-
Moondrop x Honkai: Star Rail RobinFeatures - 10mm Tin ceramic dome diaphragm dynamic driver + 6mm annular planar treble driver -... -
Creative Aurvana Ace MimiBT5.3 ANC TWS with xMEMS & DD driver arrangement, Mimi Sound Personalization, Bluetooth® LE... -
Moondrop Edge Bluetooth 5.4 Wireless ANC HeadphonesMoondrop Edge Full-Scene Immersive Series Hi-Fi Portable Wireless ANC Headphone Foldable Lightweight
-
Geekfly GF3 True WirelessThe Geekfly GF3 is a triple driver hybrid iem from Geekfly Audio featuring a 10 mm dynamic... -
BASEUS BOWIE E19, HAYLOU X1S, LENOVO XT88COMPARATIVE BETWEEN BASEUS BOWIE E19, HAYLOU X1S, LENOVO XT88
-
Edifier STAX Spirit S5The latest wireless headphone from Edifier, the Spirit S5 -
EAR Micro T10 Bespoke - Featuring Klipsch AudioA cooperative effort from Ear Micro, including Klipsch and Bragi OS, the T10 is an ear computer...
-
Sivga LuanThe Luan is Sivga's latest offering in an open-back headphone at the affordable price of $299
-
Unique Melody U-FreeUM's first go at a TWS ear bud.
-
Bowers & Wilkins Px8An upgrade from the Px7 V2, the Px8 moves into the top tier of wireless headphones.
Latest reviews
Introduction
When I think of Edifier, I think of them as a more budget-oriented brand, having come across a lot of their cheap earbuds on multiple e-commerce platforms in the past. Like, one of those Chinese brands that managed to penetrate the market solely by selling volumes of cheap stuff. Something along the lines of UGREEN or Anker.
So, imagine my surprise when I first chanced upon the STAX Spirit S3 at a relatively eye-watering price of 400 bucks a few years ago. Granted, at the time, they had one of the only few Bluetooth/wireless planar headphones around (and currently still do). Still, it seemed perplexing to me for the price; a relatively unknown brand in the consumer space with a driver type most people won’t even know or care about, trying to be price competitive with the likes of Sony, Bose, and even Sennheiser. And here’s the kicker – it doesn’t even have ANC. For me, it’s a tough pill to swallow even for the novelty. Thus, I passed it without a second thought.
Fast forward to today, and Edifier had just released the “first” ever TWS planar earbuds, the STAX Spirit S10. I say “first”, because technically Moondrop’s Golden Ages beat them to it by a couple of months (comparisons later). I’m guessing it’s either an oversight in their marketing, or Edifier had been developing their earbuds for quite some time now. Anyway, being cheaper and more functional than the STAX Spirit S3 headphones, I finally pulled the trigger. And so here we are.
For evaluation, I used a Samsung Galaxy S23 Ultra as my source with the usual slew of lossy and lossless music via the LDAC codec at the 44.1kHz sample rate/bitrate setting. The default, or “Original” preset was used alongside the highest noise cancelling setting. Firmware used during testing is 1.0.7.
Unboxing, Build Quality, and Comfort
The entire package is hefty and large, especially compared to what my Samsung Buds3 Pro were packed in. Sliding off its cover sleeve reveals a textured cardboard box which feels appropriately high quality, complimenting the unboxing experience nicely.
Inside reveals an envelope containing the usual paperwork, eartips, and the earbuds themselves. Edifier provides a good range of tips, which is nice and should be standard for a product at this price (cough Samsung cough). Underneath that is another box with the rest of the accessories, a polyester pouch and charging cable.
The matte black case feels smooth and is luckily not a fingerprint magnet. Its horizontal profile compared to the vertical case of the Airpods’ means that opening it with one hand is cumbersome. In terms of size and weight, it’s more or less in line with your typical TWS earbuds, being perfectly pocketable without any sharp edges jutting out awkwardly.
The earbuds themselves are lightweight with a flat, relatively bulky stem jutting out on the sides. Despite that, its weight is not lopsided such that it will just fall off with a little bit of movement.
Fit is great, and much more snug than my Samsung Buds3 Pro due to its more contoured head relative to the Buds3 Pro’s flatness. One downside, however, is that it’s easy for them to slip off if my ears are wet or get waxy over time. With its wide range of tips, nearly everyone should be able to find the best secure fit for their ears. Personally, I shifted from the default M size to L for a better seal, which is paramount in preserving what little bass is being produced by the earbuds. More on the bass later.
Usability and Features
To access to all its features, the EDIFIER Connex app needs to be used in conjunction with the earbuds. A login prompt will pop up every time for unregistered users whenever they start the app, which is kind of annoying especially since you don’t need an account to have access to all its features. But I digress. I’ll list down my thoughts on some of its major features in the app below.
ANC – There are three strength settings for its ANC; wind reduction, medium, and high. There is an adaptive noise cancelling mode, but in my experience, it hardly even varies and pretty much stuck to high all the time. Wind reduction is extremely mild and sounds close to its ANC switched off. Medium and high are so similar in ANC strength to the point that there’s no meaningful difference between the two. With the way that these presets are presented, one might as well either have ANC switched off or at the highest setting.
In any case, the STAX Spirit S10’s ANC won’t be winning any awards. There’s a noticeable hiss at the medium and highest settings and doesn’t cancel as much engine or ambient noise as my Samsung Buds3 Pro, which costs less. It’ll do its job of drowning out noise especially when you play your music, but nothing more.
Similarly, its ambient mode also has three settings; background sound, balanced, and voice enhancement. Unfortunately, all three fell short of my expectations at this price point. The only setting worth choosing is its voice enhancement setting, which is the strongest and clearest for voices of the three if you want to talk to someone without taking the earbuds off.
However, regardless of the presets, voices don’t sound natural but rather slightly muted, nor do the ambient noises around me sound convincing enough to blend in seamlessly when I’m listening to music over it.
Another thing of note is its relatively low maximum volume. On public transportation, I frequently had to increase its volume to about 60% - 70% with ANC set to its highest setting for a comfortable listening volume. I can easily see those with less sensitive hearing max out the volume, so I’d recommend thinking twice if you listen to your music at louder volumes (not that you necessarily should).
Hardware Controls – The earbuds use pinching gestures at the tip of their stems to control music, which can be customized through the app. Press for play/pause, long press to cycle ANC modes, etc. There’s about half a second of input delay, but that’s nothing too egregious in the realm of TWS earbuds. You can even adjust the press sensitivity to prevent accidental controls or for lighter presses.
Game Mode – Claims to decrease latency during gaming. I didn’t encounter any latency issues during normal use anyway, so switching game mode on made no perceived difference in my listening experience for me.
Audio Codecs – Since these earbuds support lossless codecs (i.e. LDAC/LHDC), its app allows switching between multiple sampling rates of 96kHz, 44.1kHz/48kHz, or to disable them altogether. The sweet spot for my Samsung Galaxy S23 Ultra seems to be 44.1kHz/48kHz, since using 96kHz will introduce frequent audio cutouts especially during transport or busy areas for very little perceived benefit. Your mileage may vary based on the device you’re paired with and surrounding environment.
In-app Equalizer
The in-app EQ is great, aside from a few quirks. It’s great that Edifier chose to implement a parametric EQ for its app, which allows users a high degree of fine tuning to get to their preferred sound. And here’s the big but – it’s only limited to four bands. Yes, four.
While you can choose which frequency to manipulate, you can only do so within these four frequency ranges: 20Hz- 200Hz for bass, 201Hz – 3000Hz for mids, 3001Hz – 5000Hz for upper mids, and 5001Hz – 10000Hz for treble. What does this mean? It means you can’t edit multiple frequencies in the same band e.g., edit 3500Hz and 4500Hz at the same time, OR touch frequencies past 10000Hz.
Another mind-boggling thing – each band is limited to only ±3db of adjustment. To put that into perspective, that’s equivalent to one or two volume steps of difference on a typical smartphone. All in all, a weird package for an EQ targeted to audiophiles.
Original – The default preset, and yet not the best option on my current firmware.
Dynamic – A V-shaped tuning preset that slightly elevates the bass and makes the treble even brighter. The bass boost is welcome, but the treble becomes too sibilant and hissy for me.
Electrostatic – Bass and mids are reduced, creating an even leaner tuning. I think Edifier’s trying to make a more analytical tuning, but when it comes at the expense of detail in the mids, it just doesn’t work.
Customized – This is where it gets weird. In the app, Edifier describes the “customized” EQ as the customizable version of the “Original” preset, but there’re some differences in the treble here. It’s much more tame and less metallic. From what little information I could find online, I’m suspecting that this is a software bug, and that this preset is the true “Original” preset. Most recommended preset, and ironically you don’t have to do any further customization.
Sound Quality
The STAX Spirit S10’s sound signature could be described as neutral-bright, which is a tuning you don’t often see in the TWS market irrespective of price bracket.
To start, its bass sounds flat yet deep, showcasing that “linear planar bass” as and when the track calls for it. However, bass quantity lacks in this department, which somewhat does betray its potential. A proper seal is paramount to get the ideal bass response, since without one you’ll find it exceptionally lacking. Though there’s still a bit of punch in the mid-bass, I always find myself wanting to reach out for my EQ app to add on to the bass shelf. Those who prefer neutral or light bass may find it just enough, however.
Mids generally sound lean and deemphasized. Guitars, drums, and even some vocals are pushed back into the mix to make way for the airy treble. I find that in most of my metal tracks, electric guitars aren’t as prominent or impactful compared to more neutrally tuned sets like the Etymotic ER3SE. In busy tracks, male vocals tend to get drowned into the background with other instruments, giving them a laid-back impression. Female vocals on the other hand, sound bright and more pronounced due to the emphasized upper mids and treble.
And the treble is where the S10s shine; both literally and figuratively, though at a polarizing cost. While female voices sound sparkly, engaging, and clear, it comes at the expense of naturality. Peaks in the treble causes extra-tizzy sibilance and an overly processed presentation. The crash of cymbals has extra shimmer, and hi-hats have some sort of bit-crushed sound or a chiptune quality to it. All this contributes to a metallic timbre in the treble that is particularly bothersome to me, especially at this price point.
Switching to the “Customized” preset would tame this quirk significantly, but not quite eliminate it. And speaking of EQ, it’s not something that could be completely fixed with that either. The metallic timbre peaks for me at around 8kHz and 12kHz respectively, but filtering that out would result in the harmonics of other instruments being muted too.
Technicalities
Overall resolution is average and expected of this price point. Any less would be disappointing. The planar driver’s speed is quintessential in revealing the finer details of any music track, especially in the treble region. It can render bass notes and drum strikes in rapid succession as needed but lacks the dynamics and impact of a conventional dynamic driver.
Soundstage is about average in width for a set of TWS earbuds, extending to the tips of my ears. There’s not much depth or height, but then again, that’s also like 90% of earbuds anyway.
The imaging comes off as diffused rather than precise, with instrument separation suffering as a result. They all sound like they’re coming from one glob and not spread across the soundstage.
Comparison
I was curious to see how the STAX Spirit S10 stack up against the only other TWS planar earbuds, the Moondrop Golden Ages (shortened thereon to GA), so I went over to SAM Audio to demo them for about an hour. Do note that due to the amount of listening time I had, these are mostly just quick sound impressions. Still, I’m fairly confident in my own assessments in pointing out the main differences between the two earbuds.
Build Quality – The Golden Ages are lighter and feels a little cheaper, but reasonable at its much lower price point.
Usability – ANC is a mixed bag for the GA. It blocks slightly less overall noise than the S10s, but better at attenuating high frequency sounds, which I prefer to the persistent hissing of the S10s. Transparency mode on the GA is also more natural and transparent possibly due to better mics. GA wins here.
Sound Quality – The GA is more natural/neutral sounding without any strange timbral issues. It has less peaky treble and smoother upper harmonics. Vocals are comparatively more present/forward, while bass exhibits deeper rumble, but not as much mid-bass punch as the S10s. Overall a warmer tuned set.
Technicalities – The Stax has better detail retrieval in the treble, while the GA’s forte is in the mids. Apart from that, resolution is also quite similar. Soundstage is on par with both, but perhaps smaller on the GA. Imaging is more precise for the GA, while the S10s are more diffused.
Based off these comparisons, the Moondrop Golden Ages to me is the much more compelling buy due to its subjectively better tonality and on-par technicalities with the Stax Spirit S10s.
Conclusion
These earbuds are a tough one to score. I’ve been teetering back and forth on a recommendation. On one hand, there’s really not much to criticize in its tuning nor technicalities, but on the other, the timbral issues in its treble rears its head once in a while to interrupt what would otherwise be a pleasant music listening session. I’d be fine listening to once song, but in the next, a female singer’s vocals would sound too artificial and processed, or cymbals just being off and unnatural. Like a small rock in my shoe that’s small enough to ignore the rest of the day, but big enough to be an annoyance.
At its MSRP of USD$299, it’s literally the only pick on the market if you’re looking for a planar TWS with a treble-focused sound signature and lean bass/mids. Otherwise, I’d rather recommend the Moondrop Golden Ages instead, which costs a mere USD$79 and has a much more pleasant tuning while trading blows with the S10s on the technical front.
Suffice to say, the STAX Spirit S10s are a hard sell at their asking price. They’re not bad per se, they’re just not good value.
When I think of Edifier, I think of them as a more budget-oriented brand, having come across a lot of their cheap earbuds on multiple e-commerce platforms in the past. Like, one of those Chinese brands that managed to penetrate the market solely by selling volumes of cheap stuff. Something along the lines of UGREEN or Anker.
So, imagine my surprise when I first chanced upon the STAX Spirit S3 at a relatively eye-watering price of 400 bucks a few years ago. Granted, at the time, they had one of the only few Bluetooth/wireless planar headphones around (and currently still do). Still, it seemed perplexing to me for the price; a relatively unknown brand in the consumer space with a driver type most people won’t even know or care about, trying to be price competitive with the likes of Sony, Bose, and even Sennheiser. And here’s the kicker – it doesn’t even have ANC. For me, it’s a tough pill to swallow even for the novelty. Thus, I passed it without a second thought.
Fast forward to today, and Edifier had just released the “first” ever TWS planar earbuds, the STAX Spirit S10. I say “first”, because technically Moondrop’s Golden Ages beat them to it by a couple of months (comparisons later). I’m guessing it’s either an oversight in their marketing, or Edifier had been developing their earbuds for quite some time now. Anyway, being cheaper and more functional than the STAX Spirit S3 headphones, I finally pulled the trigger. And so here we are.
For evaluation, I used a Samsung Galaxy S23 Ultra as my source with the usual slew of lossy and lossless music via the LDAC codec at the 44.1kHz sample rate/bitrate setting. The default, or “Original” preset was used alongside the highest noise cancelling setting. Firmware used during testing is 1.0.7.
Unboxing, Build Quality, and Comfort
The entire package is hefty and large, especially compared to what my Samsung Buds3 Pro were packed in. Sliding off its cover sleeve reveals a textured cardboard box which feels appropriately high quality, complimenting the unboxing experience nicely.
Inside reveals an envelope containing the usual paperwork, eartips, and the earbuds themselves. Edifier provides a good range of tips, which is nice and should be standard for a product at this price (cough Samsung cough). Underneath that is another box with the rest of the accessories, a polyester pouch and charging cable.
The matte black case feels smooth and is luckily not a fingerprint magnet. Its horizontal profile compared to the vertical case of the Airpods’ means that opening it with one hand is cumbersome. In terms of size and weight, it’s more or less in line with your typical TWS earbuds, being perfectly pocketable without any sharp edges jutting out awkwardly.
The earbuds themselves are lightweight with a flat, relatively bulky stem jutting out on the sides. Despite that, its weight is not lopsided such that it will just fall off with a little bit of movement.
Fit is great, and much more snug than my Samsung Buds3 Pro due to its more contoured head relative to the Buds3 Pro’s flatness. One downside, however, is that it’s easy for them to slip off if my ears are wet or get waxy over time. With its wide range of tips, nearly everyone should be able to find the best secure fit for their ears. Personally, I shifted from the default M size to L for a better seal, which is paramount in preserving what little bass is being produced by the earbuds. More on the bass later.
Usability and Features
To access to all its features, the EDIFIER Connex app needs to be used in conjunction with the earbuds. A login prompt will pop up every time for unregistered users whenever they start the app, which is kind of annoying especially since you don’t need an account to have access to all its features. But I digress. I’ll list down my thoughts on some of its major features in the app below.
ANC – There are three strength settings for its ANC; wind reduction, medium, and high. There is an adaptive noise cancelling mode, but in my experience, it hardly even varies and pretty much stuck to high all the time. Wind reduction is extremely mild and sounds close to its ANC switched off. Medium and high are so similar in ANC strength to the point that there’s no meaningful difference between the two. With the way that these presets are presented, one might as well either have ANC switched off or at the highest setting.
In any case, the STAX Spirit S10’s ANC won’t be winning any awards. There’s a noticeable hiss at the medium and highest settings and doesn’t cancel as much engine or ambient noise as my Samsung Buds3 Pro, which costs less. It’ll do its job of drowning out noise especially when you play your music, but nothing more.
Similarly, its ambient mode also has three settings; background sound, balanced, and voice enhancement. Unfortunately, all three fell short of my expectations at this price point. The only setting worth choosing is its voice enhancement setting, which is the strongest and clearest for voices of the three if you want to talk to someone without taking the earbuds off.
However, regardless of the presets, voices don’t sound natural but rather slightly muted, nor do the ambient noises around me sound convincing enough to blend in seamlessly when I’m listening to music over it.
Another thing of note is its relatively low maximum volume. On public transportation, I frequently had to increase its volume to about 60% - 70% with ANC set to its highest setting for a comfortable listening volume. I can easily see those with less sensitive hearing max out the volume, so I’d recommend thinking twice if you listen to your music at louder volumes (not that you necessarily should).
Hardware Controls – The earbuds use pinching gestures at the tip of their stems to control music, which can be customized through the app. Press for play/pause, long press to cycle ANC modes, etc. There’s about half a second of input delay, but that’s nothing too egregious in the realm of TWS earbuds. You can even adjust the press sensitivity to prevent accidental controls or for lighter presses.
Game Mode – Claims to decrease latency during gaming. I didn’t encounter any latency issues during normal use anyway, so switching game mode on made no perceived difference in my listening experience for me.
Audio Codecs – Since these earbuds support lossless codecs (i.e. LDAC/LHDC), its app allows switching between multiple sampling rates of 96kHz, 44.1kHz/48kHz, or to disable them altogether. The sweet spot for my Samsung Galaxy S23 Ultra seems to be 44.1kHz/48kHz, since using 96kHz will introduce frequent audio cutouts especially during transport or busy areas for very little perceived benefit. Your mileage may vary based on the device you’re paired with and surrounding environment.
In-app Equalizer
The in-app EQ is great, aside from a few quirks. It’s great that Edifier chose to implement a parametric EQ for its app, which allows users a high degree of fine tuning to get to their preferred sound. And here’s the big but – it’s only limited to four bands. Yes, four.
While you can choose which frequency to manipulate, you can only do so within these four frequency ranges: 20Hz- 200Hz for bass, 201Hz – 3000Hz for mids, 3001Hz – 5000Hz for upper mids, and 5001Hz – 10000Hz for treble. What does this mean? It means you can’t edit multiple frequencies in the same band e.g., edit 3500Hz and 4500Hz at the same time, OR touch frequencies past 10000Hz.
Another mind-boggling thing – each band is limited to only ±3db of adjustment. To put that into perspective, that’s equivalent to one or two volume steps of difference on a typical smartphone. All in all, a weird package for an EQ targeted to audiophiles.
Original – The default preset, and yet not the best option on my current firmware.
Dynamic – A V-shaped tuning preset that slightly elevates the bass and makes the treble even brighter. The bass boost is welcome, but the treble becomes too sibilant and hissy for me.
Electrostatic – Bass and mids are reduced, creating an even leaner tuning. I think Edifier’s trying to make a more analytical tuning, but when it comes at the expense of detail in the mids, it just doesn’t work.
Customized – This is where it gets weird. In the app, Edifier describes the “customized” EQ as the customizable version of the “Original” preset, but there’re some differences in the treble here. It’s much more tame and less metallic. From what little information I could find online, I’m suspecting that this is a software bug, and that this preset is the true “Original” preset. Most recommended preset, and ironically you don’t have to do any further customization.
Sound Quality
The STAX Spirit S10’s sound signature could be described as neutral-bright, which is a tuning you don’t often see in the TWS market irrespective of price bracket.
To start, its bass sounds flat yet deep, showcasing that “linear planar bass” as and when the track calls for it. However, bass quantity lacks in this department, which somewhat does betray its potential. A proper seal is paramount to get the ideal bass response, since without one you’ll find it exceptionally lacking. Though there’s still a bit of punch in the mid-bass, I always find myself wanting to reach out for my EQ app to add on to the bass shelf. Those who prefer neutral or light bass may find it just enough, however.
Mids generally sound lean and deemphasized. Guitars, drums, and even some vocals are pushed back into the mix to make way for the airy treble. I find that in most of my metal tracks, electric guitars aren’t as prominent or impactful compared to more neutrally tuned sets like the Etymotic ER3SE. In busy tracks, male vocals tend to get drowned into the background with other instruments, giving them a laid-back impression. Female vocals on the other hand, sound bright and more pronounced due to the emphasized upper mids and treble.
And the treble is where the S10s shine; both literally and figuratively, though at a polarizing cost. While female voices sound sparkly, engaging, and clear, it comes at the expense of naturality. Peaks in the treble causes extra-tizzy sibilance and an overly processed presentation. The crash of cymbals has extra shimmer, and hi-hats have some sort of bit-crushed sound or a chiptune quality to it. All this contributes to a metallic timbre in the treble that is particularly bothersome to me, especially at this price point.
Switching to the “Customized” preset would tame this quirk significantly, but not quite eliminate it. And speaking of EQ, it’s not something that could be completely fixed with that either. The metallic timbre peaks for me at around 8kHz and 12kHz respectively, but filtering that out would result in the harmonics of other instruments being muted too.
Technicalities
Overall resolution is average and expected of this price point. Any less would be disappointing. The planar driver’s speed is quintessential in revealing the finer details of any music track, especially in the treble region. It can render bass notes and drum strikes in rapid succession as needed but lacks the dynamics and impact of a conventional dynamic driver.
Soundstage is about average in width for a set of TWS earbuds, extending to the tips of my ears. There’s not much depth or height, but then again, that’s also like 90% of earbuds anyway.
The imaging comes off as diffused rather than precise, with instrument separation suffering as a result. They all sound like they’re coming from one glob and not spread across the soundstage.
Comparison
I was curious to see how the STAX Spirit S10 stack up against the only other TWS planar earbuds, the Moondrop Golden Ages (shortened thereon to GA), so I went over to SAM Audio to demo them for about an hour. Do note that due to the amount of listening time I had, these are mostly just quick sound impressions. Still, I’m fairly confident in my own assessments in pointing out the main differences between the two earbuds.
Build Quality – The Golden Ages are lighter and feels a little cheaper, but reasonable at its much lower price point.
Usability – ANC is a mixed bag for the GA. It blocks slightly less overall noise than the S10s, but better at attenuating high frequency sounds, which I prefer to the persistent hissing of the S10s. Transparency mode on the GA is also more natural and transparent possibly due to better mics. GA wins here.
Sound Quality – The GA is more natural/neutral sounding without any strange timbral issues. It has less peaky treble and smoother upper harmonics. Vocals are comparatively more present/forward, while bass exhibits deeper rumble, but not as much mid-bass punch as the S10s. Overall a warmer tuned set.
Technicalities – The Stax has better detail retrieval in the treble, while the GA’s forte is in the mids. Apart from that, resolution is also quite similar. Soundstage is on par with both, but perhaps smaller on the GA. Imaging is more precise for the GA, while the S10s are more diffused.
Based off these comparisons, the Moondrop Golden Ages to me is the much more compelling buy due to its subjectively better tonality and on-par technicalities with the Stax Spirit S10s.
Conclusion
These earbuds are a tough one to score. I’ve been teetering back and forth on a recommendation. On one hand, there’s really not much to criticize in its tuning nor technicalities, but on the other, the timbral issues in its treble rears its head once in a while to interrupt what would otherwise be a pleasant music listening session. I’d be fine listening to once song, but in the next, a female singer’s vocals would sound too artificial and processed, or cymbals just being off and unnatural. Like a small rock in my shoe that’s small enough to ignore the rest of the day, but big enough to be an annoyance.
At its MSRP of USD$299, it’s literally the only pick on the market if you’re looking for a planar TWS with a treble-focused sound signature and lean bass/mids. Otherwise, I’d rather recommend the Moondrop Golden Ages instead, which costs a mere USD$79 and has a much more pleasant tuning while trading blows with the S10s on the technical front.
Suffice to say, the STAX Spirit S10s are a hard sell at their asking price. They’re not bad per se, they’re just not good value.
Edifier Stax S10 ($299): A TWS to compete with the best? You bet.
Stax S10
Intro:
Recently, having come off the Edifier Stax Spirit S5 review, I was eager to try the new TWS earbud from the company. The Spirit S5 took the good parts of the S3, making them better while enhancing the sound, too. I came away very impressed with the new model. So, when offered the S10 for review, I wholeheartedly agreed. I knew nothing about it and thought this would be a good opportunity to try a TWS earbud from Edifier after several wireless headphone models.
The S10 is mine to keep, but may be asked back for any reason. This will not play into my review, nor should it. Plus, this unit will not be flipped. That is still majorly uncool.
The unit was checked for functionality and then played on various devices for 75 hours before critical listening happened. I have always believed that the user is interested in how the unit sounds “down the road,” and not just in a new condition.
Specs:
12mm modular planar magnetic driver
Qualcomm QCC5181 Bluetooth SoC BT 5.4
Bluetooth Protocol: A2DP, AVRCP, HFP
Charging Port: USB-C (Type-C) Input: 5V⎓ 200 mA (Earphones), 5V⎓ 1A (Charging Case)
Charging Time: About 1.5 hours
Frequency Response: 20Hz - 40kHz
IP Rating: IP54
Playtime: ANC ON: 18 hours, ANC OFF: 28 hours (15 min for 2hrs playtime)
Audio Codecs: LHDC 5.0, LDAC, aptX™ Lossless, aptX™ Adaptive, aptX™ Voice, Snapdragon Sound™, AAC, SBC
Sound Pressure Level: 92 ± 3 dB(A)
Net Weight: Approx. 56g
In The Box:
Edifier Stax S10
Case
USB-C charging cable
Ear tips in 5 sizes
Owner's manual
Quick start guide
Gear Used/Compared:
UM U-Free TWS ($349)
AK UW100MKII TWS ($299)
Bowers & Wilkins Pi7 S2 ($399)
iPhone 13 Pro Max
HiBy R4
MBP
Unboxing:
The unboxing experience of Edifier products has always been top class, and the S10 is no different. From a hard cover slide-off sleeve to the same material of the inner box, it is solid and upscale.
Removing the top lid, you are first presented with an "envelope" that contains the manual and quick start guide. Underneath, you are presented with the case, and the buds inside. Below are pegs, which hold the various sized (and color coordinated) ear tips.
Lifting the plastic formed cutout, you have a box, which contains the charging cable (on the short side), and a nice carrying pouch for keeping the case and cable in together. A thoughtful inclusion.
Nothing frilly, nothing missing. That to me typifies Edifier in their presentation.
Design:
The S10 carries the shape of older BT devices before they were turned into earbuds. I was not a fan of the shape until I put this particular set in my ear. Knowing the fit is one direction, the fit is very good.
Smooth, glossy, black plastic abound on the earbuds, and they do draw fingerprints, unfortunately. The “face plate” does carry a sparkly black tint to it, which is subdued and classy to me. There is also a microphone hole on that face plate.
The bulbous chamber backs the shorter nozzles, making for that good fit of which I spoke. The long flange does not carry any controls on the faceplate, which hopefully can be fixed in the next iteration. To me, that surface is begging for slide volume controls much like the current crop of wireless headphones have.
The actual control center lies on the flange’s top side. A press of the control area activates the necessary functions. This to me could be better thought out, with the incorporation of that fabulous face plate in my opinion.
Handling the TWS units was easy, too, with good tactility due to the sharper shape of the flanges. Upon removal, the sound does stop, which is pretty typical and much appreciated.
The shape also carries three microphones per side, with one just above the nozzle, one on the front of the flange (closer to your mouth), and one on the faceplate.
Tech Highlights:
The 12mm planar driver is purported to be the first of its kind with ANC. Its ultra-thin diaphragm 2μm polymer substrate is engineered for fast and accurate transient responses, which planars are known for. The push/pull magnet ensures equal forces across all movements, further stabilizing sound reproduction.
Using the company’s patented 2nd generation EqualMass™ wiring technology for steady piston-motion planar driver performance also aids in the speed of sound reproduction. This symmetric supporting wire stabilizes the diaphragm for a more uniform response.
With a total thickness of 10μm, the S10 driver system presents itself as highly musical.
Each pair is calibrated together to ensure musical accuracy across both sides, something they also do on the S5 headphones.
Wireless Connectivity:
Qualcomm’s QCC5181 chipset drives BT5.4, allowing for CODEC support of LHDC 5.0, LDAC, aptX™ Lossless, aptX™ Adaptive, aptX™ Voice, Snapdragon Sound™, AAC, and SBC. Snapdragon sound can only be used currently with devices that support such technology. I did not have anything of the sort in-house.
With the ability to multi-connect, you can play music on your laptop or DAP and then answer a call on your Smartphone. Returning to music is automatically taken care of once the call ends.
Qualcomm’s 3rd generation adaptive ANC comes with the S10 and can be toggled on or off within the ConneX app. I used the adaptive ANC for the majority of the testing period.
Battery Life:
When using ANC, battery life (with case) is limited to 18 hours. Using ANC off allows up to 28 hours of usage with the case. A 15-minute charge in the case will yield 2 hours of listening.
I do wish that TWS earbud battery technology would catch up to some of the monstrous levels afforded on wireless headphones. Hopefully, that day is coming.
App:
At first glance, the app seems quite rudimentary. Delving further into the settings, you are presented with a whole host of features and functions. Knowing this, I immediately entered the “Control settings” and set “volume up” for a double pinch on the left earbud and “volume down” on the right. I rarely use the FF or REW functions on wireless items, so this made sense to me.
You can also set press sensitivity and such things as “find my product” in the menus. Moving back to the main screen, you can access the noise cancellation controls as well as “Sound effects” (EQ), and game mode to keep latency low (89ms).
A custom EQ allows for four frequency bands to be adjusted, just like the S5 (which makes sense; it’s the same app), along with the level of Q-factor, which increases or decreases the center of the frequency involved. This can be used to make the notes “fatter” or “thinner” allowing an adjustment to attack and decay. I did play around with it on the S5 and found it useful. The involved frequencies can also be customized to better acclimate for your tastes by long pressing on the number at the bottom.
You can share your EQ settings via the “More” button at the top of the EQ screen.
Activating the EQ settings does cause the music to pause while the setting is adjusting. A minor annoyance to me.
Sound Impressions:
The following sound impressions were made using the S10 tethered to the iPhone 13 Pro Max, MBP, and HiBy R4. Comparisons are noted below. Impressions are listed here using no EQ other than the “dynamic” setting on the iPhone and R4. The MBP running Tidal was left to the hands of whatever Tidal threw its way.
Summary:
The Edifier Stax S10 comes across with a near-neutral sound with a punchy albeit not deep-reaching bass. Using the ConneX app, you can tailor the sound to your delight. The familiar planar sound in the upper mids takes to the forefront, presenting succinct “S” sounds without too much tizziness or sibilance. Mids sit slightly above the middle but could be mistaken for dead-center on many recordings. As such, it pulls the ends together, melding the sound signature into a cohesive mass of sound.
Tight bass lines almost hide the lack of true sub-bass reach, but if you listen you can quickly discern the true depth isn’t there like a dynamic driver. That said, when called upon, such as with hard-hitting bass drums, the presence you feel replicates the missing deep reach.
Timbre:
The S10 comes across as one of the lesser-colored TWS earbuds I have heard of late. While many espouse deep-reaching bass or artificially accented top end, the S10 provides the listener with a clear delineation that is neither too dry and analytical nor too musically colored in sound. Near-neutral in presentation, the sound presented allows the listener to discern good detail and clarity that many bass-heavy TWS earbuds can miss. I appreciate the lack of artificiality in the signature, which does come across as natural and organic, but without becoming too smooth or out of sorts.
On some planar units, the midrange “presence” can become a bit harsh and artificial to me, but the S10 presents the sound as mostly realistic, in a somewhat atypical manner. The level of clarity that comes through is quite good and on par with its peers, bettering some (see below). Suffice it to say, that the S10 fits in quite nicely in the group.
The slight warmth to the sound plays an additive role when using the “dynamic” EQ setting. This becomes obvious when using a device that does not have the ConneX app on it, such as my MBP. The “OG” sound coming forth on the MBP is quite pleasant, but lacks a bit of detail, even through Tidal. Good clarity helps to counter the lack of micro-details present, but I enjoyed using the app sound on dynamic through the R4 or my iPhone more than my MBP.
Staging & Dynamics:
The soundstage of the S10 is neither too big and grandiose nor too small. Almost equal in all dimensions allows for the music to spread out logically without skewing in any one direction. The midrange does afford a slight lift to the sound when music such as a saxophone or oboe is played, but not in such a manner that it comes across as in your face. Almost like a soloist moving to the front of the stage for emphasis.
Layering can suffer a lack of differentiation when the song becomes overly complex, but many fall prey to that without losing the good quality emanating from within. The S10 carries on with aplomb and good quality to the note weight, providing good definition and heft, which carries across the 3D stage. Differentiation suffers, as mentioned, but the quality offered is still quite good due to the added dynamics when using that particular EQ setting.
Instrument placement is still good, especially since that cubic experience in presentation allows a finite area to discern said placement. Periphery instruments such as percussive support instruments play their roles on the outer edge, with good depth filling that edge note. This allows the inner instruments to fill in the airy placings between. I found that the tuning led to a melding very near the center, but without feeling too intimate. A funneling effect leads to a narrower scope in presentation, but one that still carries the music accordingly.
Pairings:
My favorite pairing was the HiBy R4, which is now my go-to daily use DAP. I have better-sounding DAPs for sure, but the versatility adds to the equation. Especially since it is my newest DAP as well. An affordable DAP that can stream Tidal & Qobuz easily and play SD cards makes the R4 eminently adaptable. Using the ConneX app, I still used the “dynamic” setting on EQ, which made the bass reach lower, while using Tidal (which enhances bass anyway). I still found the sound to be a bit complicated when the music was, but on songs such as Ibrahim Maalouf’s “Fly with Me,” the individual solos came across as reaching and detailed. Solos such as the trumpets provided enough breathiness to give very good depth while affording space for the notes to linger when called upon.
My iPhone 13 Pro Max was next on the list, and the pairing functioned quite well together. The iPhone is of course limited to AAC CODECS, which makes for a less-than-perfect atmosphere. That said, I was able to play around with the EQ mimicking the Spirit S5’s customization, which added a bit more detail to the notes. This would be a very competent pairing, especially knowing phone calls can be handled well. As such, our son had no problem hearing me on a wind-driven wave day on the lake. I could hear him easily as well. Anymore, this does not seem to be an issue with most competent TWS earbuds. The S10 certainly falls into that category.
My least favorite pairing was with my MBP, even using Tidal or Qobuz. While the pairing worked to present the music, I found it to be a bit thin in note weight and a distinct lack of depth came about, which hindered the presence of the music. Maybe I am being too picky after the good luck of the two other sources listed above, but I could hear a distinct difference. I found it acceptable, but had I not heard the other two first, would most likely have appreciated the sound more.
Select Comparisons:
UM U-Free TWS:
Technical:
Using the Qualcomm® QCC5144 24bit/96kHz high-resolution audio chip, the U-Free has BT 5.0 along with a high magnet 10mm carbon nano Dynamic Driver plus the latest technology silver palladium bone conduction. Bone conduction has been around for a while in UM’s IEMs as well as others such as Fir Audio, to enhance the bass response. It works.
The included app allows you to customize EQ, update the firmware, and change ANC. Battery life (noise cancelation on) of approximately 7+14h (earbuds + charging case) and (noise cancelation off) 8+16h (earbuds + charging case) is a bit on the low side, but the unit is close to three years old. Multiple tips are included for more fit customization and I found myself using a smaller tip than usual for a deeper insertion into my ear.
Design:
I find the beige coloring to be a nice change from the normal all-black units. The shape is a bit bulbous, but I found the 10mm dynamic driver unit and sound chamber. With proper tip choice, the seal is better, giving a better fit, too.
Controls are on the faceplate, which makes for easy use and can be customized somewhat in the app.
There is excellent tactility to the case, making for an excellent feel without the fear of dropping it.
I recall that the U-Free was one of the first to include foam tips for better fit, and thankfully when mounted, still fit in the charging case. I remember lamenting that others did not do this and had to make the foam tips removable to accommodate proper fit when using those others.
Performance:
With a proper fit, the bass reaches deep and accurately, with some rumble, too. I found the level of clarity in the U-Free to be better overall than the S10, but lacked a bit of musicality, tending more towards accuracy than emotion, like the S10.
Clarity comes across as better without losing the weight of notes, giving more detail to the music, without becoming jumbled or conflagrated. I really like the tuning of most UM IEMs, having kept the UM Maestro V2 since I purchased it, and appreciate the family similarity here.
Where the Edifier goes for musicality and a naturally organic sound, the UM goes for accuracy with a distinctness of sound over the emotive effect. Both are very good at what they do, and you will have to decide which you prefer.
A&K UW100MKII:
Technical:
The A&K is the second iteration of the company’s TWS earbud, touting an AKM 32-bit DAC, a Knowles balanced armature driver, and Qualcomm’s QCC 5141 chipset. BT is 5.0, which while not the latest is still quite competent.
Multipoint connectivity allows the user to play from their computer and answer a phone call when needed, switching back automatically. A total of 29 hours of playback can be had when using the case, which is on par with the S10 and better than the U-Free.
Using passive ANC the UW100MKII does not use deliberate ANC, instead relying upon four levels of “ambient mode” to quell outside noises. The A&K even allows you to change the internal DAC filter much like their DAPs, ranging from Sharp Roll-off to Short Delay with its four settings.
Wireless charging is also supported in the case, when needed.
Design:
Another unique design, the faceplate carries a pentagonal shape, acting as the touch area for ambient mode, play/pause, etc. It is a large earbud, larger than the U-Free, but thankfully a multitude of tips is also included for achieving a proper fit. I used my regular-sized tips for the A&K and isolation was very good. The larger size did become a bit of a bother after longer sessions, though.
Performance:
The A&K lies between the UM and the S10 in terms of sound. With clarity closer to the S10, but muddied a bit, the A&K can come across as smooth as the S10. The level of detail retrieval is closer to the U-Free though. I found it a bit bass-boomy, too.
That extra bass can overshadow the sounds coming from the top end, making them seem withdrawn while hindering the midrange’s ability to push forward. That bass reach is low, but combined with the muddy character of attempting to be a basshead TWS earbud, covers what I consider one of the best midranges around in the TWS market.
A near-miss letdown by the veiled signature.
Bowers & Wilkins Pi7 S2:
Technical:
The Pi7 S2 carries a 9.2mm dynamic driver and a single balanced armature on each side. Adaptive Bluetooth through aptX comes about, with easy connection and re-connection when the unit is taken out of the case.
Battery life though, borders on horrendous at “up to 5 hours with ANC off.” In this day and age, that is unacceptable, even if the sound coming forth is exceptional. A total of 16 hours from the case can add to the use, and a 15-minute charge will yield 2 hours. Wireless charging is also supported.
ANC can be set to on, off, or auto, which is the company’s version of adaptive ANC. B&W has always been at the top along with Sony & Sennheiser, regarding their ANC technology and thankfully that carries down to the TWS earbuds. I will add that when engaged, the bass becomes quite boomy.
Design:
B&W has always had a flair for design dating back to their home speakers, and the Pi7 S2 carries that tradition on. With a round push-button-like platform, the Pi7 S2 carries touch controls on that round surface. The model I have is dark blue, which to me makes this the best-looking of the tested models.
The larger knob and earbud make it eminently grabbable, even if it sticks out a bit too much for my liking. Fit is excellent though, with different tips offered to accommodate almost everyone.
Performance:
There is no getting around the booming bass when ANC is engaged. Many manufacturers use the extra bass to cover external noises, and unfortunately, B&W is one of them. At least on their TWS earbuds. I do have a wireless headphone in for review that has ANC but does not hinder audio quality.
That deep-reaching bass is appreciated in genres such as jazz or blues but can hinder the levels of detail coming forth in others. Fortunately, B&W knows a thing or two about tuning, which can counter that with good levels of detail retrieval, and superb vocal treatments.
The Pi7 S2 has probably the best overall sound of the models here, falling slightly behind the U-Free in the level of clarity, but the musical nature of the sound coming forth makes up for that.
That said, it is much costlier, and if I were to go this route, I would skip the Pi7 S2 and go straight to the Pi8 (same price) or the new Pi8 for the same price.
finale:
Edifier is known for producing quality products at an affordable price. They also produce powered speakers and headphones, easily fitting into an upscale system. Wiljen has been privy to their high-end powered speakers and respects the effort. I have a pair of the company’s R1280T BT speakers and like the sound quite a lot.
Knowing this and knowing how I really like the Stax Spirit S5, I appreciate the tuning from the S10. With good detail retrieval and a wonderful midrange, the S10 comes across as natural, and organic but with warmth as well. This can be EQ’d out by choice from the app a bit, but compared to other quality offerings at this range, the S10 does fall behind in the level of clarity offered.
What it does bring is a very good fit, and the ability to customize controls, as good as any out there. The app is also a positive, what with the redesign, and while simplistic in EQ choices, the ability to provide a custom setting that can be carried across sources and other listening devices is a definite positive.
The sound is natural, organic, and without any unnecessary spikes that can come about from TWS devices. Those spikes can be seen as “countering” external noises, which is what ANC is for. The adaptive ANC of the S10 is the way of future ANC technology and it works well. Just like the rest of the S10.
While not head of the class in terms of audio performance (see comparisons), the Edifier Stax S10 does enough right to balance the discrepancies, making for a thoroughly enjoyable TWS earbud, and one that will see regular use in my rotation.
Stax S10
Intro:
Recently, having come off the Edifier Stax Spirit S5 review, I was eager to try the new TWS earbud from the company. The Spirit S5 took the good parts of the S3, making them better while enhancing the sound, too. I came away very impressed with the new model. So, when offered the S10 for review, I wholeheartedly agreed. I knew nothing about it and thought this would be a good opportunity to try a TWS earbud from Edifier after several wireless headphone models.
The S10 is mine to keep, but may be asked back for any reason. This will not play into my review, nor should it. Plus, this unit will not be flipped. That is still majorly uncool.
The unit was checked for functionality and then played on various devices for 75 hours before critical listening happened. I have always believed that the user is interested in how the unit sounds “down the road,” and not just in a new condition.
Specs:
12mm modular planar magnetic driver
Qualcomm QCC5181 Bluetooth SoC BT 5.4
Bluetooth Protocol: A2DP, AVRCP, HFP
Charging Port: USB-C (Type-C) Input: 5V⎓ 200 mA (Earphones), 5V⎓ 1A (Charging Case)
Charging Time: About 1.5 hours
Frequency Response: 20Hz - 40kHz
IP Rating: IP54
Playtime: ANC ON: 18 hours, ANC OFF: 28 hours (15 min for 2hrs playtime)
Audio Codecs: LHDC 5.0, LDAC, aptX™ Lossless, aptX™ Adaptive, aptX™ Voice, Snapdragon Sound™, AAC, SBC
Sound Pressure Level: 92 ± 3 dB(A)
Net Weight: Approx. 56g
In The Box:
Edifier Stax S10
Case
USB-C charging cable
Ear tips in 5 sizes
Owner's manual
Quick start guide
Gear Used/Compared:
UM U-Free TWS ($349)
AK UW100MKII TWS ($299)
Bowers & Wilkins Pi7 S2 ($399)
iPhone 13 Pro Max
HiBy R4
MBP
Unboxing:
The unboxing experience of Edifier products has always been top class, and the S10 is no different. From a hard cover slide-off sleeve to the same material of the inner box, it is solid and upscale.
Removing the top lid, you are first presented with an "envelope" that contains the manual and quick start guide. Underneath, you are presented with the case, and the buds inside. Below are pegs, which hold the various sized (and color coordinated) ear tips.
Lifting the plastic formed cutout, you have a box, which contains the charging cable (on the short side), and a nice carrying pouch for keeping the case and cable in together. A thoughtful inclusion.
Nothing frilly, nothing missing. That to me typifies Edifier in their presentation.
Design:
The S10 carries the shape of older BT devices before they were turned into earbuds. I was not a fan of the shape until I put this particular set in my ear. Knowing the fit is one direction, the fit is very good.
Smooth, glossy, black plastic abound on the earbuds, and they do draw fingerprints, unfortunately. The “face plate” does carry a sparkly black tint to it, which is subdued and classy to me. There is also a microphone hole on that face plate.
The bulbous chamber backs the shorter nozzles, making for that good fit of which I spoke. The long flange does not carry any controls on the faceplate, which hopefully can be fixed in the next iteration. To me, that surface is begging for slide volume controls much like the current crop of wireless headphones have.
The actual control center lies on the flange’s top side. A press of the control area activates the necessary functions. This to me could be better thought out, with the incorporation of that fabulous face plate in my opinion.
Handling the TWS units was easy, too, with good tactility due to the sharper shape of the flanges. Upon removal, the sound does stop, which is pretty typical and much appreciated.
The shape also carries three microphones per side, with one just above the nozzle, one on the front of the flange (closer to your mouth), and one on the faceplate.
Tech Highlights:
The 12mm planar driver is purported to be the first of its kind with ANC. Its ultra-thin diaphragm 2μm polymer substrate is engineered for fast and accurate transient responses, which planars are known for. The push/pull magnet ensures equal forces across all movements, further stabilizing sound reproduction.
Using the company’s patented 2nd generation EqualMass™ wiring technology for steady piston-motion planar driver performance also aids in the speed of sound reproduction. This symmetric supporting wire stabilizes the diaphragm for a more uniform response.
With a total thickness of 10μm, the S10 driver system presents itself as highly musical.
Each pair is calibrated together to ensure musical accuracy across both sides, something they also do on the S5 headphones.
Wireless Connectivity:
Qualcomm’s QCC5181 chipset drives BT5.4, allowing for CODEC support of LHDC 5.0, LDAC, aptX™ Lossless, aptX™ Adaptive, aptX™ Voice, Snapdragon Sound™, AAC, and SBC. Snapdragon sound can only be used currently with devices that support such technology. I did not have anything of the sort in-house.
With the ability to multi-connect, you can play music on your laptop or DAP and then answer a call on your Smartphone. Returning to music is automatically taken care of once the call ends.
Qualcomm’s 3rd generation adaptive ANC comes with the S10 and can be toggled on or off within the ConneX app. I used the adaptive ANC for the majority of the testing period.
Battery Life:
When using ANC, battery life (with case) is limited to 18 hours. Using ANC off allows up to 28 hours of usage with the case. A 15-minute charge in the case will yield 2 hours of listening.
I do wish that TWS earbud battery technology would catch up to some of the monstrous levels afforded on wireless headphones. Hopefully, that day is coming.
App:
At first glance, the app seems quite rudimentary. Delving further into the settings, you are presented with a whole host of features and functions. Knowing this, I immediately entered the “Control settings” and set “volume up” for a double pinch on the left earbud and “volume down” on the right. I rarely use the FF or REW functions on wireless items, so this made sense to me.
You can also set press sensitivity and such things as “find my product” in the menus. Moving back to the main screen, you can access the noise cancellation controls as well as “Sound effects” (EQ), and game mode to keep latency low (89ms).
A custom EQ allows for four frequency bands to be adjusted, just like the S5 (which makes sense; it’s the same app), along with the level of Q-factor, which increases or decreases the center of the frequency involved. This can be used to make the notes “fatter” or “thinner” allowing an adjustment to attack and decay. I did play around with it on the S5 and found it useful. The involved frequencies can also be customized to better acclimate for your tastes by long pressing on the number at the bottom.
You can share your EQ settings via the “More” button at the top of the EQ screen.
Activating the EQ settings does cause the music to pause while the setting is adjusting. A minor annoyance to me.
Sound Impressions:
The following sound impressions were made using the S10 tethered to the iPhone 13 Pro Max, MBP, and HiBy R4. Comparisons are noted below. Impressions are listed here using no EQ other than the “dynamic” setting on the iPhone and R4. The MBP running Tidal was left to the hands of whatever Tidal threw its way.
Summary:
The Edifier Stax S10 comes across with a near-neutral sound with a punchy albeit not deep-reaching bass. Using the ConneX app, you can tailor the sound to your delight. The familiar planar sound in the upper mids takes to the forefront, presenting succinct “S” sounds without too much tizziness or sibilance. Mids sit slightly above the middle but could be mistaken for dead-center on many recordings. As such, it pulls the ends together, melding the sound signature into a cohesive mass of sound.
Tight bass lines almost hide the lack of true sub-bass reach, but if you listen you can quickly discern the true depth isn’t there like a dynamic driver. That said, when called upon, such as with hard-hitting bass drums, the presence you feel replicates the missing deep reach.
Timbre:
The S10 comes across as one of the lesser-colored TWS earbuds I have heard of late. While many espouse deep-reaching bass or artificially accented top end, the S10 provides the listener with a clear delineation that is neither too dry and analytical nor too musically colored in sound. Near-neutral in presentation, the sound presented allows the listener to discern good detail and clarity that many bass-heavy TWS earbuds can miss. I appreciate the lack of artificiality in the signature, which does come across as natural and organic, but without becoming too smooth or out of sorts.
On some planar units, the midrange “presence” can become a bit harsh and artificial to me, but the S10 presents the sound as mostly realistic, in a somewhat atypical manner. The level of clarity that comes through is quite good and on par with its peers, bettering some (see below). Suffice it to say, that the S10 fits in quite nicely in the group.
The slight warmth to the sound plays an additive role when using the “dynamic” EQ setting. This becomes obvious when using a device that does not have the ConneX app on it, such as my MBP. The “OG” sound coming forth on the MBP is quite pleasant, but lacks a bit of detail, even through Tidal. Good clarity helps to counter the lack of micro-details present, but I enjoyed using the app sound on dynamic through the R4 or my iPhone more than my MBP.
Staging & Dynamics:
The soundstage of the S10 is neither too big and grandiose nor too small. Almost equal in all dimensions allows for the music to spread out logically without skewing in any one direction. The midrange does afford a slight lift to the sound when music such as a saxophone or oboe is played, but not in such a manner that it comes across as in your face. Almost like a soloist moving to the front of the stage for emphasis.
Layering can suffer a lack of differentiation when the song becomes overly complex, but many fall prey to that without losing the good quality emanating from within. The S10 carries on with aplomb and good quality to the note weight, providing good definition and heft, which carries across the 3D stage. Differentiation suffers, as mentioned, but the quality offered is still quite good due to the added dynamics when using that particular EQ setting.
Instrument placement is still good, especially since that cubic experience in presentation allows a finite area to discern said placement. Periphery instruments such as percussive support instruments play their roles on the outer edge, with good depth filling that edge note. This allows the inner instruments to fill in the airy placings between. I found that the tuning led to a melding very near the center, but without feeling too intimate. A funneling effect leads to a narrower scope in presentation, but one that still carries the music accordingly.
Pairings:
My favorite pairing was the HiBy R4, which is now my go-to daily use DAP. I have better-sounding DAPs for sure, but the versatility adds to the equation. Especially since it is my newest DAP as well. An affordable DAP that can stream Tidal & Qobuz easily and play SD cards makes the R4 eminently adaptable. Using the ConneX app, I still used the “dynamic” setting on EQ, which made the bass reach lower, while using Tidal (which enhances bass anyway). I still found the sound to be a bit complicated when the music was, but on songs such as Ibrahim Maalouf’s “Fly with Me,” the individual solos came across as reaching and detailed. Solos such as the trumpets provided enough breathiness to give very good depth while affording space for the notes to linger when called upon.
My iPhone 13 Pro Max was next on the list, and the pairing functioned quite well together. The iPhone is of course limited to AAC CODECS, which makes for a less-than-perfect atmosphere. That said, I was able to play around with the EQ mimicking the Spirit S5’s customization, which added a bit more detail to the notes. This would be a very competent pairing, especially knowing phone calls can be handled well. As such, our son had no problem hearing me on a wind-driven wave day on the lake. I could hear him easily as well. Anymore, this does not seem to be an issue with most competent TWS earbuds. The S10 certainly falls into that category.
My least favorite pairing was with my MBP, even using Tidal or Qobuz. While the pairing worked to present the music, I found it to be a bit thin in note weight and a distinct lack of depth came about, which hindered the presence of the music. Maybe I am being too picky after the good luck of the two other sources listed above, but I could hear a distinct difference. I found it acceptable, but had I not heard the other two first, would most likely have appreciated the sound more.
Select Comparisons:
UM U-Free TWS:
Technical:
Using the Qualcomm® QCC5144 24bit/96kHz high-resolution audio chip, the U-Free has BT 5.0 along with a high magnet 10mm carbon nano Dynamic Driver plus the latest technology silver palladium bone conduction. Bone conduction has been around for a while in UM’s IEMs as well as others such as Fir Audio, to enhance the bass response. It works.
The included app allows you to customize EQ, update the firmware, and change ANC. Battery life (noise cancelation on) of approximately 7+14h (earbuds + charging case) and (noise cancelation off) 8+16h (earbuds + charging case) is a bit on the low side, but the unit is close to three years old. Multiple tips are included for more fit customization and I found myself using a smaller tip than usual for a deeper insertion into my ear.
Design:
I find the beige coloring to be a nice change from the normal all-black units. The shape is a bit bulbous, but I found the 10mm dynamic driver unit and sound chamber. With proper tip choice, the seal is better, giving a better fit, too.
Controls are on the faceplate, which makes for easy use and can be customized somewhat in the app.
There is excellent tactility to the case, making for an excellent feel without the fear of dropping it.
I recall that the U-Free was one of the first to include foam tips for better fit, and thankfully when mounted, still fit in the charging case. I remember lamenting that others did not do this and had to make the foam tips removable to accommodate proper fit when using those others.
Performance:
With a proper fit, the bass reaches deep and accurately, with some rumble, too. I found the level of clarity in the U-Free to be better overall than the S10, but lacked a bit of musicality, tending more towards accuracy than emotion, like the S10.
Clarity comes across as better without losing the weight of notes, giving more detail to the music, without becoming jumbled or conflagrated. I really like the tuning of most UM IEMs, having kept the UM Maestro V2 since I purchased it, and appreciate the family similarity here.
Where the Edifier goes for musicality and a naturally organic sound, the UM goes for accuracy with a distinctness of sound over the emotive effect. Both are very good at what they do, and you will have to decide which you prefer.
A&K UW100MKII:
Technical:
The A&K is the second iteration of the company’s TWS earbud, touting an AKM 32-bit DAC, a Knowles balanced armature driver, and Qualcomm’s QCC 5141 chipset. BT is 5.0, which while not the latest is still quite competent.
Multipoint connectivity allows the user to play from their computer and answer a phone call when needed, switching back automatically. A total of 29 hours of playback can be had when using the case, which is on par with the S10 and better than the U-Free.
Using passive ANC the UW100MKII does not use deliberate ANC, instead relying upon four levels of “ambient mode” to quell outside noises. The A&K even allows you to change the internal DAC filter much like their DAPs, ranging from Sharp Roll-off to Short Delay with its four settings.
Wireless charging is also supported in the case, when needed.
Design:
Another unique design, the faceplate carries a pentagonal shape, acting as the touch area for ambient mode, play/pause, etc. It is a large earbud, larger than the U-Free, but thankfully a multitude of tips is also included for achieving a proper fit. I used my regular-sized tips for the A&K and isolation was very good. The larger size did become a bit of a bother after longer sessions, though.
Performance:
The A&K lies between the UM and the S10 in terms of sound. With clarity closer to the S10, but muddied a bit, the A&K can come across as smooth as the S10. The level of detail retrieval is closer to the U-Free though. I found it a bit bass-boomy, too.
That extra bass can overshadow the sounds coming from the top end, making them seem withdrawn while hindering the midrange’s ability to push forward. That bass reach is low, but combined with the muddy character of attempting to be a basshead TWS earbud, covers what I consider one of the best midranges around in the TWS market.
A near-miss letdown by the veiled signature.
Bowers & Wilkins Pi7 S2:
Technical:
The Pi7 S2 carries a 9.2mm dynamic driver and a single balanced armature on each side. Adaptive Bluetooth through aptX comes about, with easy connection and re-connection when the unit is taken out of the case.
Battery life though, borders on horrendous at “up to 5 hours with ANC off.” In this day and age, that is unacceptable, even if the sound coming forth is exceptional. A total of 16 hours from the case can add to the use, and a 15-minute charge will yield 2 hours. Wireless charging is also supported.
ANC can be set to on, off, or auto, which is the company’s version of adaptive ANC. B&W has always been at the top along with Sony & Sennheiser, regarding their ANC technology and thankfully that carries down to the TWS earbuds. I will add that when engaged, the bass becomes quite boomy.
Design:
B&W has always had a flair for design dating back to their home speakers, and the Pi7 S2 carries that tradition on. With a round push-button-like platform, the Pi7 S2 carries touch controls on that round surface. The model I have is dark blue, which to me makes this the best-looking of the tested models.
The larger knob and earbud make it eminently grabbable, even if it sticks out a bit too much for my liking. Fit is excellent though, with different tips offered to accommodate almost everyone.
Performance:
There is no getting around the booming bass when ANC is engaged. Many manufacturers use the extra bass to cover external noises, and unfortunately, B&W is one of them. At least on their TWS earbuds. I do have a wireless headphone in for review that has ANC but does not hinder audio quality.
That deep-reaching bass is appreciated in genres such as jazz or blues but can hinder the levels of detail coming forth in others. Fortunately, B&W knows a thing or two about tuning, which can counter that with good levels of detail retrieval, and superb vocal treatments.
The Pi7 S2 has probably the best overall sound of the models here, falling slightly behind the U-Free in the level of clarity, but the musical nature of the sound coming forth makes up for that.
That said, it is much costlier, and if I were to go this route, I would skip the Pi7 S2 and go straight to the Pi8 (same price) or the new Pi8 for the same price.
finale:
Edifier is known for producing quality products at an affordable price. They also produce powered speakers and headphones, easily fitting into an upscale system. Wiljen has been privy to their high-end powered speakers and respects the effort. I have a pair of the company’s R1280T BT speakers and like the sound quite a lot.
Knowing this and knowing how I really like the Stax Spirit S5, I appreciate the tuning from the S10. With good detail retrieval and a wonderful midrange, the S10 comes across as natural, and organic but with warmth as well. This can be EQ’d out by choice from the app a bit, but compared to other quality offerings at this range, the S10 does fall behind in the level of clarity offered.
What it does bring is a very good fit, and the ability to customize controls, as good as any out there. The app is also a positive, what with the redesign, and while simplistic in EQ choices, the ability to provide a custom setting that can be carried across sources and other listening devices is a definite positive.
The sound is natural, organic, and without any unnecessary spikes that can come about from TWS devices. Those spikes can be seen as “countering” external noises, which is what ANC is for. The adaptive ANC of the S10 is the way of future ANC technology and it works well. Just like the rest of the S10.
While not head of the class in terms of audio performance (see comparisons), the Edifier Stax S10 does enough right to balance the discrepancies, making for a thoroughly enjoyable TWS earbud, and one that will see regular use in my rotation.
Vanillacones
Thanks for your review! I actually just blind purchased these a day or two before you posted this review, so I guess you beat me to it, haha! Should arrive some time next week. What do you think of its ANC performance, especially at its price point?
ngoshawk
ANC performance is quite good, but as of most lately, tip-dependent. It seems ANC development is getting better and less intrusive for the sound signature, and this is a good example of that tech.
Cheers.
Cheers.
