FitEar TO GO! 334


Pros: Mids, mids, bass, coherent tuning, soundstage, build quality
Cons: "Polite" treble, springiness of cable
This is a review of the FitEar ToGo! 334 4-driver balanced armature IEMs. FitEar is a Japanese IEM company, whose products have gotten a lot of praise on head-fi for their sound and build quality. Expensive as all get out, and pretty hard to pick up new outside of Asia due to the limited number of suppliers. Some comparisons to UE 900s are noted below, as that is the IEM I was coming from.


Build, fit and other non-sound related factors:

Generally, these are built extremely well. FitEar apparently does a full acrylic injection for the IEMs or something along the lines of that, so the TG334s are very solid feeling in the hand. Honestly, they don't look that good compared to a lot of top-end CIEMs and mainstream top end IEMs (SE 846, K3003, IE800), as they are a single-shade deep translucent black with a matte black finish on the faceplate which is not too interesting to look at. You're probably not buying IEMs purely for the look, and the TG334 will appeal to people would like the "stealth luxury" concept. If you rock white Common Projects rather than red Balenciagas kicks on the daily, then these will appeal to you. The cable provided is of above-average quality bordering on excellent. They are on the slim side, have a very nice Oyaide plug, and easy to manage memory wire. However, they're a bit springy and not too soft.

Fit-wise, I'm finding them to fit very nicely. The shells are extremely big, but they sit comfortably outside the ear. The silicone tips included are pretty trash, aftermarket tips are highly recommended. People have recommended going to JVC Spiral Dots, Ortofons, Complys, Spinfits, and the whole lot. My favourite tips with these were the Ortofons, followed closely by the Spiral Dots. They just disappear in the ear with these. The TG334 do not have a very "tight" seal, but it's easy to take on and off and isolation levels are good. 

For other things, the TG334s include a decent amount of accessories such as extra tips, a Pelican hard case, a soft case (which I didn't get in my example), and a cable clip. Packaging is sober, pretty reflective of Japanese sensibilities.



The TG334s are quite a sensitive IEM, my phone and laptop can get these much louder than the other IEMs and earbuds in my stable (UE 900, Xiaomi Piston, VE Monk). As an example, on my Xperia, a good listenable volume for my UE 900s are around 80%, whereas these are closer to 50% of max. They also don't hiss too much which makes them fairly easy to live with in terms of the source. Honestly, I haven't noticed too much of a difference switching between my various sources on hand (Xperia Z2, Dell 13 Chromebook, ALO Island). I found it to have great synergy with Chord Mojo.

The overall sound signature I'd classify as mostly flat with a slight uptick in the bass and tiny bit of roll-off in the treble. Bass has good weight and extension for an IEM, but it's not the quickest. Mids are very nice on these, which are good for vocals. Really lush and involving, listening to acoustic on theses connected to Chord Mojo gave me goosebumps with how much weight the vocals and guitars had.The highs are good, but not emphasized. Overall, it's a balanced, but pretty fun sound signature, and makes my UE 900s sound positively veiled in comparison.

From a soundstage and clarity front these get high marks. Sound stage is more intimate for a high-tier headphone/IEM, but I have no faults with regards to instrument separation and the overall size. They blow the Pistons out of the water (I hope they do) and compared to the UE 900, they're a bit more narrow left-right but seem deeper front-back, if that makes sense.

I do understand if a lot of this sound stuff sounds pretty fluffy, but on an overall basis, the FitEars sound pretty damn good. It's got a profile that I think a lot of people would find pleasing, and would work well with basically all genres of music. I'd say they mesh the best with acoustic and jazz which really takes advantage of the good mids and instrument separation, but EDM and pop music is also served well on these due to the good bass.


Quick comparison with Campfire Andromeda:

Ultimately, I ended up replacing the TG334s with the Campfire Andromedas as I enjoyed the more extended treble of the Andromedas more and was able to save some money in the process. The overall level of SQ is still quite close between the two. To be fair, TG334 is a pretty old IEM now nearing 4 years, so it's quite good that it's able to compare so well still to the Andromedas, which are the cream of the universal IEM crop at the moment. Here's how they compare in some key areas. Bolded is where TG334 wins.


= : equal

> : slightly better

>>> : definitively better (to me at least)



Build quality: TG334 >>> Andro (Andro's aluminum scuff easily, like TG334 connectors better than MMCX on Andro)

Cable: Andro > TG334 (Andro's litz cable very soft and pliable, TG334 cable too springy)

Included tips: Andro >>> TG334 (TG334 silicone tips are honestly awful for the price)

Other accessories: Andro > TG334 (TG334 has pelican case, but Andro has a nice leather case and a pin!)



Bass quantity: TG334 >>> Andro

Bass quality: Andro > TG334

Mids quantity: TG334 = Andro

Mids quality: TG334 > Andro (slight edge for TG334 mids, better enjoyed its lushness and holographic nature)

Treble quantity: Andro >>> TG334 (much more extended treble)

Treble quality: Andro > TG334 (extended treble has more detail)

Soundstage: Andro > TG334 (wider presentation, very close though)

Speed: Andro > TG334 (TG334 bit slow in comparison)

Clarity: Andro = TG334 (both have little/no veil in sound)

Detail retrieval: Andro > TG334 (owing to better treble)



Comfort: TG334 >>> Andro (while Andro is comfortable, TG334 is a step above)

Source "pickiness": TG334 > Andro (Andro's high sensitivity means its sound is more variable across sources than TG334 is, both sound quite good out of the latest crop of smartphones though)

After-sales service: Andro > TG334 (FitEar seems like a difficult company to get a hold of, haven't dealt with either company though)



On a scale with all the headphones/IEMs I've owned, I'd probably put them on the same level as the Audeze LCD-2s and close, but a tad behind the HD800s. Probably better than the HD 600/650s, but I haven't heard those in a while and the sound from them, while good, were a tad forgettable from my sources. My second favourite IEMs owned so far after the Andromeda, They remind me a tad of the Westone 3s I've had before regarding the fun-ness sound signature, but with better mids, soundstage and fixing all of the issues I've had on those regarding hiss and fit. If I can find a FitEar with more extended treble, I'd probably switch my Andromeda for the brand again since I prefer the build and finish on FitEars and the overall feeling of quality they bring to the table.
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Headphoneus Supremus
Pros: Transparent + detailed across the frequency spectrum and breath taking mids
Cons: Stock tips do not do justice to this amazing universal IEM
There's not much that haven't been said about this amazing universal IEM so I'll try not to repeat. I bought the TG334 at Fujiya Avic...thanks to AnakChan for his strong recommendation and for going out of his way to bring me there. Out of the box, the TG334 sounds bass enhanced with the stock tips but after experimenting with some tip rolling, I've discovered that the best tips to showcase the quality of the TG334 is the JVC Spiral Dot tips. The Spiral Dot tips actually lift the veil many complained about the TG334. On top of that. the Spiral Dot tips also cut some mid-bass bloat that's very prominent with the stock tips. Now I'm truly enjoying the sound of a very neutral and transparent TG334...which will be the case, if only FitEar realise that the stock tips are not doing their amazing TG334 justice.
Other than the very detailed, intimate and breath taking mids on vocals, TG334 handles percussive transients very well and transient notes have a very fast snap with life like realism on drums, percussion and plucked instruments. Piano timbre and tone is executed with amazing realism, including the ambience of the venue. Soundstage and depth is also very good and convincing yet not unrealistically wide with instruments flying all over the place. Placement of instruments is very accurate. Busy passages are always handled with clear layering without sounding the least congested. To be honest, I'm very surprised how the TG334's sound quality actually stand up to the TOTL CIEMs that I've tested over time. I'm not saying that it's a CIEM killer but it stood up very well and even surpass the performance of some CIEMs at times. I hope my short comments and tips will be able to help new, old and future TG334 owners achieve the best performance out of their TG334. The TG334 is truly an understated performer so if you're planning to get a universal IEM, do yourself a favor and check out this amazing IEM.
PS: You'll need to experiment with the tip size, insertion depth and seal in order to achieve the above results. From my experience, the sweet spot for me is around 2-3mm after the first bend of the ear canal where I get a good seal (YMMV). Do not insert it too deep or the mids will get very nasal and the low frequencies will be drastically cut. I highly recommend that you experiment with the tip size, insertion depth and seal. I'm sure you'll find that sweet spot and I hope that you'll enjoy the sound of the TG334 as much as I do.
Forgot to add that I've been using it with Comply tips which differ from the silicone tips very much.
The treble on the TG334 is smooth and clear and not as peaky as the PFE232, the TG334 makes a perfect IEM for extended listening period. The mids of the TG334 is an outright winner and trumps the PFE232 totally and perhaps one of the best mids I've heard compared to all the IEMs that I've heard, even those that cost more. I've found the mid-bass of the PFE232 far too bloated for my preference, I prefer the TG334 in that area although it's not perfectly flat but it has a more natural sound presentation which excels in vocal material. Please take note, the TG334 is not an IEM that has a perfectly flat frequency response but it's definitely a very musical one that is tuned in a way to produce the sound that moves the listener. I don't think my explanation justify the experience, you must hear the TG334 for yourself to fully experience it. 
PFE232 no doubt has somewhat recessed mids which I tried to resurrect using different filters or some kind of digi eq's but with no big results. Seems the two little BA transducers inside aren't capable to cover alongside the whole fq spectrum, but this is a smart tuned set anyway and the sound is pleasant. The treble isn't that peaky or sibilant to me with the Comply anymore. It's of course bright but I think the both hi and low extensions brings some vibrant vibe to the sound picture. For instance PFE112 with only one transducer owns beautiful lush mids but the sound has no hi and low edges and the overall impression ends in bore. Would be awesome to see the two sets merged into one. Perhaps the TG334 is the solution?  I remember an old IEM UE TripleFi10 with great dynamics and spacial soundstage but the trebles were from behind a heavy curtain. No trebles. I'm affraid the Fitear will be kind of muffled, with no trebles whom you found in Phonak's peaky. I'm also curious about the comfort and generally everyday use. The TG334 is sort of rare and luxury set and not that easy available in EU I think. By the way my regular headphone set reference is an old AKG K401 which I really adore and used to combine it with Graham Slee Voyager with the contour on (fills in greatly the lack of bass + big soundstage, fake or not fake is a matter of taste, but this is another story.)


Sound Science Forum Moderator
Pros: Amazing medium / Great details and layering / Big soundstage / Very good isolation / well made and sturdy
Cons: Price / Sensitivity so high it requires a clean source to keep hissing away / Big for small ears (a few girls had trouble wearing them)
- 3 Pairs of silicone tips
- Cleaning Tool
- Cable Clip
- Pouch
- Box - Pelican1010
- Carabiner

it's a handmade tank!
Everything in the 334 feels of strength, the acrylic shell is thick and makes my jh13 look fragile.
The IEM connectors are almost identical to what you have on a HD650. For me, this is a good choice because it avoids the usual fragile metal pins we get on most customs. I bend these rods on my jh13 regularly and I'm always afraid of the day when one will remain stuck in the IEM.
one pin is bigger than the other so you cannot invert polarity. Most manufacturers don't care if the polarity is inverted on IEMs even without removable cables. Not saying it's very important, but it shows how much Suyama san cared and wished for his product to be perfect.

The cable is too stiff for me, it makes me think of a guitar string surrounded by a heat-shrink tube . Fragile and cheap are two descriptions that will never come to mind when talking about this cable. I still do not know if I should love it or hate it. On one hand, it is a miracle when a cable can survive me a whole year, and it seems on its way to enter my personal Guinness book of cable survival. At the same time the rigidity transmits really too much vibrations for me and the cable clip becomes almost mandatory(not as much as an er4 but with the same idea).
The memory wire is more flexible than what I'm used to. And I welcome that as it guides the wire enough to stop it from jumping from over the ear, yet it's flexible enough to critically reduce strain over my ear. I usually get cables without memory wire or cut it out when I have no choice, but in this case I'm pleased with it and find it to serve its purpose very well.
IMG_3957_DxO.jpg colored dots to avoid the famous "always wrong on first attempt" also known as the "usb trap".
IMG_2784_DxO600.jpg I favor angled jacks for portable use but as a straight one it's very well made and the transparent heat-shrink stuff serves as a great strain relief.
IMG_2840_DxO.jpgTitanium tube to separate trebles from mids and bass. Unlike the F111 and Parterre where the tube ends up in a cone shaped extrusion to enhance the trebles as they only have 1 and 2 driver to deal with the entire range. On the 334 there are 4 drivers in a 3ways so the tube is just a tube and only used to minimize interferences from the other drivers on the trebles.
Here is the Parterre(2drivers, one way) for reference, to show the tube differences.

334 are a bit bulky, so really small ears should look elsewhere. But most of the hull is out of the ear, and I did not find it problematic to use. It took me some time to find the best way to place them:
-Find tips because what's provided wasn't great for me.
-How you'll bend the memory wire really plays an important role for long-term comfort.
But all this is no more than routine for me on universals, so really no significant problem with comfort. I use it every day without pain and can clearly wear them longer than my IE80 or hf5.

Isolation: although it depends on the tips you'll use, it is very good for a universal. Not etymotic level, but clearly on a high level. With some comply foams I felt the isolation was better than on my jh13. Acrylic thickness probably plays a big part here.

Simply my favorite universal out of all those I've tried. Given the price we are entitled to have at least that, but I was really surprised by these IEMs. And I had certainly never imagined they could put my jh13 (no freq phase) in difficulty.
-The mediums are my favorite on any IEM I've heard. Custom or not, both in definition and how natural they sound. I understand very well that signature is a matter of taste, some like the lush laid back mids of a W4 or my fellow IE80, others salivate from listening to the boosted and bright er4 medium. Well the 334 is pretty much in-between with an electrically flat medium-to-trebles signature. When you hear details, it's because of how precise the 334 are, not because there is a +8db on the frequencies of that instrument/voice. And trust me on that one, you'll hear details, loads of them! That's how I love voices, detailed but not forced onto me by some frequency tricks(what annoys me the most with the jh13, voices aren't doing it for me even though it's a stellar CIEM). Even though the mids should be considered slightly recessed, it is the part that really shines. That's how good it is.
-Trebles don't extend very far, like any multi BA driver IEM, but for a multi BA they sound very nice. I'd say that most of it drops after around 10khz as usual, but here you still get a good quantity of lower volume details up to maybe 15khz(take into account that my own ears are not so young and I can't say night from day after 17khz anyway). I find the trebles more natural and clearly more defined than on my jh13(non freqphase). It just doesn't have the extra “air” you can get from a few good fullsize headphones. And as said for the mids, trebles are pretty steady until the point where they drop down(no feeling of steady roll off, it just stops at some point). So most cymbals and other treble oriented sounds end up with a very natural and rich sound. Much more at least than all those IEMs with 1 big spike in the 8 or 10khz and a dead-zone right before and after that frequency. Here the 10khz has enough back up to get a cymbal to sound real, something I'm sadly not used too.
my other favorite cymbals on IEM were from the EM6. too shy on the jh13, too spiky on the EM32, too forward on the Parterre yet a little less detailed. and just harsh or muffled on most IEMs I've heard. I have to say, I can deal with the most distorted bass, but have a hard time being satisfied with trebles on IEMs. 334 isn't perfect in the trebles, but for an IEM it almost is. Again with the em6 the closest to what I like and find "real" on a cymbal.
More than saying that the mids or the trebles are great, I should say that they're so balanced to my ears that no part is masking the others.
-bass go very low and are heavily emphasized in an attempt, I guess, to convey speaker bass feeling. In some ways it works wonders, but it's not perfect and will be too much for some people. The overall feeling is that there is a strong bass presence with round and very wide sub bass. The texture is incredible and the soundstage as big as it gets on a BA driver IEM. But the other effect of those strong sub bass is a feeling that the bass is slower than usual as the 80-100hz impacts merge mostly into the sub bass, taking away part of the "'slam" feeling.
Coming from the jh13 with some of the fastest bass response feeling you'll encounter, it's pretty puzzling.
Coming from some dynamic driver phones with big bass, it's already a lot more usual.
All this to say that depending on your tastes, the bass could be overwhelming and feel “too slow”. For people used to consumer grade headphones and bass lovers, bass quantity should be pretty fine and lovable(same kind of sound, better quality). In case it's too much for you, you can get satisfying results by EQing down the sub bass. You will immediately feel a relief and an increased speed with just 1 or 2db less in the 60hz and lower. Otherwise adding an impedance adapter from 8 to 30ohm can give nice results for the same purpose (8ohm being my personal choice. 30Ohm tended to alter the mediums I love so much so I dismissed using it).
and for the hardcore bass head, boost the 80hz even more to add impact to the already great rumble.
So it's a bassy IEM, no arguing about that. It's the bass phone that doesn't crush the rest. My IE80 has no medium, my hd650 has mids, but slightly recessed/muffled. On the 334 I could say that I wished for a “faster” bass, but never have I though that the bass was detrimental to mids and trebles. I certainly wouldn't recommend using a warm or bass boosted source as it would immediately be too much. But a nice flattish source(with no hiss) is a great experience with those TO GO! 334.
-imaging/soundstage: huge for an IEM, all “To Go!” Have an impressive soundstage/headstage(call it how you like), very wide and textured. The specificity of the 334 comes from the drivers vertically aligned and how the 3 ways are kept vertical until the end. It helps getting some height effect with a frequency dependent positioning.
When listening to a well mastered album it won't really alter the song as we're talking physical separation of a few millimeters compared to the a vertical imaging of 10 or 15centimeters for some songs. But when listening to a song with virtually no imaging cues, the 334 will make some up. Just enough to add some fun to the music. Old punk fans rejoice!
It's a very sensitive IEM, meaning it will make noises from your source to hiss louder than most IEMs. Not the 334's fault as the noises do come from the source. But to fully enjoy the qualities of the 334, I strongly advise you to avoid sources known for hissing.
Worst case scenario: You love your hissing source. Well just add a clean amp, it will solve the hiss-ue and improve the overall sound.
As mentioned before, the source impedance will affect the 334's sound signature a little. And it was, surprisingly or not, a very bad combo with the FIIO X3. Because the output impedance is so low you actually get more bass than on other sources and you end up with a more V shaped signature. Added to the already warm X3, bass becomes overwhelming.
The dx50 is better but hisses enough to annoy really quiet listeners. If you're rich, I recommend the zx1 or anything+ a nice amp. The 334 is a good IEM, don't go cheap on the source now.
That said, if you don't mind the buffering noises, I spent a lot of time pairing the 334 to a clip+ and it was very nice. The 334 makes up a little for the narrow soundstage of the clip+ so the result doesn't suffer any critical flaw and is very enjoyable.
I usually push people to go as close as possible to zero impedance on their source's output, but here a source with 3 to 5ohm might actually please more people. The change in signature is subtle but still audible. And at those levels of sound quality, ultimately the signature will be the judge.
Here's an unrealistic and simple graph showing how your source's impedance will affect the 334. keep in mind that I cut all possible corners in the calculations so the values aren't reality. The purpose is to give directions and proportion for the changes not values at a 0.1db accuracy.
(frequency graph and impedance values for calculations were all stolen shamelessly  from M.R.O. thx to him)
Instruments separation from resolution to image positioning is excellent, you end up with incredible details (dat medium) without resolving to the usual tricks of boosting strategical mid and treble frequencies(like somewhere from 2to5khz and 8to10khz). I personally am not a fan of very spiky boosts so I'm happy with the way the 334 sounds.
The signature is clearly miles away from monitoring(yet pretty close to electrically flat), I see the 334 as a high quality, fun sounding IEM dedicated to enjoyment.
In the same brand the f111 was closer to the so called neutral signature(er4 style). But doesn't extend as much in the bass and clearly doesn't have the same level of details. The Parterre has more treble boost and a great imaging in my opinion(the best of those 3), but still I found the 334 to have, if not more details, more natural trebles. It's weird for the "bassier" IEM to impress me most in the trebles but that's how it was.
The price is no joke. My ears would tell people to go custom for this price. My wallet on the other hand would explain that a 334 can be sold with very little loss. When trying to sell customs is a different story (if the custom can actually be reshelled, else you've lost it all). So there is no wrong choice, but surely a hard one to make.
Hi! Liked your review... Since I have IE80 too and I'm searching for some upgrade.. could you give me a brief comparison between the two? Thanks!
outside of having too much bass, they have really little in common. the mids are recessed, but not as much as the IE80. in fact many people really love the voices on the 334. and going up in frequency the 334 sounded more stable than the IE80(but this also changes with tips on the IE80).
I would be tempted to see a few similarities with something like a SE535(or 530 if you have heard them). still clearly different beasts, but you recognize that kind of medium, that's too calm compared to an er4, but still retains a pretty natural sounding and doesn't yet feel veiled.
the IE80 is really weak in the mids, even with the tape mod it still felt below in mid's presence in the music.


Headphoneus Supremus
Pros: see above
Cons: Large shell, works back out periodically, ummmm.... very *ahem* cost prohibitive
**Fitear To Go 334**
It's very expensive, it doesn't fit the best due to its huge shell, yet I love it all the same. The sound is sublime.
Normally I prefer dynamic IEMs for their weighty low end and texture that most BA earphones can't touch, but the tonal quality, transparency, and high level of detail retrieval bring the Fitear to the top of my list. The openness and clarity are really something else for IEMs. They're *almost* as spacious and enjoyable as my modded T50RP orthos. 
Bass:  Very good depth and texture, having a punchier tautness than most dynamics I've heard, but doesn't quite have that ultimate slam and extension. However one small tick on an EQ or bass adjust nicely adds weight, and even when listening rather spiritedly I've never once heard a driver clipping which has happened with every other BA I've owned.
Midrange:  Stunning, detailed, layered, full and lifelike. I've never heard any earphone (BA or dynamic) with the natural richness these have. I feel this is the biggest strength of the Fitear. 
Treble:  The top end has awesome tactile feel, with cymbals having a true palpability and shimmer. However the utmost extension has been noted by others as not quite the best. Personally I don't find anything at all lacking as all my music collection sounds completely natural with no aspect shorted in the least. I do note that my MK2 GR07s give the impression of a touch more extension and shimmer, but I wonder if it's possibly at the expense of being slightly artificially boosted. Hard to say.
Soundstage:  Or 'headstage' shall we say... It's definitely sizable for an IEM (some owners have said they feel it's bit intimate rather than super-wide). So perhaps not the last word in ultimate width, but I've never heard spatial cues and instrument placement done so well in any IEM. That aspect is quite amazing, and it's far and away more 3D feeling than any other I've heard. 
Overall, these aspects combine to give an earphone which is a marvel of sonic richness and scale. I absolutely love late night listening sessions with these, and I think it'll take a huge leap in earphone tech to overtake them. 
Recently I picked up an ALO silver cable for them second-hand, and am glad I did. To my ears it seems to open up the space a bit more even, and offer a touch more clarity. Very nice addition to the sound....
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could you rate it according to the price too and compare to other iems of similar type?
I did give it a 3.5 on value, since it's so pricey. It certainly takes no prizes in value.
Compared to other earphones I have, well, there's no comparison really. The sound is much more headphone-like than any other IEM I have. Spaciousness (by that I mean instrument location within a sense of 3D area), clarity, and tonality are in a whole league above anything else I have, including: MG6Pro customs (the resolution/clarity/space difference to these customs is just laughable), GR07 Mk2 (these give the second most enjoyable listening experience after the TG!334), IE8 (sounds congested, murky, still somewhat wide soundstage but it's very one-dimensional by comparison), etc.... I really don't have very much around still in terms of other IEMs for comparison.
Aero Dynamik
Aero Dynamik
Would you consider auditioning the AKG K3003 and compare it to the FitEar TO GO! 334? I've heard the K3003 and loved it, but would really like to hear the 334 before I pull the trigger. However, there seems to be no way to audition the 334 unless you live in Tokyo, or at least in Japan. Thanks!


1000+ Head-Fier
big soundstage. very lush mids and life like