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.
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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.
