Letshuoer S15

Introduction:-

Hey guys, we have the letshuoer S15 today. This is the successor to the their famous S12/S12pro iem. So this is the most expensive planar iem in the recent times I have come across, so lets see how it stacks up with other planars and other similarly priced iems.

I have also shared a video version of the review at YouTube any support there in form of a view, A like or A subscribe is greatly appreciated. But if you so wish to read the written version you can read this.




Also as the title says, ifi go blu, qudelix 5k owners or any who loves to eq I highly suggest reading till end.


This is a review unit from letshuoer, but all the thoughts and opinions you are about to hear are my own.


Buy it here (Unaffiliated link) :-


Amazon USA - https://www.amazon.com/dp/B0CHJ42YHD

Amazon UK - https://www.amazon.co.uk/dp/B0CHJ42YHD

Amazon Japan - https://www.amazon.co.jp/dp/B0CKSXPPD4

Amazon Germany - https://www.amazon.de/dp/B0CHJ42YHD

Letshuoer Aliexpress - https://www.aliexpress.com/item/1005006156571806.html?

Letshuoer Website - https://letshuoer.net/products/lets...ve-filtering-module-hifi-wired-in-ear-monitor


I will be as usual following my bullet style format for better readability for those who are dyslexic and in general find it hard to read long paragraphs. I follow this guide in general from the British Dyslexia Association.


Lets get started!

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Build, Comfort and Accessories:-



1. The overall packaging of the S15 is fantastic! It punches way above the price in my opinion.



2. Inside the box you get the iem, two sets of tips one balanced tip and other vocal tips, the fantastic cable and 3 modular right angled jacks which is my preference, the case which is is made of this 3d printed palstic which feels very nice.



3. The retail price for the S15 is $330



4. The build quality of the iem is very nice, the shell is made of the same 3d printed plastic as the case. The outer plate of the iem is a metal.



5. It uses a 2 pin connector



6. The s15 has a 14.8mm planar driver. It also uses something called as the R-sonic passive filtering module.



7. These are really really comfortable to wear and I can wear them for hours without any fatigue.



8. Although the nozzle length is a bit short and some people might have some fit issue. For me the stock tips were fine.

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Sound Impressions:-



1. The overall sound signature of the S15 seems to be a w shape tuning but with a tinge of mid-bass and the treble a bit relaxed.



2. The overall sonic range is very coherent with each other. I explain more about it as I proceed through the review.



3. They are a very relaxing pair of iems



4. The overall timbre is really good, and there is a slight tinge of planar timbre.



5. They pair very well with neutral source in my opinion



6. I will be using the usual choice of source for my review.



Hiby FC6, Fiio BTR5, IFI Hip Dac 3, IFI Go Blu, Colorfly CDA M1, Colorlfy CDA M2, Muse Hifi M4, Fosi Audio N3, Aune Yuki, Hiby M300, Akliam PD4 Plus, Kinera Usb C dongle dac, Razer Usb c dongle dac, Fiio KA11, Fiio KA17 & My smartphone



7. They do require quite a bit of power to sound their best. Although they can be driven off anything but I do suggest using a decent pair of dongle dac for these.



8. These do sound their best when playing at higher volumes.



9. Sadly these aren't a low volume set.



10. All my testing is done at moderately high volume than usual also I used all the stock accessories.



11. But I found the best tip to be the wide bore penon blue tips which worked really well for this. If possible or you have issues I highly suggest checking out a set of wide bore tips with these as they open up the treble a bit.





Bass-


1. Now the bass here is mid bass focused rather than sub bass focused.


2. If you are someone who likes a nice well rounded meaty mid-bass this is an iem for you.


3. When listening to songs like crack crack crackle by sunny or waltz by sunny the mid bass punch is really tastefully done. And it sounds really nice and meaty.


4. But the lack of the sub-bass punch does leave a lot to desire. Although the overall sonic range is very coherent with each other, the lack of sub-bass with the good mid-bass atleast for me feels a bit off.


5. Like I can almost enjoy the bass region of the song, but the lack of that sub-bass punch does leave me a bit longing.


6. But if you listen to a lot of instrumental, this is a great as they sound really natural over here. Listening to asayake 1985 live fro Casiopea was a real treat. The natural tone and timbre of the instrument was really good! Surprising that a planar does this good.




Mids-



1. The overall mids of this iems are really nicely done


2. The male vocals are very well done. Vocals like Chris Cornell and Bill Withers sounds very warm and lush and very enjoyable.


3. Now this is the surprising part atleast for me, I thought that the way the tuning is done I would expect it to the female vocals to be bad.


4. But the female vocals here were really good and sounded really natural and good. Now I generally like a good almost shirlly harmanny female vocals but that also spoils the male vocals in my opinion. But I think the S15 does a fantastic job at balancing it sounding warm and also providing a good female vocals.


5. Now would I have loved the female vocals to have been a bit more shrilly, yes. But that would have spoiled the over relaxing vibe of the iem it has going on.



Treble-



1. Now the treble is fantastic over here if you are someone who is sensitive to how most chi-fi iems or harman tuned iems are tuned you will love these


2. The treble here is really good and well controlled.


3. When listening to the 1985 live album casiopea, the treble isn't that matured over here but it has enough details for me to enjoy the song.


4. If you are a treblehead, this isnt an iem for you.


5. It strikes a good balance between it giving me a good relaxing listen while also having that treble details.


6. Treble extension could have been a bit better



Technicalities:-

The overall technicalities is quite good, but it doesn’t not the technicalities that you would expect a planar iem to have. For me it strikes a good balance between it sounding good while also not sounding a detail monster



Soundstage & Imaging:-

The overall soundstage is quite meh, it has this ball of soundstage around your head. I personally like a good wide and deep spacious soundstage. But there are many who loves the in-ear feeling of the iem. If you are someone like that you will love this. The soundstage depth of the s15 is really nice but it isn't that wide.


The Imaging is average which is a bit of disappointment at this price point. I would have expected to be doing a bit good. The left and right transition is ok and nothing great.




Gaming Test:-

Here too they do an ok job and nothing great, where does shine here is if there is a lot of things happening during the game it doesn’t sound too fatiguing and due to the nature of its tuning it sound swell controlled. Although the not so big soundstage and imaging specially at this price point is meh. They are ok for casual gaming.

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Comparison & Recommendation:-


1. v/s 7hz Timeless AE – In Gizaudios recent video I said that one iem that I would like to own would be this and it still holds true. I love the big v this iem has and also the treble quality while having a big soundstage. S15 is a much relaxing listening and are very coherent overall across the range when compared to the AE.


2. v/s EA1000 – The ea1000 is harman done well. Its fantastic iem, but the ea1000 is quite a bit bright sounding when compared to the s15. If you are a treblehead ea1000 it is, if you are not one then the s15 makes a better purchase.


3. Now you might have seen my entire review, I speak about the shortcomings of the S15. During the starting of the review I also say that the ifi go blue, 5k and eq users to watch till end. Well here it is!





4. When using the S15 with ifi go blu and using the xbass+xpsace mode of it. They make a perfect pair. I personally have been using the S15 like this with a thin kinera cable and the penon wide bore blue tips. It has been great!



5. The xbass adding a tad bit more to the sub-bass and the xspace improving the soundstage a bit of the S15 works wonders! They sound so good now. If you own a go blu I highly suggest giving the s15 a try or atleast demo them.



6. Now I havent used the 5k but I guess you can eq the 5k and use it in a similar manner too.



7. You could also eq and add a bit of sub-bass and extend the treble a bit.



9. I think so with a bit of eq these sound really really good.



10. I think so the s15 makes for a great relaxing listening iem. But it isnt an iem if you want a detail monster. This isnt an iem for trebleheads either. This is an iem for those who like a bit warmer sounding iem.



11. And the biggest complaint for me is the price, I have no idea why it is priced more than double than that of the s12 pro MSRP or more than triple of the s12 which is available for $100 now. I think the s15 is a good iem, but the price is a bit too high.



12. The price could be the only barrier in my opinion from stopping people to buy this iem. If this was priced at $250 I think so it would make a great set at $330 its a bit of stretch. I really do hope these go on sale soon, so that more people could give these a shot.



13. So thats my review of the S15. I hope you liked, Thanks for stopping by!

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If you have any questions please feel free to ask me and also if you have any issues regarding this format of review please do comment I will try to mend it. Also sorry to those who are used to reading long paragraphs of review in headfi. I hope my review was upto the mark, I appreciate any feedback.

Again a big thanks to Letshuoer for making this review possible.

Have a great day ahead, Bye

INTRODUCTION

My experience with planars is not extensive. In fact, I only had the opportunity to test the Letsuoer S12, and while I even liked the tuning, I can't say I was thrilled. This time, courtesy of Letsuoer Audio, I have the opportunity to review their latest planar, the S15.

PRESENTATION







What is worth appreciating on first contact with the Letshouer S15 is the way the packaging design stays in harmony with the design. The packaging is nice, handy, and true to the color scheme of the headphones themselves. The composition of the package can be called richly equipped, as the headphones come with a modular cable with silver-plated copper conductors with 3.5, 4.4, and 2.5 mm terminations, and a set of tips (Vocal and balance) enclosed in a twist-off case covered with silicone plastic, also consistent in color. The headphones themselves look a bit plastic, and strangely enough, when inserting the right earphone you can hear a sound as if a component is peeling off, but I guess this is a coincidence only present in my copy.

SOUND



In the very first seconds of listening, two things emerge, an improvement over the previous S12 model: the strength of the bass and the amount of detail, especially in the high registers. As for the tuning itself, I would describe it as warm, a little bassy but also neutral (no basshead material), with no boost in the high registers. The S15 is a melodic set, with a fairly natural timbre, in which none of the frequencies are exaggerated, which makes for an enjoyable listening experience and is worth appreciating.

BASS:

There is plenty of bass. It is strong and springy. The emphasis is more on mid-bass, so the impact is clear. The problem for me, however, was that it's hard to get a clear texture. As a bass player, I was deficient in natural bass guitar presentation. I missed the "grunt" in songs with more jamming, but at the same time I can't say it's a bad bass, no, it's more like that woofer bass, filling the head, but also providing enough dynamics for most songs.

MIDS:

When it comes to midrange presentation, I have rather mixed feelings. On the one hand, the low-mid is clear, as if brought forward, allowing for a very good presentation of male vocals. Male vocals are natural (this is probably the most natural-sounding registers of the S15). As for the registers of the female vocals, hooked up to the upper mids, while they mostly sounded clean and pleasant, for me, turning down about 2-3dB around 1.1kHz and adding up to 5dB around 3kHz, brightened their timbre and providing the “claw” that I find lacking in this set. Unfortunately, the deficiencies in these registers also translate into the perception of overdriven (on overdrive or distortion pedal filter) guitars, which are so important in rock and metal, and with default tuning give the impression of being offset and muffled.

TREBLE:

In my opinion, this is the best-sounding frequency area and also the most attractive, because it is rich in detail, which the S15 pulls out of songs with incredible ease. Because of its warm tuning, I wouldn't dedicate this set to trebleheads, but the treble is very good in this set, and listening to it is a sheer pleasure. Listening to tracks that I thought I knew perfectly enriched my memories with new, previously unheard details. There is no concern about sibilants or irritating harshness, which seems to have been the bane of S12 and S12 PRO owners who are also sensitive to these registers. Here, it is delicate but rich, clean, and transparent. Bells, cymbals, clicks, and the like appear in unexpected places, enriching the listening, and while they last, they don't disappear beneath other sounds. Once again, this is for me the best part of this set.

TECHNICALITIES

As I wrote, the S15 can effectively pick out hidden details from the high registers of the frequency spectrum, which makes for very pleasant listening to songs. Instrument separation is quite ok, but tracking any instrument throughout the song may not work for you. Although the instruments are separated, at times they blend and the overall clarity of the track is not a strong point of this set. Imaging is at an average level, although the instruments appear from different sides, I can't say that the sound surrounds the listener from all sides ( although some sounds, such as the delicate pings of percussion instruments happen to surprise me with their place of appearance)

ANALYSIS BASED ON A FEW SELECTED TRACKS

In this section I would like to describe how the S15s performed when listening to selected tracks from different genres of music - maybe based on them it will be easier for someone to decide on the purchase:

Foo Fighters - Everlong



This track by Dave Grohl's band is practically a classic of rock music already, and for me a track with the help of which I can easily judge how a given set handles dense lines of distorted guitars against dynamic percussion. The reception of the track is pleasant, although I must add that the selectivity in the sound of the guitars is lacking it for me. The dark tuning produces a muffled effect, with the result that individual beats on the guitar strings blend while obscuring other sounds, such as snare drum hits or kick drum, which creates a bit of a wall of sound effect. On the other hand, the vocal line can be heard clearly and transparently. As for the treble, you can effortlessly listen to the sounds of sticks dancing across the drum cymbals and on the hi-hat, which, along with the vocals, is the best part of the listening experience.

Soen - Savia



The stanza of this track mostly consists of a slightly distorted bass guitar playing simultaneously with the drums as a backdrop to the vocal line. It's worth mentioning here right away the sound of percussion elements heard somewhere on the sides, slightly behind, at the beginning of the song. These are the percussion elements that the S15 handles brilliantly, unfortunately, some of the other elements like the snare drum and toms, lack sound clarity. The main lead line - i.e. the bass guitar texture on the overdrive - is also a bit lacking in claw. A small change with the help of the EQ, shifting 3-4dB from 1.1kH to 3kHz brings the bass guitar closer, adding texture, like the string "burr" , while improving the presentation of the drums. Meanwhile, as with the previous track, the vocals sound very good here.

Rhye - Last Dance



This track showcases the best features of this set. From the well-presented vocals to the clear sounds of muffled guitars, trumpets, choruses, and percussion it's a well-played track.

Jaco Pastorius - Come on, Come Over



Like the previous track, this one seems to be suitable for demonstrating the S15's best capabilities. The instruments sound great, selective, and natural. There's plenty of space here, which is probably why the S15 performs so well. Bongos and other percussion elements have a great effect. The presentation is very pleasant: saxophone in the left ear, keyboard in the right ear, bongos somewhere in the background, percussion in the center and although a little quieter, the hi-hat is clear and not lost, and trumpet phrases at the end - it's a good listen.

I don't want to over-describe my impressions of the tracks I listened to, so I'll try to generalize:

... not all genres of music are handled equally by the S15. Basing my judgment on personal sound preferences (because how else), I wouldn't plug in the S15 when I want to get a boost from the sound of energetic wild guitar riffs and dynamic percussion. The texture of the guitars on the overdrive is not what I like, and I also lack energy in the snare hits, but remember these are just my impressions, maybe someone will have a different one and someone will like this sound.

PAIRING

This successor to the S12 Pro, features easier drivability, which thanks to its modern design is possible even with just a phone, although with no power reserve, but listening at the full volume potentiometer of my Realme GT 5G is just too loud. To properly appreciate the capabilities of these headphones, however, it's worth investing something to breathe some power into this nearly 15mm planar speaker. During the testing period, I connected the S15 to various sources, from the category of portable devices, because that's what I'm interested in. I got the best results when paired with an old Fiio e07k (Wolfson WM8740), which, in addition to providing enough power, offered the greatest clarity and naturalness of sound of instruments, and quite good dynamics (with gain at +12db). The Sony Nw-A55L DAP (mr. Walkman mod) also worked quite well, which, although not as powerful, was sufficient and allowed for pleasant listening, not devoid of dynamics. Disappointing was the pairing with the Moondrop Dawn Pro (2xCS43131), through the 4.4 output, which, for reasons unknown to me, weakened the strength of the notes, making listening boring and less engaging. As tips, I recommend choosing something that brightens the sound, such as the Whizzer ET100, which additionally dovetails nicely with the color scheme of the set itself, or, for example, the BVGP W01, which, while not brightening the sound, will slightly weaken the bass and improve the melodicity, while maintaining treble clarity and improving holography.

SUMMARY

I would be lying if I didn't write that I was a bit disappointed with the S15. On the one hand, it is a very precise tool for extracting details from songs, melodic, proving itself in certain genres of music and quite easy to drive, but unfortunately, it also comes with some flaws. The tuning of the S15 is, in my opinion, a bit too linear, with some shortcomings in the upper-mid, which leaves no impact on the so-called "claw", which I simply miss in this set, but also on the clarity of the sound of the instruments. I've never been a fan of planars, and like the S12, the S15 hasn't changed that. I still find it quite unengaging playing that doesn't make my heart beat faster. However, I take into account that my expectations of sound presentation may differ from those of others, so I allow for the possibility that if someone liked the S12 and S12 PRO, but was bothered by the harshness of the treble, they may find something for themselves in the S15.

LETSHUOER S15

Leisurely plays your library…

Pros:
+ Well-balance and mature tuning.
+ Good bassline performance from a planar stand-point.
+ Good mid-range substance and presence.
+ Plays male vocals rather well.
+ Anti-shout tuning.
+ The treble still runs high without put forward.
+ Low symptoms of planar timbre; have some of the least metallic treble.
+ Good for long listening session. Comfortable & Pleasant.
+ Not source picky.
+ Well-accessorized.

Cons:
- Pricing is a bit steep but still worth it IMHO.
- Sub-bass could use with higher pressure and sustain.
- Lower-treble recession is affecting the transient of higher-pitch female vocals.
- Treble clarity and definition are second-rate vs its rival.
- Micro-detail aren’t the best in planar game.
- Dynamic-range aren’t the widest. Not the most engaging.
- Does not have the blackest of background.
Hence affecting the clarity of instrument placement & separation.
- Staging & Imaging capabilities are just average.
- A smidge harder to drive than some of its counter-part.
- Not for treble-head nor bass-head.

LETSHUOER S15 4 ★★★★

▓▒░ SOUND-SIGNATURE ░▒▓
The S15 fall within the variation of W-shape tuning. The S15 offers quite a well-balance sound with a slight mid-bass biased.


▓▒░ BASS/LOW-END ░▒▓

● It is undeniably bassy a set with a smooth, clean and fast response that is neither too energetic nor anemic. The sub-bass delivery is not its greatest forte. Despite it having an adequate sub-bass presence, it doesn’t really extend down low-end. The sub-bass lacks pressure and sustain. The quick decay and short sustain sacrifice some of the echo/reverberation overtones on vocal and instruments. Hence, the sub-bass kick and rumbling sensation doesn’t really resonate that strongly but it should be more than sufficient.

● The mid-bass is noticeably denser/thicker with greater prominence. The transient is fast but not with a lot of impact. The mid-bass punch and slam gives off adequate sense of thump and tactile boom for as long as you don’t expect a visceral attack coming from it. Regardless, the bass-drop rendering is kept clean and smooth, while the Ghetto bass have decent elasticity and rebound-rate on replay. The good having a speedy bassline is, even with a hint of leftover mid-bass spilling onto the lower mid-range, it doesn’t introduce any dirt of veil high up.

● All and all, the bass performance is good but not exceptional, partly because of the bass layering and detailing are mediocre at best. Dynamically, the low-end lacks a bit of engagement factor than a bass enthusiast would desire. In all fairness, it is pretty well executed from the lens of planar. Unless you’re a hardcore bass-head or a bass connoisseur, the S15 bass performance will render more than enough joy for most people.


▓▒░ MID-RANGE /VOCAL ░▒▓

● Surprisingly it quite the mid-centric in its presentation. In a sense that vocals and instrument that lies in this region appears to be rather intimate/forward within the tri-frequency. On the balance of “euphony” and “clarity”, the bias is tilted slightly towards the former. Vocals and instrument have good substance and presence. The vocals often come across as being lush and well-bodied as it is not missing any of those low-end-to-low-mid wetness or warmth. The energy dispersion from the lowest (deep male voice) to the highest (high female voice) range are well-judged. Both male and female vocalist performs nigh equally as rewarding on stage. There is hardly any shouty-ness, honky-ness, harshness or graininess upon vocal rendition which is an impressive feat.

● As for nitpicks? The vocals texturing (raspy, gritty, hoarse, breath etc) may have the best transparency but it is not severely lacking. Some of the elements of the reverb or resonance on vocal and instrument are not properly captured. Due to the slight coloration coming from the mid-bass and recession on lower-treble, there are times when female vocal that lives on the higher octave suffers from sounding a tad too thick/husky. And the intonation of higher pitch of female vocal can lack in energy when compromised. If cleaner and energetic female vocal is more to your preference, you might want to consider its main competitors instead. The overall transient-attack on strings/guitar plucks, piano hits and violin strums has a more rounded edge to them with a rather precise decay. Most instrument that lies in this region never seems to lack in terms of fundamental presence. The note hits aren’t the most distinct but don’t necessarily sound blunt per se.

● Regardless of its shortcomings, it does not stop its mid-range from being inoffensive and musical, as it maintains a good level of naturalness to the overall tone and timbre.

▓▒░ TREBLE/HIGHS ░▒▓

● Thanks to the warm hues coming from the low-end, it gives the treble a pleasant experience. It is quite cossetting to listen to. It is never tiring on longer session as well. Having said that, this level of treble performance might not give a strong impression for treble-heads out there as It just doesn’t carry the same brilliance and air in comparison to most planar. But it is not overly dampened to a point of being too dark and dingy. As a result, even with its relatively dark nature, synthetic noise such as electronics still gives off a nice sense of zing, shimmering or twinkling effect on the overrun. Not to mention, those metallic sheen or sharpness inherit by a planar-driver is seemingly less. In fact, the S15 has got some of the least symptoms of planar timbre, making it one the more natural sounding planar on the market right now. Throughout the test, there was no unwanted resonance is heard. The sibilance tolerance is very high while peaks and troughs are kept to a minimal degree, giving its treble a rather smooth response. Instruments like hit-hats and cymbals are very inoffensive as they’re not very distinct in the mix but the decay is noticeably smooth, keeping its naturalness in check. With the right synergy, one could actually crank the volume to quite a high degree without distortion issue.

● As for the downside, the treble definition is not the best in the game. Due to the darker nature of its tuning, micro-nuances will not be as transparent as some of its main rivals. The higher notes seem to have a smoother edge to them, those whom prefer a crispier playback might find it lacking a tad of bite. Fortunately, the treble decay is rather precise as it is smooth and doesn’t linger unwantedly.

● In short, the treble quality is good but top-notch. The treble still runs high without put forward. It’s got good qualities of naturalness combined with a mature response. But one thing for sure, treble sensitive people will greatly appreciate the S15. It is borderline inoffensive and more importantly, fatigue free.


✧ ════ •TECHNICAL PERFORMANCE• ════ ✧
- The overall HEAD-STAGE is quite good. The headroom is decent with adequate depth but plays with more width. The mid-range/vocals have good intimacy without sounding overly forward while the bass have slightly more presence over treble region.

As for INSTRUMENT SEPERATION is decent. Being the stage not most grand or open sounding. The gap/spaces between each element of sound are mostly adequate but aren’t the most generous. On top of that, the background is not the blackest as if there is a thin layer of mist masking the vision of sound positioning which also has something to do with the darker nature of its treble response. As a result, separation process is not giving the clearest cut between elements. Hence, it is not the best when trying to reproduce a highly complex tracks as everything will starts to blend together.

- The STERO-IMAGING definitely not its greatest forte. INSTRUMENT PLACEMENT has accurate positioning but it is not the most vivid. Transition of sound between channels are smooth but not the sharpest on its projection.

- The DETAIL HANDLING is good but not outstanding. Therefore, monitoring or analysing music with this set is not your best bet. Macro-detail seems solid but micro-details don’t really pop as you’d expect from a planar driver. However, it does a remarkable job in highlighting detail in subtle manner rather than shoving everything onto your eardrums. Its DYNAMIC RANGE may not the widest. Therefore, is not the most engaging or emotional to listen to. This trait is pretty much aligned with its smooth and relax tuning.

- In trade, it possessed one of the more natural TIMBRE in its class. The metallic traits of the treble are still there but they have successfully tone it down to be more palatable for timbre-head. Vocals and instruments have a good sense of body to them. The attack on transient is fast but not the most impactful. The decay is mostly on the quick side of the tempo with decent sustain level and smooth release. In other words, note hits/instrument don’t sound unnatural but lacks a touch of realism to them. In a sense that you’ll hear it but lacks a just a touch of dynamic feel on replay.

~ HEAD-2-HEAD : IN-DEPTH COMPARISON ~
vs 2022 7Hz Timeless feat. Kinera Leyding.

BASS
- Timeless has better sub-bass extension & attack. Rumbling sensation has higher pressure & sub-bass kick has more punch.
- S15 mid-bass seems thumpier and has more body/thicker. Giving it a heftier and boomier low-end.
- Ghetto bass is bouncier with the S15. Bass distortion element is better captured with the S15.
- Due to slower decay and longer sustain of the Timeless, it makes it the warmer set of the two. The S15 may sound thicker but it’s a faster bass, seemingly colder in tone when comparing the two.
- Being warmer, the Timeless soothes its listener with a better sense of atmospheric ambience. Hence, it is better at capturing reverb and echo on instrument and vocals as well.

MIDS
- Timeless presentation is more intimate with higher pinna-gain.
- Male vocal on the Timeless have a slight sharpness on vocal transient. Due to added presence region and upper treble. S15 seems to do male vocal better as it is lusher, fuller and smoother as well.
- Female vocal on the Timeless is slightly leaner but it carries more energy up until the highest voice range. It doesn't face that insufficient energy that occurs on the S15 sometimes, which makes the Timeless the more emotional set for female vocal enthusiast.
- Vocal texturing and reverb is slightly better on the Timeless.
- Instruments like piano, xylophone, strings (guitar, electric guitar, violin, viola), flute has greater transient with longer decay and better sustain. Not only it sounds more distinct but also more complete from end to end of notes. But the S15 will have thicker note-weight. All of that is by a slight margin.

TREBLE
- Timeless has better treble extension overall. It sounds more airy and more open up top. It does sounds brighter and livelier.
- Timeless treble sounds clearer with more bite to them. Whereas on the S15 there is a hint layer of haze which makes it not as clean.
- Synthetic noise, electronic zing and shimmer sounds crispier with the Timeless.
- S15 seems to have better mid-treble presence. Piano key for e.g that lives on this region has better clarity.
- Timeless has more apparent planar timbre; can sound a tad too sharp especially with brighter DAC/AMP.
- S15 treble has more laid-back nature. It is will be better suited for treble sensitive folks.
- Hit-hats & Cymbals on the Timeless is better define with good decay.

STAGING
- The Timeless sounds a tad wider which extend just behind your ears. But the S15 offers slightly more depth. In terms of height, they're nigh identical. The MP145 is still there King of stage in planar game.

IMAGING
- Transition of sound between two-channel and sound localization is definitely sharper and more vivid with the Timeless. Spatial cues have a clearer image overall.

LAYERING & SEPARATION
- Both of them offers just about the same space & gap between elements. Due to darker background on the Timeless, each element of sound has a clearer cut.
- Both tend to suffer just a tad on busier tracks. Something like the MP145 has better consistency in maintaining each border of sounds.

DYNAMICS
- Clearly, the Timeless has a wider sense dynamic-range from top to bottom.
- It’s more fun. Its more emotional. You're mostly in tune with your music.
- The S15 is a bit more laid-back and chill, sounding less attached to your music.

DETAIL RETRIEVAL
- Other than mid-bass and mid-treble region, the Timeless is better defined. Micro-nuaces seems to have ever so slightly better clarity and transparency.

TIMBRE
- None of them sounds inorganic or unnatural to my ears.
- The S15 will offers more note weight across the range and has lesser planar timbre; sharpness, metallic-ness of treble.
- However, the attack on the Timeless is more incisive with the decay being slightly longer and the notes has higher level of sustain. The reverberation /echo on the overtones makes the sound even more complete as a whole. Hence, most of the time, I find the note definition of the Timeless is more complete from end to end. Some of this attributes are slightly missing with the S15.

"If you prefer more sub-bass, more emotional female vocal with better treble clarity or something that is more fun in general. The 7hz Timeless is the one to pick.
However, if you like something that is more laid-back, less offensive, listen a lot to male vocals, and very allergic to planar timbre. S15 is the better buy."


◤FINAL THOUGHTS◢
The S15 do have its own place in planar market. It has some good qualities that can attract listeners as none of its competitors follows the suit of its tuning. It is not a set that will wow you on short blast, but it is a set that you’ll appreciate on longer sessions. Unless you have a specific acquired taste for a profile, then it can either be a hit or miss. My biggest gripe with the S15 is not really the performance but rather the price-tag itself. For about the same amount of money, you could actually buy the MP145 and 7hz Timeless together which is not a good sign in terms of value. However, some people would actually take the S15 over the other two in a heartbeat. I knew quite a number of audiophiles whom enjoy this set thoroughly. They really shower praise this set quite abit. And I can see why. Beside the 7hz Timeless, S15 is definitely one of my favourite Planar I’ve tested. I ended up liking it more and more, the more I spent time with it.

[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)

====================================
LETSHUOER S15 [PLANAR]
Tuning : Mild W-shaped/Warm- Neutral.
= Quality =
Bass: 6.5/10 Mids: 6/10 Treble: 6.5/10
Male/Female: 6/5.5
= Technicalities =
Detail & Resolve: 6.5/6.5
Instrument Replay/Timbral Accuracy : 7/10
Dynamic-Range/Transient : 6/10
Head-stage [W-H-D]: 6-5-5
Layering & Separation: 5.5/10
Stereo Imaging 5.5/10
Ambience : 5.5/10
Cleanliness: 6.5/10
Build/Comfort: 6/9
Value: 6/10 [AS TESTED]
Personal Enjoyment: 6/10

SETUP (As tested)
Stock Cable 4.4 PLUG
Spinfit CP100 (M)
Tanchjim SPACE (Main)/ xDuoo Link2BAL MK-I
DDHifi TC07S/BAT AUDIO OTG
====================================
7HZ Timeless feat Kinera Leyding [PLANAR]
Tuning : Neutral With Bass-Boost/Warm- Mild-V
= Quality =
Bass: 6.5/10 Mids: 6/10 Treble: 7/10
Male/Female: 5.5/6
= Technicalities =
Detail & Resolve: 7/7
Instrument Replay/Timbral Accuracy : 8/10
Dynamic-Range/Transient : 7/10
Head-stage [W-H-D]: 6.5-5-4
Layering & Separation: 6/10
Stereo Imaging 6.5/10
Ambience : 6/10
Cleanliness: 7/10
Build/Comfort: 6/9
Value: 8/10 [AS TESTED]
Personal Enjoyment: 7/10

SETUP (As tested)
Kinera Leyding 4.4 BAL PLUG
Spinfit CP100 (M)
Tanchjim SPACE (Main)/ xDuoo Link2BAL MK-I
DDHifi TC07S/BAT AUDIO OTG
Pros:
+ Pleasantly warm yet engaging.
+ Great note weight and density.
+ Good technical performer. Except for the staging.
+ Comfortable light-weight shell.

Cons:
- Not the cleanest sounding treble, a whiff of haze.
- Potential fatigue on longer listen.
- Only work best with warmer or clean dac/amp.
- Teased planar timbre.
- Perculiar head-stage (lacking depth)
====================================

SOURCE & GEARS​

Native FLAC Files [44.1Khz 16bits-96Khz 24bits]
Foobar2000 [Laptop] [Ugreen USB C Adapter]
Huawei P20 PRO [Phone][ App- Foobar2000]
Dongle DAC/AMP only :
Tanchjim SPACE
xDuoo Link2BAL
DDHifi TC07S

PLAYLIST (AS TESTED)​

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 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 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 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 Genjitsu no Yohane – Far far away
2023 Genjitsu no Yohane – Hey, dear my friends
2023 Anna – 花のように (Hana no You ni)
2023 riria. – 貴方の側に (Anata no Soba ni)

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 loaner unit. Big thanks to the @Edmund for making this possible!

If you like me to review your IEM/DAC/AMPS please hit me up:
https://www.facebook.com/DevaPainAkatsuki/

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