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Rockit Sounds R-50

92% Positive Reviews
Rated #14 in Universal Fit


Pros: Treble detailing, spacious sound, wide soundstage and layering

Cons: Bass, not enveloping, slightly thin sounding at times, a tad sterile

Just want to state up front my review rating is an absolute rating, not one based on comparative performance, pricing etc. 


These are my observations after using an iBasso DX50, MacBook air, FiiO E17 and Sansa Clip Zip as test sources. I found very little variation between those sources with the DX50 maybe bringing out a little bit more richness and depth.

Highs: Well what can I say, the treble is of such a high quality I was surprised. They can be a tad sibilant depending on what you are listening to but generally I would say the highs are of a very high quality not far off earphones that cost a lot more. Detail is there in spades and the wide soundstage and layering is also very good.

Mids: A repeat of the highs really. Very wide, layering even better than in the highs. The start of the weaknesses appears in the mids however. At the lower end things start to fade away and lower mid sounds that should be there are pushed way back. This takes away from the richness of the sound making the overall presentation quite thin. Such a shame.

Lows: If you are even a mild bass head then look the other way, these do not deliver anywhere near the right level of bass. I could not find one track that sounded as it should. The bass was either veiled or just not there at all. I tried every tip available and others I had. Nothing helped. If Rock-it can get the bass right on their next release we could be on for a fantastic pair of earphones.


Overall: After living with these for a couple of months I am deeply frustrated. Rarely at the lower price ranges have I found anything near what I could call 'very good' sound quality. Most things sound cheap, unnatural, unbalanced or just plain wrong. I am happy to report that if you can live without much bass then these are a bit of a bargain. The build quality, as others have pointed out, leaves a lot to be desired. They feel very delicate and may break easily. Another point is the physical size of these, they are tiny. I find that a good thing as the fit snuggly in the ear and once inserted remain in place no matter what you are up to.


I am very much looking forward to the next release!


Pros: Incredible detail, massive soundstage, great build, super comfortable

Cons: Memory wire seems a bit iffy, stock tips are pretty terrible, may need an EQ and/or better tips to truly shine

First, I would like to thank Rockit Sounds for giving me a 50% discount on these for this review.


The Rockit Sounds R-50 is unreal.


The moment the R-50 arrived at my house, I was ecstatic and literally jumping for joy. I had heard so much about these, I just had to have the experience of actually hearing them. 

I took them out of their container and gazed upon what would become my favorite IEM. Dual balanced armatures, braided cables; it was perfect.

I put them in, and began to have a sonic experience that I'd not ever heard from an IEM before. I put on some of my favorite tracks and was immediately overtaken by the incredible quality of the R-50. 


This IEM is so incredible.


Build - Sturdy plastic housings with soft silicone cover. It feels excellently crafted. Memory wire is very soft. The joint between the wire and housing worries me ever so slightly.

Comfort - I've never used any IEM that was this comfortable. The silicone casing around it really takes away any discomfort that I've had with other IEMs.


Isolation - Pretty average. Greatly improves with tri-flange tips.

Sound - I can't believe how good these are. The overall presentation is so clear; so detailed. I was extremely impressed with my first listen, and I'm still impressed every time I put them in my ears. 


The lows are well extended, detailed, and most definitely not overwhelming or bloated. However, they don't really add any warmth to the sound. With the stock tips, the lows can be underwhelming. 


The midrange here is perfectly reproduced. I find it to excel at whatever genre I play. Both female and male vocals sound lifelike. The R-50 has such clear and balanced mids. They're some of the best I've heard. Definitely better than a good amount of over-ears I've used around the price.


Treble frequencies are what I find these do best. I've not heard any kind of clarity like this before. It was the first thing that I noticed with these. Snares, cymbals, everything sounds so crisp. It can get sibilant, however, especially with the stock tips. 


The soundstage of the R-50 is pure bliss. There is so much space in the presentation. It's absolutely incredible, and, without a doubt, I like it more than almost every over-ear I've tried.


Accessories - 3 sizes of silicone tips, clamshell carrying case, and airline adapter. The tips are pretty bad, if you didn't notice. I wouldn't dare use them for casual listening. The sound greatly improves with aftermarket tips.

Tips and sound changes

Stock - Like I said, these are pretty bad. The bass is very underwhelming, and the treble is very sibilant, even for me, as I like bright treble.

Shure Gray Flex - Much, much better than the stock tips. Sibilance is reduced, while bass comes out to what I would consider to be a natural/balanced level. 


Shure Gray Flex substitutes from eBay seller 'lostearbuds' - My favorite single-flange tip for the R-50 for sure. Has the same sonic changes as the real Gray Flex tips. The fit is amazing too. These are the most grippy tips I've ever used. I actually think I prefer these over the real Shure Gray Flex. Plus, they're much lower in price.


Shure Black Soft Flex - These were what I used before the Gray Flex and substitutes arrived. Still a good improvement over the stock tips. Compared to the Gray Flex/subs, these still have some of sibilance and bass is a little underwhelming, but nowhere near the level of the stock tips.


Shure Tri-flange - Sibilance is 98% removed, and the entire frequency spectrum comes into harmony.


Etymotic Tri-flange - Sibilance is completely removed. Other than that and possibly the fit (which I found these to be much more comfortable), these tips sound identical to the Shure tri-flanges. The Etymotic tri-flange tips are my most recommended tri-flange tips, and tips in general for the R-50. I recommend these most.

Monster/Generic tri-flange - I kind of just took a shot with these. These are about on-par with the Shure Black Soft Flex, but with a tiny bit more control on the sibilance. 

Hopefully to come sometime in the future...

Westone STAR tips
Westone True Fit tips
Etymotic Glider tips

Etymotic Foam tips

Shure Black Foam tips (Olives)

Shure Yellow Foam tips

Assorted Comply tips

The Rockit Sounds R-50 is probably the best IEM you can get with this kind of signature (balanced/articulate) at this price ($120).

I absolutely recommend it to anyone looking for this kind of sound. The R-50 is a true winner.


Pros: Good speed, soundstage, resolution and detailing

Cons: Slightly thin sounding in mids, memory wire

When talking about Rock It Sounds, most of us will not be so familiar with this company, or maybe never heard of them, since they’re new company which’s just jumped in for earphones and headphones industry for just about a year. However, their very first flagship in-ear monitor is very successful in term of the reputation and sales.

Rock It Sounds R-50 earphones

So I think it’s worth talking about and doing a review for their flag ship model – the Rock It Sounds R-50.

I first got a pair of Rock It Sounds R-50 (to be called R-50) several months ago. The earphones come with Knowles’ TWFK dual balanced armature drivers.
One delivers mids and treble (highs), another driver for bass. These same drivers also be used on other famous iem including Ultimate Ears 700, Fischer Audio DBA-02 and Brainwavz B2 but the tuning, cables and materials are different so the sound on these earphones are not identical.

R-50 comes with twisted pair cable, which looks good and sturdy, also using this kind of cable can help microphonics issue (noise from cable). The ear piece is wrapped by gray silicone which the manufacturer said it’s for better fit.


To test the sound quality, I use Hisoundaudio Nova N1 DAP as main audio player, Rockboxed Sansa Clip+ and Sony Ericsson Xperia Arc S for some daily use. No amp required here. For the files, I use FLAC and some 320kbps MP3.

Sound Quality
Sound Signature – Rock It Sounds R-50 provides a bright and very analytical sounding, every single micro detail is very clear. Some might find that the imaging and the instrument size is rather small. I prefer to use Comply Foam TX100 tips to get the fuller sound and to tame highs a bit; thus we still can get very good instrument separation and details.

Sound Stage – Sound stage in very good and airy, 3D presentation with good depth and width. This area is the strong point of R-50 that hardly be beaten by others.

Treble (High) – Bright, clear and very accurate, which is very common for earphones which use TWFK drivers. Details in the treble are very good. But this can be too harsh and dry for some people. Some might easily get fatigue with this kind of high. Bad record or bad files will provide the obvious unwanted noise, so please be careful to use with good quality files.

Mid – Mid is good, not forwarded nor recessed, still very clear. But adding a touch of warmth and sweet would be perfect.

Bass (Low) – Bass is there (You don’t say?), well I can say the R-50 is absolutely NOT for basshead. Mid bass is good, clear with decent impact. Deep bass is there but in the background. Still, adding more bass here would be perfect for my taste.

Conclusion – Audiophile who prefer the top notch details will easily fall in love with this little pair of earphones, while basshead or people who prefers the warm tone should stay away. However, this is bang-for-bucks earphones. With $120 price tag, I can’t think of other earphones in this price range that can beat R-50 in term of audio quality.

- Top notch details.
- Great sound stage and instrument separation.
- Price.

- Sound signature is not for everyone


Pros: Decent detail

Cons: Highs are sharp and brittle and in some cases downright painful, Bass is missing on a level I haven't experienced before.

I ordered these biased on the excellent reviews they received here on headfi. If you listen to anyone listen to me. These headphones sound BAD and just plain wrong. I have tried these from 2 sources now. First was my Sound Blaster Z... Completely unusable when connected to it. The highs are so harsh and sibilant that they make everything seem unpleasant tinny and just awful. Cymbal crashes will make you cry in pain, Voices will sound shrill and like nails on a chalkboard and the bass is just gone. Not there in the slightest. Completely and totally missing. Kick drumbs sound like a high pitched click instead of a full boom like they should. Its quite strange.  Using my other source Fiio e7 they are usable but just sound mediocre. It's not as clean as the Creative and the highs are cut off which is beneficial to these headphones. Either source I use the sound stage is tiny and everything sounds very thin and unpleasant. 


Compared to my Sennheiser HD598's and my AKG K550's they are just not even in the same ball park. I was hoping they would sound a bit like the 550's but they don't they just sound awful. 


Lastly the cords with the way they wrap around your ears is just plain stupid. It's hard to put them on, and they don't stay formed enough to stay hooked over my ears. I have to constantly squeeze them together to keep them formed around the back of my ear. When I bought them I figured I would just not use that and use them like normal ear buds but if you do that the drivers are upside down and are out of phase therefore making them sound very strange. 


DO NOT buy these. They are horrid. I took the gamble on them so you don't have to. 


Pros: Balanced Sound, Amazing Detail, Very quick, Great Sensitivity and moderate impedance.

Cons: Lack of tips, case it comes with is a little small.

I love accuracy and detailed audio reproduction and I was looking to get a set of Etymotic HF5's but after talking to Billy at Noisy Motel I was introduced to the Rockit R50, these had unbelievably good write-ups here on head-fi and are a great price so I thought I need to check them out.  Billy's customer service was great and he agreed to wait at the office to meet me after hours (thanks again if you're reading this Billy!).


I currently have a pair of Etymotic MC5's, and Monoprice 9927's as my other IEM's, the R50's absolutely blitz both of those units.  The sound is comparable to my AKG K702 with a little more bass and a much smaller soundstage and less air (as can be expected).


At first I was very impressed, but then I let some music play through them at moderate volume for a few hours (I'm a burn in believer, even if it probably doesn't work with BA drivers).  After this I put a set of Etymotic triple-flange tips on and I put them back on and listened to some music I was very familiar with, WOW!.


I could hear new details in tracks I've listened to countless times with countless headphones, I could finally hear what those background voices in some of my Boards of Canada tracks were saying.  The natural sound and neutrality of these IEM's is very very impressive, they seem so effortless and balanced.  They handle bass well, they handle treble very well (although not super-high airy treble, but I think this may be because they are actually inside my ear), the mids are a tiny tiny bit recessed but really I'm being very picky. 


These are nothing short of amazing at the $129 I paid for them.  Also if you're like me and you don't want to fiddle with memory wire and looping these over the ear you can just straighten the wire out and use them like normal IEM's (although the Left side goes in the Right ear).  I've heard complaints about build quality but I was told this had been rectified with the newest version although they are still not the most durable IEM's available, but with them having a silicone coating on the outside these feel quite good and I don't feel like these are just going to fall apart. 


I've noticed they do sound better out of my o2 than out of a portable player (the treble seems to be more apparent out of the o2).  I am going to make a 75 or 150 ohm impedance adapter to use with these (and my Sony MDR 7520's) soon, mainly so I can turn the amp up more than anything else (120db sensitivity!) but I'll report back if it changes the sound at all.


If you're like me and you crave accuracy and detail in your music then give these a go, you will not be disappointed!


Pros: Sound quality (transparency, balance, detail, soundstage), comfort.

Cons: Accessories

Let’s start with the accessories, which are 3 pairs of silicone tips (small, medium and large size), airline adapter plug (should replace it with foam tips or something else more practical IMO) and a small nylon carrying case.

Even with the stock tips isolation is very good, it does isolate from almost all unwelcome outside noises but you will still be able to hear car beeping or someone calling you loudlybigsmile_face.gif which is quite important to me.

Comfort wise they are rather good too, housings are light and small, though my ears did ache from wearing them first few days, now I don’t even feel that they’re in.

Housings are well built and they won’t break unless you want them to, but in this price range you can find better solutions if durability is a top priority. Cable is on the thin side but feels sturdy enough to not be afraid of tearing it accidentally.

And I acctualy like their looks, it suits well my military style cool.gif


And now about the sound. First what I noticed listening R-50 is how transparent they are comparing to all the earphones I’ve listened before, there is no bass leakage or background noises whatsoever, at least to my hearing.

I find R-50 to be perfectly balanced.  To my hearing bass isn’t lacking at all, it’s clean, tight and punchy, with short decay time.

There is slight midrange domination over the other frequencies. Midrange is clean and accurate and intimate, vocals sound very natural and close, which is rather thrilling.

Just as everyone describes it treble is sparkly, clean and with great extension. At the first listen I didn’t like treble being too sparkly and even tended to use equalizer, but after few hours of listening I got used to it and started enjoing it popcorn.gif

Separation and detail is probably as good as it can get, you can clearly distinguish different instruments even on a very busy and fast track. R-50 also offers good soundstage but not better than my SoundMagic E30. 

Many state R-50 to be too analytical and fatiguing. I in my turn consider them quite musical and enjoyable for casual listening smily_headphones1.gif


Pros: Detail, Speed and Presentation

Cons: Some of the worst build quality, Design and Comfort.

^^( First I would like to thank Rob Reyna of In Ear Customs who got me the R-50 to make up for my reshelled GH-ERC-DMS getting stolen in POST )


I am writing this review as I will be parting with my R-50 within another day or two, the left cable has come loose and rotates around the housing, making the IEM unusable as it can only be worn around ear.



On to the sound quality, this for me is the TWFK to be. A role model of sorts. The sound quality is excellent, imaging is the best I have heard from an IEM. The treble dont get very peaky like my GH-ERC-DMS(another TWFK). Mind you, the treble will definitely get annoying to listeners sensitive to brightness/treble emphasis also with the sibilance that is present.

I don't think TWFK Knowles implemented earphones really need a second introduction to detail reproduction, as far as I know they are second to none. 


The bass is real tight and fast. Does n't show much sub-bass body but the mid-bass is excellent in quality and to an extent satisfying in quantity. 


With comply tips, the sound really is something astonishing. The brightness is reduced by a good margin and the over-all sound remains airy yet delicate and detailed. A slightly warmer presentation with extended treble and better bass body while the sibilance in the mids is nullified. I think, this is the best presentation for me and reminds me of the RE-272 by Hifiman, with better bass and better present treble.


The imaging is spectacular and beats all my previous earphones by a mile, and the transient response is also stunning with these earphones. 


As evident, my only gripe is the ridiculous,sub-par, atrocious build quality that really annoys me to have it send back.


I ll do a couple of comparison for you other IEM owners out there although much of them is from memory(which is clear)


1. Sony MH1C


The sony is very very very forgiving compared to the R-50. The bass is the highlight, yet the mids are present to a very appreciable extent and the treble just dies down but is well extended. They resolve a very good amount and is generally a perfect signature for the casual listener. Their sound stage offers very good width and height but loses in accuracy and imaging to the R-50, which also has an amazing height in its presentation yet not so much width. Micro-detailing is completely polar to the MH1C, and the overall sound is very very warm to my ears to get the real hang of things in music.




The GH-ERC-DMS was my first TWFK Knowles dual BA monitor that provided excellent imaging, great resolution and adequate bass. With comply tips the sound was excellent albeit brighter and more treble tilted than the R-50. The micro-detail is on par with the R-50 but the refinement and imaging is not. The mids are also much more forward than on the R-50 and the over all balance is towards to the uppermids-treble.


3. SE-535


Mid-forward presentation with the best bass I have heard from an IEM. They are not so resolving as the R-50 nor has the height in presentation. Their build quality was just light years ahead of the R-50, but to me that is almost what you pay for. I think the R-50 is much more transparent of the recording and their imaging still beats the $300+ Shures. Their transients are good yet not in the level of the R-50. The bass is very refined on the SE-535 and much better in quantity and quality over the R-50s.


4. RE-272


So far my reference, I do not know what exactly happened to these godly IEMs or why Fang Bian decided to replace them with the new line up. Their paper filter version(which I auditioned first) is more of what I prefer over the metal filter version(which I acquired second). I think the R-50 offer much better imaging and is also more transparent of the recording than the RE-272. The R-50 has better treble presence, yet quality of the treble on the RE-272 is simply better. The bass is very low in quantity on the RE-272 and the R-50 just feels better with the low-end. The mids on both are fairly flat, yet I think the RE-272 has the edge. 


If you want an IEM for re-shelling get the R-50, that's all I have to recommend to you. I do not think that they are supposed to be used for long time and are like disposable cameras, only good for the roll of film inside.


Thanks for reading 


Pros: Mids, Highs, Lows evenly balanced and sounding great

Cons: Not the coolest to look at

I just got these and so far these are an exceptional pair of in ear headphone.  I would not say they are aestetically beautiful but who cares when you put them on it is something great.  I will update the longer I have them but right now very happy.



I have owned these for a long time now.  The quality of sound production holds up.  For me oem are just supposed to be fun.  These pull that off amazingly.  I put some memory foam tips which improved the comfort.  I am very happy with my purchase.  Sadly, I work outside twice a week at my job and I was hit by a storm which I ended up being drenched.  Hopefully, my r-50s survived being drenched.  If they don't I am pretty sure I will buy them again.


Pros: Bass, mids, treble and soundstage are of very good quality.

Cons: Bass quantity is small for those who like a lot of bass.

Here is my review on the audio quality of the Rockit Sounds R-50.


Besides the headphones/IEMs, from my experience audio quality is also affected by the following conditions, which I list in order of impact:

1) Equalization.  This is a must for me with enough equalizer bands to be able to tailor the sound to what my ears desire.  31 bands or more is the ideal.  So, PMPs with 5 or 7 EQ bands do not qualify for me.

2) Quality of recording.  This is also a must, in order to have a good audio quality.  Nowadays there should be no CDs with low audio quality, but they still exist and there is not much that I can do about this.

3) Amplification.  Not for louder sound, but for richer sound.  Sound is richer with an amplifier not only with headphones, but also with IEMs.

My audio setup consists of the following:

1) My desktop PC using foobar2000.  This program has an 18 band equalizer and an added 31 band equalizer plugin that has exactly the same frequencies that are included in analog equalizers used for live sound.  This renders a total of 49 bands.  If I only count once the bands that are present (repeated) in both EQs, there is a total of 45 bands available to tailor the sound, ranging from 20 Hz to 20,000 Hz. (20 kHz).

2) WAV lossless tracks.
3) E-MU 0202 USB audio interface (24-bit/192 kHz DAC) with Kernel Streaming drivers.

Sound Preference

I like a lot of bass with more deep bass than mid bass.  I thirst (or hunger?) for bass rumble (subwoofer type) and bass punch.  At the same time, bass spilling over the middle and high frequencies (muddy sound) making them muffled or veiled is unacceptable, even in small amounts.  Mids that are neither forward, nor recessed are the best for me.  Boxy (cave like, coming from a bottle) sounding mids, are unacceptable.  There is a minimum of mids sharpness (like in a TV screen sharpness) or detail that my ears ask for.  After that level, more detail is good but it does not add much value to the sound experience.  A good treble decay is appreciated by my ears.  The bigger the soundstage, the better the sound.


I equalize my R-50 with what looks like a cup cake equalization.  The mid frequencies are flat (from 200 Hz to 3.15 kHz).  The bass frequencies are raised with a constant upward slope (upward straight line) starting at 160 Hz down to 20 Hz. The high frequencies are also raised with a constant upward slope (upward straight line) starting at 3.5 kHz up to 20 kHz.  How does this sound to my ears?

1)  BASS

The good:  Even though they are not overabundant, there is a good amount of both deep bass and mid bass and their quality is excellent.  The bass that is there is just exquisite.  The bass placement is excellent with a perfect balance between deep bass and mid bass.

The not so good:  No subwoofer bass here.  Bass going deeper in the frequency spectrum would be an improvement.  Extending the bass (not moving it, but expanding it) to the left (deeper bass) in the frequency spectrum and making the mid bass a little more responsive when asked for by the equalizer, would be a nice improvemet.

Bass enjoyment rating:  8.0 out of 10.

2)  MIDS

The good:  Mids placement is perfect.  They are neither forward, nor recessed.  The tonality is also perfect.  They sound airy and natural.  Mids sharpness (like in a TV picture sharpness) or detail, is excellent.

The not so good:  With many recordings, the middle frequencies lack a little body; that is, the notes lean toward being thin on the lower middle frequencies.  This is due to the limited amount of bass.  But, I address this issue here because the effect is heard in the middle frequencies.

Mids enjoyment rating: 9.4 out of 10.


The good:  There is a large amount of treble.  This is especially important with tracks that do not have a good amount of treble from their recording.  Treble is perfectly placed, is fluid and sounds natural.  The treble frequencies that cause fatigue and make the treble sound piercing (<6 kHz) when there is an abundance of them, are restrained to just the right amount as compared to those frequencies (around 10 kHz) that make the treble sweet.

The not so good:  If treble decay (ssssshhhh) were a little longer, the treble would be perfect.

Treble enjoyment rating:  9.7 out of 10.


The good:  Imaging is very good and coherent.  Nothing sounds out of place, like too forward or too recessed, or too far to the right or the left.  Separation is also very good with no part of the sound rubbing against any other part of the sound.  Soundstage is excellent with an appreciable sense of width, height and depth.

The not so good:  My ears ask if there could be a greater sense of spaciousness from the R-50.  They do not let me tell them that these are IEMs and not headphones, and that is too much to ask from IEMs.

Imaging, separation and soundstage enjoyment rating:  9.5 out of 10.


5)  OVERALL ENJOYMENT:  Let’s add all the ratings so far and divide by the number of them to get the overall enjoyment.  That would be (8.0+9.4+9.7+9.5)/4 = 9.15

6)  COMPLEMENTARY REMARKS:  The large amount of good quality treble and the easily attainable good sound quality on the R-50 (with just a cup cake equalization), allow for these IEMs to sound acceptable with recordings that have sound quality flaws in the treble and mid range frequencies.  This should also make them work well with sources that have a limited amount of equalization capacity, such as PMPs or cell phones.


My R-50 sound quality is noticeably improved with amplification.  Still, amplification has a greater impact on sound quality with other more bass capable headphones/IEMs.

Music with electronic drum machines (EDM), such as trance and the like, doesn't give me a satisfactory bass impact through the R-50.  Their bass impact is far below from what I want when listening to EDM music.  For everything else, the R-50 are top performers!

When you come from IEMs that have a fuller sound or a bigger sound room than the R-50, you feel like the sound of the R-50 is underdeveloped.  It is like driving a four wheel drive vehicle with a 4.0 liter engine and switching to a smaller car with a 1.6 liter engine.  At first, there is the feeling that the smaller car has a weak engine.  After some time driving it, then the driver gets used to the smaller engine power and realizes that it is more than enough to make the smaller car accelerate quickly and develop good speed.  That happens to me all the time when using a bass heavy IEM that has a bigger sound room and switching to the R-50.  The sound is really disappointing right after switching IEMs.  It stays like that for about one hour.  After then, my ears get used to it and the high quality of the R-50's sound is felt and greatly enjoyed.


If someone is wondering if my sound setup could make any headphones/IEMs sound good to me, other headphones overall ratings would make things clear on that matter.  Here they are:

GRADO SR80: 8.5; Technics RP-DH1200: 7.3; Philips SHE9500: 7.3.


Over the ear IEMs will never be as comfortable as straight down style IEMs.  Fortunately, the R-50 can be worn in a straight down position.  To do so effectively and comfortably, I wear the right earphone on my left ear and the left earphone on my right ear.  This way, the earphone-ear ergonomics work as intended by the designer(s).


UPDATE (December 1, 2012):  Beware of the fact that the R-50 do not have enough bass, for bass lovers.  I am one of them, and the R-50 are like dessert to me.  I can only eat so much of it, but I want some of it.

Rockit Sounds R-50

The flag ship IEM from Rockit Sounds with a Knowles TWFK driver thats tuned to be detailed yet smoother than many other TWFK based IEM's.

Driver TypeKnowles TWFK
Impedance31ohms, 110dB @ 1kHz
Additional InformationFrequency Response: 20Hz - 20kHz
Model Name/TypeMPNEAN/UPC
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