm and BAL 4.4mm) at each end. It supports PCM 32bit/384kHz and DSD128 audio resolution.
Specifications
- Driver Type: 2 DD 10mm for bass, 1 custom BA RAB-32257 for midrange and 1 BA Knowles RAD-33518 for treble.
- Sensitivity: 102dB (±1dB).
- Impedance: 28Ω.
- Three-way crossover frequency.
- Jack connector: SE 3.5mm gold-plated.
- Cartridge Connection Type: 2Pin 0.78mm.
- Starting price: $199 (Kiwi Ears KE4), $223 (Kiwi Ears KE4 + Allegro Mini). Special set price $209.
- DAC: Built-in DAC/Amp chip.
- THD+N < 0.004% (32Ω load, A-weighted).
- Output power: ≥ 30mW (32Ω, THD+N < 1%).
- SNR: ≥ 114dB (32Ω load, A-weighted).
- Frequency response: ±0.2dB (20-20KHz).
- Noise floor: < 3μV (A-weighted).
- Supported Formats: PCM (up to 32bit/384kHz), DSD (DSD128, DSD64)
- Output: USB C to 3.5/4.4mm.
Packaging
As this is a double review I'm going to be a little more concise. The Kiwi Ears KE4 come in an eminently black box, measuring 131x112x66mm. On the main side is the brand logo at the top, the slogan on the right, a realistic photo in the centre and the model name at the bottom. The lettering is white and the design is in BN. The specifications are on the side, while the back side contains information about the brand and the certifications the product has. Once the cardboard is removed, the box is black with the brand logo in the centre in mirror silver ink. The IEMS are embedded in a foam plate lined with black cardboard. On the second layer is the brand's classic case, in a narrow version, inside a foam mould. The complete contents are as follows:
- The two Kiwi Ears KE4 capsules.
- A black zipped case.
- One user manual.
- One 4-strand cable with SE 3.5mm connector.
- One set of white silicone Kiwi Ears Flex Eartips.
- Two pairs of filters for mouthpiece protection.
A single set of tips is too little for a 200$ model, even if they are of a particular model. On the other hand, brands should think about people with larger ear canals, because, unfortunately, even the L model doesn't fit my morphology. The zippered case is too narrow for the size of the capsules. The brand itself has thicker cases that would have been more convenient. The cable is good, but I still miss a balanced version. Very fair accessories for the price.
The Allegro Mini comes in a small white cardboard box whose dimensions are 67x67x16mm. There is a drawing of the product profile in the centre of the main side, the logo is at the top and the model at the bottom, all in black lettering. On the back there are the brand's contact details. Inside is a black card with product specifications in several languages. The dongle is inside a black foam mould. There is nothing else, no cables, no USB Type-A adapters.
Construction and Design
The capsules of the Kiwi Ears KE4 are made of black medical-grade resin, while the outer plates are hand-finished. The capsule design is semi-custom, yet thick, and the mouthpiece is short and metallic, in two steps. The inner diameter of the mouthpiece is 5mm, while the crown measures 6mm. The 2Pin 0.78mm connections are gold-plated and are embedded in the capsules themselves, so that they remain shallow. The outer face may be reminiscent of the African continent, albeit narrower. They are silver and shiny, with the logo engraved in the centre. On the rim of the capsule, on the narrow side, there is a regular hole protected by a metal grid. The inner side is ergonomically shaped, but without raised protrusions. The mouthpieces are slightly projected on an inclined base. They are made of metal and protected by a metal grid with straight grooves. On the inner side of each capsule is written the text C-1563 and the letter indicating the channel underneath, in gold ink.
The cable has four intertwined strands, each with a dark copper colour. The plug sleeve is a smooth, shiny metal cylinder. It has a recessed ring on the side of the 3.5mm SE gold-plated connector, while the other end has two and a transparent plastic shield that protects the cable outlet. The splitter piece is of the same type, but half the size. The pin is a shiny metal disc with two holes inside, it does a good job of fitting the cables, as it is not easy to slip. The sleeves of the 2Pin 0.78mm connectors are two smooth, shiny cylinders, with two slots near the cable exit, where their shape becomes slightly conical. The two pins are mounted on rectangular black plastic bases. The cable has ear guides.
The Kiwi Ears Allegro Mini is a slim, rectangular pickup with a lightweight, micro-sandblasted aluminium alloy housing. It features the brand logo in a depressed circle in its centre. On each narrow side face are the audio outputs. The 4.4mm balanced output is gold-plated, while the 3.5mm SE output is not. The USB Type-C connector is in the centre of the long side, while on its back is a black piece that also reaches the audio connections. On the underside of the dongle is engraved the model name. The dimensions of the rectangular dongle are 38x16x12mm excluding the USB connector, while if you count the width it reaches 24mm.
Adjustment and Ergonomics
The capsules are thick and have a pronounced semi-custom shape. They have a slender outer side, while the curves of the inner side are not very pronounced, so they are not too obtrusive. It is clear that they are looking for a coupling in our pinna, but, because the mouthpieces are short and not very projected, the insertion is quite shallow, at least in my case. In this way, the capsules anchor themselves quite naturally and smoothly to the outer parts of my ears. There is hardly any rotation once seated and the fit is occlusive and very durable. Being made of resin, their weight is low, which prolongs the comfort of the set. Despite their thickness, the integration with the cable is very well achieved and they are very suitable for daily and outdoor use, as well as for long listening. The level of insulation is high.
Allegro Mini Measurements
The specifications of the Allegro Mini dongle claim a power of 30mW, but do not specify the output, either SE or BAL. My measurements give a value for SE with no load of 0.94V RMS, while with a 33Ω load, the output is 0.925V RMS, which produces a power of 26mW RMS.
For BAL the output is just as powerful. With no load 0.94V RMS, with a 33Ω load it gives 0.927V RMS, which generates a power of 26mW RMS.
To give 30mW power at 32Ω 0.98V RMS is needed. The Allegro Mini is close.
On the other hand, it is strange that the power is the same for both SE and BAL outputs, when normally twice as much power is achieved by BAL. So one can wonder how this balanced output is actually implemented.
Finally, as can be seen in the pictures below, the output impedance for SE and BAL are less than 1Ω, which is very much appreciated.
In conclusion, the Allegro Mini is capable of driving the KE4s with ease, but 1V is a low output for some of the harder IEMS to drive. You could say it's the standard minimum.
Sound
Profile
Well, the profile of the Kiwi Ears KE4 has been based on the new META curve achieved thanks to the new Brüel & Kjaer model 5128 high-frequency head and torso simulator. Transposed to our classic IEC60318-4 01 Occluded-ear Simulator microphone, the frequency response has a maintained emphasis on the sub-bass all the way to the mid-bass. The mid-range roll-off is slight and remains smooth from 200Hz to 20kHz, avoiding the classic IEMS V-shaped dip. The upper mids are slightly emphasised, while the entry into the treble is subtly decreasing down to the air zone. The amplitude of the entire frequency range is 10dB, which indicates how balanced the KE4's response is. All this, extrapolated to music, implies that the KE4 has a strong, deep base, with balanced, even mids and smooth highs. Some might say that this is a somewhat dark sound, but it is not deliberately warm, although it is more so than bright. It is definitely a full, dense and complete sound.
For the following review I have used several dongles to maximise the potential of the KE4s and compared the Kiwi Ears Allegro Mini against another dongle in its price range.
Bass
Using a good source you get the full potential of the Kiwi Ears KE4. Where, at first, using the Allegro Mini, I felt the bass was a bit rubbery, springy and slower, with the Go Bar Kensei it feels very dry, precise and faster. True, the texture also becomes smoother, but it feels more technical, skilled and capable. I go straight to the very low frequency pure tone test expecting a great result. And so it is, at the 20Hz tone you get that mix of sensory vibration, barely audible, deep and far from unreal vibrational character. As the frequencies increase, the power and density rise, while maintaining that natural, deep and physical perception of the bass. Undoubtedly, the KE4s have a great behaviour when the source allows it, generating pure, firm, real, powerful and deep tones, far away from any unnatural vibratory character. It is canonic bass, but extended, with more body and volume. Its power is relatively high, I could never say that it is a neutral bass, because it has a very good presence in the overall music and quite a lot of punch. But it is also true that it appears when it is needed and has a great respect for the rest of the frequencies. Perhaps it is not the cleanest bass against the mids, as it drags body and warmth in that initial part of the central range. But that's just the search for a much fuller, denser and more complete midrange. On the other hand, it could also be said that it is not the darkest of the basses and that is conditioned by that extended curve towards the mid bass. However, this gives it that extension, punch, body and volume to the range, but it also penalises it a little in terms of dissipation speed and presence in the environment. Those looking for that clean, completely dry, ambient-friendly bass may find the presence generated by the KE4 too much. But it's also something that can be corrected with a bold source. As always, in that balance is the presence of texture, fun, elasticity, rumble, power, volume on the one hand and dynamism, decay, speed, dryness, resolution and precision on the other. The KE4s lean towards the first side and I like that.
In the unfiltered bass test, the quality of the KE4s is evident, showing itself to be skilful and very capable in the worst conditions. It is adept at recreating complex and dirty bass lines, maintaining control in the most difficult situations, always sounding natural, restrained, but powerful. Perhaps the bass is more noticeable than sensory, but even in this less advantageous scenario the KE4s don't let up. In this delicate test, the bass generated by the KE4s never seems invasive, overbearing or unrealistic, drawing lines and layers that are very natural sonically, knowing how to stratify the bass drums and separating it from those dirty continuous bases. You even get the feeling that KE4 get better the more time they spend in this swampy, complex terrain. Excellent.
Mids
It is in the mids that this new META tuning is a success. Fans who have been reading my previous reviews will have noticed that one of the terms I have been repeating lately has been ‘hollowness’. In classical tunings, the upper mids are often emphasised in search of ‘forced’ clarity and transparency. On the other hand, the lower mids feel light, thin, lacking in body and physicality. And that's something that creates that hollow feeling that I abhor. Sometimes it can be fixed by adding warmth and softening the upper area. But many times it results in a dark profile that doesn't resolve the situation, and even harms the clarity of the sound. However, I think the KE4s have found the perfect balance throughout the range. I perceive the male voices as full, with a very precise, natural and realistic timbre. They have a deep, full, dense base, but never sound muddy or too close. Their presence is broad, balanced, complete from the base to the harmonics, showing their whole composition in a precise and homogeneous way. Best of all, this perception extends to all the instruments based in this first half of the mids. A real pleasure.
On the other side are the female voices. Being a purist I am obliged to say that they sound a little drier, warmer and with less sparkle. Maybe it's habit, but my ears are more accustomed to perceiving that more vivid point of brightness in them. By contrast, the upper mids are neutral, subtly dark, but very musical. The female voices gain in texture, offering a richness in their base that I have rarely enjoyed. In their details, the projection is more restrained, with a more limited and less fine extension. Those looking for the metal edge in guitars won't find it here, as the KE4s offer a much more restrained, drier, less juicy and very little splashy sound. Sibilance tends to zero and brightness is soft, though it's not a dull sound by any means. The virtue of the KE4s' upper mids is their level of resolution. Despite that wiry musical feel, the upper mids are not sterile, withered or wilted. Perhaps the more appropriate term is ‘neutral’. And anyone who doesn't see it that way should look the other way.
It is only after a few hours with the KE4 and a good source that one realises the absorbing, three-dimensional capacity of its midrange. It is a very pleasant place, very musical, rich, immersive, surrounding and full of space, depth, without being analytical, cold or piercing. Perhaps, to put a downside, the micro detail is not the most resolute and you have to look hard to find it.
Treble
It could not be otherwise. The treble is somewhat softer and more nuanced than what I would consider neutral. I miss a little more sparkle and a slightly finer, sharper, more delicate and energetic presentation. Even so, the treble maintains a natural, slightly warm, calm and subtly thick sonority. It is a treble that does not crunch, but retains a good level both representative and informative, without losing sight of the extension or the level of resolution. In this way, it is very easy to succumb to this musical sonority.
Again, the surprise comes when playing my test tracks for treble: at first I missed that more penetrating brilliance. But as I played back the songs I realised that the KE4's treble is much richer and more realistic than I first perceived. In Crescendo.
Soundstage, Separation
The Kiwi Ears KE4 are outstanding on soundstage. Without being too big in size, the surrounding and immersive feeling is something that grabs you. It's easy to feel at the centre of the music with a good source. Thus, the scene can be perceived as semi-spherical, even slightly more so, with an incipient perception under the feet and better over the head and behind it. The sense of space and separation is evident, without being incoherent or exaggerated. On the other hand, the sound is deep, dynamic, with fast transients, tonally accurate and timbrally realistic. Perhaps it could be said to be a little dry in that respect. But the level of musical richness and the very pleasant feeling it provokes make these minor shortcomings forgivable. Including certain limitations in the expression of micro detail. The balance, the homogeneity and the size of the music make us forget those aspects more common in more analytical and cold profiles. Not forgetting that we are talking about $200 IEMS.
On the other hand, the positioning of the elements is surrounding. It is not too ethereal or vaporous to appear diluted, but the KE4s maintain a high level of cohesion to draw them in a concrete and precise way, displaying an excellent level of resolution. In this way, the elements have a real, corporeal and perceptible form. This reinforces the very natural immersive feel of the music.
Comparisons
Yanyin Aladdin vs Kiwi Ears KE4
Maybe the META curve didn't exist, but warm and soft tunings in upper mids have always existed. And the Yanyin Aladdin was one of those models. Released in 2021, the Aladdin is a hybrid with 9.2mm 1DD and 3BA. They have a semi-custom shape and are built in resin, similar to the KE4, but are smaller. They came with two sets of tips, a leather pouch and a silver plated cable. Their starting price was around $250, if not more. But more expensive than the KE4's. In terms of integration and ergonomics, the slightly smaller size makes the Aladdin's integration in my ears somewhat better.
In terms of tuning, the Aladdin's bass is subtly cleaner. They have a little more meat in the midrange, while the upper midrange is smoother, as well as the treble, with less extension than the KE4s. They need less energy to generate the same sound pressure.
The low end is very similar. The pure tone test establishes this. But the KE4s have a bit more body, darkness, volume, energy and rumble. The Aladdin's are a bit cleaner and drier.
The Aladdin's higher energy between 1000Hz and 2000Hz pushes the male voices, even partially the female voices, a bit more than the KE4s, achieving a bit more clarity in that respect. Then, despite the Aladdin's lower energy in the upper mids, they sound very clean, close, transparent and clear. This is surprising comparatively speaking. The KE4s have denser mids, with more weight, with a more physical low end, even a bit darker. The Aladdin's sound a bit freer.
The Aladdin's highs seem more nuanced, but they have a bit of a highlight in the first highs, compared to the KE4s, so the sonority is not quite the same. After that, the KE4s have better extension and their sonority ends up being more coherent. I think there is a bit less control in the treble of the Aladdin.
The sense of density makes the KE4s seem to have less separation, but the scene is bigger, once you get inside their music. The perception of detail is very similar in both models. That softened, nuanced feel, with that darker, warmer point persists in both models and the micro detail suffers, though it's noticeable in both.
Hidizs SD2 vs Kiwi Ears Allegro Mini
The Allegro Mini DAC/AMP is really cheap ($24) for having SE and BAL outputs. It's a pity that it doesn't have much power (just under 1V RMS and 26mW RMS according to my measurements for 33Ω). The Hidizs SD2 is priced at $40 and provides higher power (1.5V RMS and 68mW RMS for 33Ω by my measurements). But it has only one SE output. Both have a mic line and can be used with a cable that has a built-in mic. The Hidisz uses the ES9270 DAC, while Kiwi Ears does not specify the chip model used.
Is there much difference in sound between the two? No. The Allegro Mini drives the KE4s well, but for more demanding things I prefer the SD2 with more than twice the power.
One thing that can be a nuisance on the SD2 is the Fade-In it has when playback starts.
In the very low frequency pure tone test the behaviour of both is very similar. They are not the most controlled and realistic LFOs among the dongles I have, but the performance is very similar. Perhaps there is subtly more control in the SD2. The result is an adequate bass, without too many frills, tight and well executed in both models.
In the mids the Allegro Mini seems a little warmer, while the SD2s seem to have a point of better definition, a little more separation and transparency. That warmth of the Allegro Mini limits the stage feel, even sounding subtly more faded. The SD2s have a bit more light, a higher point of definition and resolution. And that's something you notice in the mids and highs.
Macro detail is evident in both products, but the darker, better-defined background of the SD2s gives them an advantage when it comes to reproducing micro detail, which is sharper and more polished.
Conclusion
The new Meta reference curve has been one of the most talked about events in the audiophile world. Since then, a number of products based on it have started to emerge. The Kiwi Ears KE4 is one of them. Based on a great low end, with a dense and full transition into the upper mids, upper mids and smooth highs. The KE4s are very solid, homogeneous, balanced and full IEMS. For some, they may be dark and bass-excited. For me they are IEMS that fill the hollowness and emptiness I find in the lower mids of many models, while maintaining a remarkable level of energy in the bass. All of that is to my taste, including the smoothness in the upper mids and the balance in the treble. Perhaps I miss a little more sparkle or analytical ability. But, for now, in this price range you still have to choose between one thing (analytical profile) and the other (warmer, more musical profile). What is beyond doubt is how much I enjoyed listening to music while writing this review of the Kiwi Ears KE4. And I can't always say that. Perhaps that's the best praise.
On the other hand, the Kiwi Ears KE4 can be purchased in a bargain-priced bundle with a dongle called the Allegro Mini, just $10 more. Priced individually at $24, this dongle has a T-shape that houses the USB Type-C connection in the middle, a 3.5mm SE output on one side and a 4.4mm BAL output on the other. It's capable of delivering 1V RMS on both ends and generates pretty good sound for its price, on par with slightly more expensive dongles. They may not be good enough to extract the full potential of the KE4s, but they can be a very economical, if not the cheapest, option with SE and BAL outputs, plus cable support with microphone. Little more can be asked for that price.
Sources Used During the Analysis
- Kiwi Ears Allegro Mini.
- iFi GO bar Kensei.
- Hidizs SD2.
- Burson Audio Playmate 2.
- Aune X8 XVIII Magic DAC + EarMen ST-Amp.
Linsoul Audio Store, offered me this model, in exchange for writing an honest review. I want to make it clear that all my opinions written in this review have not been conditioned by this fact, nor will I ever write anything that I do not really think or feel here. I will only write about my personal opinion in relation to the revised product.
Purchase Link
You can read the full review in Spanish here
o0genesis0o
When I skimmed through quickly, I though you measure output impedance of the IEM 
Didn't see you also measure the allegro. Great review, mate.
Didn't see you also measure the allegro. Great review, mate.
wolfstar76
Headphoneus Supremus
Pros: Clean and clear sound signature
All day easy listening without fatiguing
Rumbling sub-bass
Hard to nick pick for an entry-level all-rounder at this price range
Overall good package for the price
All day easy listening without fatiguing
Rumbling sub-bass
Hard to nick pick for an entry-level all-rounder at this price range
Overall good package for the price
Cons: Not for bass-head even it has good quality bass
Well-controlled treble leads to a feeling of not so resolving
Stock cable comes only with 3.5mm termination (for the love of the KE4, get a better cable)
Not much tips selection with the package
Well-controlled treble leads to a feeling of not so resolving
Stock cable comes only with 3.5mm termination (for the love of the KE4, get a better cable)
Not much tips selection with the package
I heard Kiwi Ears a lot in the past and most of my readings are very positive, but I have never heard any Kiwi Ears IEMs until toady when I received the new release from Kiwi Ears: KE4 with a current (after discount) retail price of $199.
A little bit introduction of myself. I am a regular headfier and spent most of my time of headfi in watercooler thread. However, I am by no means a regular reviewer and I usually only post my reviews from the watercooler tour organized by the legendary @Rockwell75 and my annual CanJam meet. My experience with Chifi starts with KZ AS10, and that was long time ago. Just like most of the headfiers, I ended up falling into this rabbit hole, and chasing more and more expensive audio gears. With my eyes always on those TOTL IEMs nowadays, sometimes reaching out for an entry level IEM such as Kiwi Ears KE4 is an eye-opening experience: the entry level IEMs nowadays can be pretty good, and it reminds us that the chasing of the last inch of improvement can be so marginal.
Now let's go back to the Kiwi Ears KE4.
The Design and Package
The KE4 is equipped with 4 drivers: 2 isobaric DD for bass (especially the sub-bass), and 2 BA for full-range and treble. Since it has 3-way passive crossover system, I suspect one of the BA is for full-range and another is for treble.
The shell design of the KE4 is a contoured resin with a glossy plate that bearing the Kiwi logo. The design results with a very comfortable fit and a good seal. Even though the package comes with only one type of tips with almost the same size, it fits very well without too much need of tips rolling.
With the package, the stock cable is a standard two-pin with a single-ended 3.5mm termination. The cable itself is good quality at this price range and it is very light and flexible to wear. For those who have a good 4.4mm cable, I strongly suggest you to try some cable rolling, IMO the KE4 is actually limited by its stock cable. I will talk about my cable rolling experience in the end of my sound impressions.
The packaging of the KE4 is very minimal but comes with a very nice hard-shell carry case, which is not common at this price range.
The Sound Impressions
Now let's talk about the most important part of the review: how does the KE4 sound like? If I have to use one word to describe KE4, it will be "easy-listening". Personally I think Kiwi Ears made a good decision regarding the sound signature of the KE4 as an entry-level all-rounder. For the price of the KE4, you can bring it on the go and you will be able to enjoy the music while doing your things.
I have been listening to the KE4 with DAPs, such as Sony NW-WM1Z, NW-WM1AM2, and R2R Hiby RS2. I also listened the streaming music from my laptop from Cayin RU6 dongle, and from my desktop setup with both solid state amp and tube amp, the KE4 clearly scales well with the source.
Something I need to point out is that the KE4 actually needs some juice to drive, I found out that I need to turn most of my source up, even more than the relatively hard to drive Sony IER-Z1R.
The first time you put the KE4 in your ears, you can immediately notice the sub-bass rumbling and the overall bass performance is something unexpected for this price range. It is definitely not a bass-head IEM, nor it intends that way. However, the quality of the bass is unexpectedly good in texture. However, the quantity of the bass is lower than what I expected when I learned that there are two DD in the KE4. The choice of the bass tone is also leaning towards sub-bass. You have all the rumbling, the thudding, and the pounding, but the bass is never the main role, it is played in the background. Since I am a confessed bass-head, personally I like more bass quantity, and especially more mid-bass. PS: after a cable rolling with Code 24, the KE4 has a complete change-over in its bass performance.
The strength of the KE4 is in its Mids. With singer/song writer genre and general pop music, you will have the vocal always in the center of the stage and in the spot light. The vocal is lush and sweet and clear. If your music library consisted of mostly of those genres, you will be in for a treat. It is very easy for you to wear the KE4 for an entire day listening to pop music and songs without too much distraction from the music.
The overall sound signature of the KE4 is a balanced warm U shape with the treble a little bit de-emphasized. Not that the treble is rolled off, or not extended enough, it is just not there with too much energy. For people who are sensitive to treble sibilance, the KE4 is a good news since you will never experience any. However, the treble in the KE4 is so well controlled it will give you the impression that the resolution of the KE4 is not high. In the beginning, I had the feeling that I could hear less details compared to my other high-end IEMs, but I found that if I paid enough attention, I actually could hear them. The details are still there, they are just not in your face and you tend to ignore them when you are listening to the vocal.
Regarding the sound stage and instrument separation, the KE4 performs pretty well at this price range, it will sound like an audiophile grade IEM. If you are an average Joe who used to wear TWS or some cheap earpieces, pick up a KE4 and listen to music with dongles, you will be surprised to how good it sounds.
Comparisons
As I don't have much experience at the entry-level IEMs, I will briefly compare the KE4 to some entry-level IEMs I currently own though all of them are significantly more expensive than the KE4.
Penon Audio Quattro is a 4 DD driver configured IEM priced at $399, which is twice as more expensive as KE4. The sound signature is actually quite similar with warm and lush Mids. The Quattro has a much lifted bass shelf with more bass quantity. It is another IEM that you can listen with all day long without fatiguing. In some sense, the Penon Quattro is a KE4 on steroid, but at half the price, you can have the KE4 for a similar experience.
Elysian Acoustic Labs Pilgrim is another IEM priced at $399 with 1 DD and 3BA. Though Pilgrim is never a baby Annihilator, it still shine with its treble performance. Pilgrim is a totally differently tuned IEM with a V shape sound signature. It is tuned with more fun factor, but it also requires more attention from you and it is not as easy going as the KE4.
The single BA Etymotic ER4XR is currently priced at $299, but it was priced much higher and used to be one of the benchmark IEM. With so many years passing by, you can see how the audiophile world evolved. Compared to ER4XR, which is a Mid-centric IEM, the KE4 is more enjoyable and of course, without having to deep insert and violating your ears.
Overall Conclusion (Cable Rolling)
Kiwi Ears KE4 is a really good all-rounder for those who either want to test the water of audiophile world without breaking your bank, or someone who want a set that you can bring out with you on the go without worrying about being lost or stolen in your trip. It will also be a good choice if you want to use your own IEM on an airplane, the 3.5mm stock cable is very handy for most the airlines. I remember that I was having trouble during many of my flights since all of my other IEMs terminated with 4.4mm and I cannot use them on the airplane. I would say that the KE4 is a very competitive offer at sub $300 range. Unless you are looking for a specialty IEM, such as a bass-head IEM or treble-head IEM, you will be very satisfied with the KE4 as a cheap all-rounder.
I did some comic style cable rolling: I switched the stock cable with an Effect Audio code 24. Yes, I am using a $799 cable on a $199 IEM. However, the result of the cable rolling is draw-dropping: the sound stage opens up a lot, and most importantly the bass is significantly improved with both quantity and impact. What I complained about having too few bass is not longer the case for this combo.
Some Sound-Tracks Used
It is one of the classic track to test bass and sub-bass:
Another very popular track for headphone testing:
Even though the KE4 is probably tuned for Western customers, it will be interesting to listen to some Eastern music:
This is one of my favorite tracks to test headphones for vocal performance:
You really need to get a better cable before listening to this track, the KE4 is a even much better all-rounder for hip hop.
A little bit introduction of myself. I am a regular headfier and spent most of my time of headfi in watercooler thread. However, I am by no means a regular reviewer and I usually only post my reviews from the watercooler tour organized by the legendary @Rockwell75 and my annual CanJam meet. My experience with Chifi starts with KZ AS10, and that was long time ago. Just like most of the headfiers, I ended up falling into this rabbit hole, and chasing more and more expensive audio gears. With my eyes always on those TOTL IEMs nowadays, sometimes reaching out for an entry level IEM such as Kiwi Ears KE4 is an eye-opening experience: the entry level IEMs nowadays can be pretty good, and it reminds us that the chasing of the last inch of improvement can be so marginal.
Now let's go back to the Kiwi Ears KE4.
The Design and Package
The KE4 is equipped with 4 drivers: 2 isobaric DD for bass (especially the sub-bass), and 2 BA for full-range and treble. Since it has 3-way passive crossover system, I suspect one of the BA is for full-range and another is for treble.
The shell design of the KE4 is a contoured resin with a glossy plate that bearing the Kiwi logo. The design results with a very comfortable fit and a good seal. Even though the package comes with only one type of tips with almost the same size, it fits very well without too much need of tips rolling.
With the package, the stock cable is a standard two-pin with a single-ended 3.5mm termination. The cable itself is good quality at this price range and it is very light and flexible to wear. For those who have a good 4.4mm cable, I strongly suggest you to try some cable rolling, IMO the KE4 is actually limited by its stock cable. I will talk about my cable rolling experience in the end of my sound impressions.
The packaging of the KE4 is very minimal but comes with a very nice hard-shell carry case, which is not common at this price range.
The Sound Impressions
Now let's talk about the most important part of the review: how does the KE4 sound like? If I have to use one word to describe KE4, it will be "easy-listening". Personally I think Kiwi Ears made a good decision regarding the sound signature of the KE4 as an entry-level all-rounder. For the price of the KE4, you can bring it on the go and you will be able to enjoy the music while doing your things.
I have been listening to the KE4 with DAPs, such as Sony NW-WM1Z, NW-WM1AM2, and R2R Hiby RS2. I also listened the streaming music from my laptop from Cayin RU6 dongle, and from my desktop setup with both solid state amp and tube amp, the KE4 clearly scales well with the source.
Something I need to point out is that the KE4 actually needs some juice to drive, I found out that I need to turn most of my source up, even more than the relatively hard to drive Sony IER-Z1R.
The first time you put the KE4 in your ears, you can immediately notice the sub-bass rumbling and the overall bass performance is something unexpected for this price range. It is definitely not a bass-head IEM, nor it intends that way. However, the quality of the bass is unexpectedly good in texture. However, the quantity of the bass is lower than what I expected when I learned that there are two DD in the KE4. The choice of the bass tone is also leaning towards sub-bass. You have all the rumbling, the thudding, and the pounding, but the bass is never the main role, it is played in the background. Since I am a confessed bass-head, personally I like more bass quantity, and especially more mid-bass. PS: after a cable rolling with Code 24, the KE4 has a complete change-over in its bass performance.
The strength of the KE4 is in its Mids. With singer/song writer genre and general pop music, you will have the vocal always in the center of the stage and in the spot light. The vocal is lush and sweet and clear. If your music library consisted of mostly of those genres, you will be in for a treat. It is very easy for you to wear the KE4 for an entire day listening to pop music and songs without too much distraction from the music.
The overall sound signature of the KE4 is a balanced warm U shape with the treble a little bit de-emphasized. Not that the treble is rolled off, or not extended enough, it is just not there with too much energy. For people who are sensitive to treble sibilance, the KE4 is a good news since you will never experience any. However, the treble in the KE4 is so well controlled it will give you the impression that the resolution of the KE4 is not high. In the beginning, I had the feeling that I could hear less details compared to my other high-end IEMs, but I found that if I paid enough attention, I actually could hear them. The details are still there, they are just not in your face and you tend to ignore them when you are listening to the vocal.
Regarding the sound stage and instrument separation, the KE4 performs pretty well at this price range, it will sound like an audiophile grade IEM. If you are an average Joe who used to wear TWS or some cheap earpieces, pick up a KE4 and listen to music with dongles, you will be surprised to how good it sounds.
Comparisons
As I don't have much experience at the entry-level IEMs, I will briefly compare the KE4 to some entry-level IEMs I currently own though all of them are significantly more expensive than the KE4.
Penon Audio Quattro is a 4 DD driver configured IEM priced at $399, which is twice as more expensive as KE4. The sound signature is actually quite similar with warm and lush Mids. The Quattro has a much lifted bass shelf with more bass quantity. It is another IEM that you can listen with all day long without fatiguing. In some sense, the Penon Quattro is a KE4 on steroid, but at half the price, you can have the KE4 for a similar experience.
Elysian Acoustic Labs Pilgrim is another IEM priced at $399 with 1 DD and 3BA. Though Pilgrim is never a baby Annihilator, it still shine with its treble performance. Pilgrim is a totally differently tuned IEM with a V shape sound signature. It is tuned with more fun factor, but it also requires more attention from you and it is not as easy going as the KE4.
The single BA Etymotic ER4XR is currently priced at $299, but it was priced much higher and used to be one of the benchmark IEM. With so many years passing by, you can see how the audiophile world evolved. Compared to ER4XR, which is a Mid-centric IEM, the KE4 is more enjoyable and of course, without having to deep insert and violating your ears.
Overall Conclusion (Cable Rolling)
Kiwi Ears KE4 is a really good all-rounder for those who either want to test the water of audiophile world without breaking your bank, or someone who want a set that you can bring out with you on the go without worrying about being lost or stolen in your trip. It will also be a good choice if you want to use your own IEM on an airplane, the 3.5mm stock cable is very handy for most the airlines. I remember that I was having trouble during many of my flights since all of my other IEMs terminated with 4.4mm and I cannot use them on the airplane. I would say that the KE4 is a very competitive offer at sub $300 range. Unless you are looking for a specialty IEM, such as a bass-head IEM or treble-head IEM, you will be very satisfied with the KE4 as a cheap all-rounder.
I did some comic style cable rolling: I switched the stock cable with an Effect Audio code 24. Yes, I am using a $799 cable on a $199 IEM. However, the result of the cable rolling is draw-dropping: the sound stage opens up a lot, and most importantly the bass is significantly improved with both quantity and impact. What I complained about having too few bass is not longer the case for this combo.
Some Sound-Tracks Used
It is one of the classic track to test bass and sub-bass:
Big Boi - Kill Jill ft. Killer Mike, Jeezy
Another very popular track for headphone testing:
Dire Straits - Sultans Of Swing (Alchemy Live)
Even though the KE4 is probably tuned for Western customers, it will be interesting to listen to some Eastern music:
莫文蔚 Karen Mok《這世界那麼多人 Empty World》Official MV
This is one of my favorite tracks to test headphones for vocal performance:
Norah Jones - Don't Know Why
You really need to get a better cable before listening to this track, the KE4 is a even much better all-rounder for hip hop.
Kendrick Lamar - HUMBLE
Last edited:
Vamp898
4.4mm Outputs usually have double the output impedance of the 3.5mm
Example: 3.5mm 0.6Ω, 4.4mm 1.2Ω
Some DAPs even go beyond 2Ω when using 4.4mm. As the cable impedance is added to the output impedance, you can easily top out at 3Ω which does negatively influence the sound quality.
Lower output impedance will result in better sound quality, so usually with IEM you want to use 3.5mm so i would not say shipping 3.5mm per se is a negative point, given the cable is good.
Even High End IEM like the MH334 Studio Reference or the Vision Ears VE7 (Both around 2000$) only come with 3.5mm for exactly that reason, highest possible sound quality. So i personally think its a bit unfair to credit an negative point for an 3.5mm cable.
Example: 3.5mm 0.6Ω, 4.4mm 1.2Ω
Some DAPs even go beyond 2Ω when using 4.4mm. As the cable impedance is added to the output impedance, you can easily top out at 3Ω which does negatively influence the sound quality.
Lower output impedance will result in better sound quality, so usually with IEM you want to use 3.5mm so i would not say shipping 3.5mm per se is a negative point, given the cable is good.
Even High End IEM like the MH334 Studio Reference or the Vision Ears VE7 (Both around 2000$) only come with 3.5mm for exactly that reason, highest possible sound quality. So i personally think its a bit unfair to credit an negative point for an 3.5mm cable.
