GR07, Vsonic's statement in the IEM world. Featuring a Sony-licensed 11mm bio-cellulose driver, it was unlike anything out in the market. IEM's have come and gone, upon release many get hyped and overrated, but loose their sparkle over time. GR07 has proven to be able to withstand time, because it is simply a great product. At this time, despite the VC1000, GR07 is still considered the flagship product and has been mentioned to be the most proud achievement by Vsonic's CEO [interview linked on the bottom]. Time has passed and after the first GR07, a Mark II was released but then discontinued for the now GR07 Classic and GR07 Bass Editions. Both of which have the lower prices at 100$ and 130$ respectively, whereas the other models were about 180$. Here I'll be looking into both of the latest iterations of the GR07 and how they stand in today's competitive market. To note, the GR07 Bass Edition is about 30$ more than the Classic Edition as mentioned, I'll get into whether the price difference is worth the added cost. 
 
  Packaging is done quite well and it is presented quite nicely. Though to note, the previous packaging of the first iteration of the GR07 was quite nicer, but no big issue here. For tips, you get the Vsonic exclusive "Sony Hybrid" style tips of different colors, though these have wider bore than the Sonys. A set of single flanges, a double flange pair and a pair of foam tips. Then you get ear-guides and a soft pouch. Unluckily, there's another downgrade here as the first GR07 was packaged with a hard clam-shelled case, much nicer than the current pouch. I personally didn't have any luck with these ear-guides as I found them to be uncomfortable and slid off the cable too easily. Overall, I think you get a good array of extras here and packaging is done well.
 
 
 
  For the Classic Edition you get three color choices as shown below with a gray cable, while the Bass Edition only comes in black with a gray/red cable . The housings are plastic but feel quite sturdy and you get a metal nozzle that is adjustable. This is currently exclusive to Vsonic [Though Vivo XE800 borrowed this from Vsonic] and makes fit a bit easier for the user, an innovation from Vsonic that makes this IEM more "special".  It is definitely something very clever, that simply works. I find the cable great on these, it's sturdy and quite ergonomic. Strain reliefs on the plug are done well as is the y-split. Problem lies in the strain relief on the housing, according to a user here, the Vsonics aren't protected by a tangle inside of the shell [as is done on a lot of IEMs]. So if the housing is held in place and the cable is pulled too hard, it may just disconnect inside the housing more easily than expected. I recommend treating this area with care and taking them off your ears from the housing. Overall, build quality is solid but there are some competitors providing removable cables at a similar price. Of course, they also won't give you the great sound these Vsonics possess.  I would handle these with some care, though it is tough in some respects. To note, the cable does tend to get green with time due to oxidation. 
 
 
 
 
 
 
 
 
  These can only practically be worn over-the-ear, so that's something to note. Because their 6k peak in the treble does decrease with a deeper fit [more on this later], I wear them in that deep manner and while it is comfortable for the most part, there is some ear fatigue, though the fact that they're small and lightweight helps a lot. I use Phonak single flanges, but the stock hybrid style tips, Sony Hybrids and MH1 tips in small all worked for me as long as I got a deep fit. For a foam option, I recommend Comply T200. 
 
Isolation is solid on these but don't expect it to isolate like a fully sealed IEM. While the ER4 isolates -43db, the GR07 isolates about 24-28db in my experience. 
 
 
 
    These are meant to be a studio monitor and by their signature it shows. I find it to be generally flat, with a mild bass boost accompanied by a midhigh spike and higher treble that is well extended but a bit laid back. InnerFidelity's graph, shows a well matched IEM between channels, with low distortion, portraying a quality driver in these. Efficiency on these is solid, expect it to get loud enough on quiet recordings from your portable player for the most part. On a very quiet old classic song I have, I do wish these would get a bit louder from my iPhone, but generally, volume should be no issue. I found these to sound best with tips that have a bore size that's about the same as nozzle's opening. If the opening of the tip is too large, expect the treble spikes to get bigger due to a horn effect.  
 
[setup: Deep Fit>Phonak Single Flange tips or Sony Hybrid tips in small>iPhone6
 
bass: This is where the difference between the Classic Edition and Bass Edition lies. When I first heard Vsonic were releasing a "Bass Edition" of the GR07, I wasn't all that interested. I found the bass balance to be adequate and was expecting them to boost the bass to levels to where the midrange will affected as it's usually the case. What actually occurred, was a very subtle boost in the subbass, midbass stays about the same. The boost is gradual from about 80hz all the way down [graph shown below]. I always found the GR07 to lack a bit of subbass, this Bass Edition remedies that and tastefully so. Upon comparing the two, I now understand the 30$ difference between the two. The Bass Edition is simply the definitive edition of the GR07. That's not to say, there's a huge difference, get to the other regions and the two editions are identical and as mentioned, the subbass boost is small. Those who want to experience the sound of the GR07 for the lowest price possible, opt for the Classic Edition, those wanting the best the GR07 can offer, should spend a little more for the Bass Edition. 
 
midrange: Midrange is nice and detailed here with a small hint of warmth. It is well represented and a little laid back. I'll say for the most part, these regions are done tastefully so. Midrange is neither too far back in the mix or too forward. 
 
treble: Here lies my main criticism of the GR07. Get to 6k and there's an apparent spike, insert the IEM too shallow another spike is at 8.5k. I was able to tame the 8.5k spike with a deep fit, but the 6k spike remains apparent despite of this, though also tamed a bit. The treble is bit grainy as it kind of dips between it's spikes. Treble extension is good, but could use a wee bit more air. Despite the spikes, the treble isn't that offensive with a deep fit, it's apparent, but never becomes really abrasive whereas an IEM like the Sony MDR-EX1000 can be. The treble does carry good presence and maintains the relatively flat response quite well for the most part. 
 
The GR07CE/BE aren't necessarily spacious, they have a more laid back, subtle sound, with only some soundstage width. The driver is fast and does image instruments fairly well, but I found it to fall short compared to certain BA IEMs. GR07BE has great extension at both ends, though I would have liked a slightly more extended treble, for a more airy sound. Overall, it's timbre is nice, though I found it to lack a bit of definition with higher pitched instruments. 
 
Below comparisons are done with GR07BE. 
 
Ostry KC06 Comparison: The bass edition of the GR07 portrays quite realistic sub-bass, a bit less in quantity compared to a modded KC06, with more realistic sub-bass compared to a stock KC06. The midbass levels are similar, with the GR07BE having a bit more bass control, with the KC06 having a little more warmth, midbass to lower midrange. The 1-2k region sounds a bit more refined on the GR07, overall the higher midrange sound similar between the two, with the GR07BE being a wee bit more refined. Get to the overall treble and the GR07BE has two apparent peaks, one at 6k and another at 8.5k. KC06 has peaks at 8.5 and 10k. I found the GR07BE to be peakier overall, with a deep fit and Sony-Hybrid tips I was able to tame the 8.5k peak but the 6k peak remains quite present. With the Comply S200, KC06's 8.5k peak is tamed and the 10k peak became minor. The KC06 has better treble extension, sounding more airy and open in these high frequencies, though a bit splashier than the GR07's treble despite being less sibilant. Overall, the KC06 simply sounds a bit more refined in the high regions with a smoother, more extended treble. Soundstage depth sounds a bit better on the GR07BE, but the KC06 is wider and more airy. To note, the KC06 also sounds more dynamic, overall it's a more engaging sound while being about just as balanced. On the contrast, there is some finesse on the GR07, the KC06 lacks, it's more subtle but a bit more refined. Hard to pick a winner here, the GR07BE's bass and lower midrange sounds more mature, while the KC06 sounds better in the higher midrange and treble. 
 
Hifiman RE400 Comparison: I couldn't necessarily do a direct comparison here, but I'll just make it subtle based on what I remember of these. The GR07BE has similar bass levels with a more realistic subbass, similar midrange clarity and a more balanced, extended treble albeit more prone to sibilance. Both are meant to have a more studio-monitor sound, but I feel the GR07BE is a tad better in it's role with a bit more balance and bandwidth, extending better at both ends. What I will give the RE400 is a smoother, less fatiguing treble, but it's a bit subdued for my taste. Outside of sound, both are really comfortable, but the GR07's cable feels far more durable. 
 
T-Peos Altone 200 Comparison: Here the Altone gives a more present bass. Problem is, I found the GR07BE more extended and controlled, whereas the Altone has a bigger midbass hump and a sub-bass roll-off. The Altone as a result has a looser more punchy bass, GR07BE has more rumble and control, more subtle but more filled bass. The midrange is warmer on the Altone in the lower mdrange, details here are less apparent. Get to the higher midrange, the Altone is very forward, to the point of being a fault. While this makes certain details more apparent, it simply sounds unnatural and edgy with higher pitched instruments. 3-6k is where the problem lies on the Altone, creating the mentioned effects. Treble is also peaky as well, though with Comply TS400, I was able to tame the peaks here. Both GR07BE and the Altone are mildly sibilant, the difference is that the Altone has this edginess to it's sound that's quite apparent. I was able to make the Altone more balanced with a 15ohm resistor, making them much smoother  but, doing this also made the lack of the treble extension more apparent. Simply put, the GR07 sounds a bit airier and open due to better treble extension, though the difference isn't huge by any means. Despite of this, Altone does place instruments a bit better than the GR07. Overall, the Altone comes off as this extravagant IEM, that simply wants attention. It's bass has a lot of punch and it's midrange and treble are detailed, but too forward for it's own good.  GR07BE on the other hand, is more laid back, but also more mature, as most of the frequencies are done at about right quantities, despite it's flaws here and there. I'll give the nod to the GR07BE, here proving it can compete and surpass IEMs above it's price. 
 
Dunu DN1000 Comparison:Here the Dunu carries more weight as it's bass it's more filled in the sub-bass. A friend of mine here mentioned that he found the DN1000's bass as slower, I agree to some extent but it's subtle, but can see where he's coming from. The bass of the DN1000 hits harder overall, so it appear to linger more, there's more reverb here. The bass of the GR07BE is a bit more neutral, but I found the DN1000's more subbass oriented bass more euphoric. The midrange of the DN1000 has a bit more warmth and it's also a bit more forward, compared to the more laid back GR07BE. In the treble the DN1000 does have a big peak that extends from 7-10k, so it can be as sibilant as the GR07BE. But these peaks can be tamed a lot more, than the GR07's. This means it's more finicky with tips, but the potential is there. After finding the best tip/insertion depth combination for both, the DN1000 simply sounded more defined in the higher frequencies. Mild sibilance due to it's 10k peak on DN1000, but the GR07BE was more offensive and yet a bit more subdued in certain regions in the high frequencies. Treble extension is better on the Dunu, so it sounds more airy and spacious While some may find the GR07BE's bass balance to be preferred, I found the DN1000 to be more rounded in the midrange and highs, with a more spacious soundstage with better instrument placement. While the GR07BE bested the previous hybrid, I would have to give it to Dunu here, though it is about 55-70$ more expensive. Outside of sound, the GR07 is much more comfortable, with smaller, lighter housings, compared to the bulky and heavy Dunu DN1000. 
 
 
Here I show how the GR07 Bass and Classic Editions will graph using the latest Olive-Welti in-room compensation. I superimposed InnerFidelity's data for this result and did some averaging in addition to sine sweeps. It is not meant to be 100% accurate. Things change with insertion depth, though all in all I feel this portrays the overall tonality quite well. I found this data useful for EQing as well, though the 10 peak is lowered to 8.5k with a more shallow fit based on tone sweeps I did for these. 
 
For under 150$, no other IEM plays the intended role of a studio montior of the GR07 [BE&CE] as well as these. They give that monitor sound, with a great comfort and isolation. I have my criticism in it's build quality and sound to some extent. With some cable failures being reported once in a while and the treble peaks, but regardless of this, I have great respect for this product.  I just recommend to treat them with some care and insert them as deeply as you can with comfort. Time has passed, IEMs have come and go, being hyped and then disappearing, but these are still being recommended, and for good reason....
 
I would like to thank user UnityisPower for loaning me the GR07 BE!!
 
notable links
Vsonic Company Tour [must be translated]
InnerFidelity Graph for Bass Edition
InnerFidelity Graph for Classic Edition
GR07 MKII analysis by Rin [should apply to current models for the most part]
Vsonic GR07 Head-fi Thread

 
This is an IEM that caught Head-fi by storm. Featuring a single 10mm high-bandwidth dynamic, using two patented technologies, Ostry made quite the statement. A company that was otherwise unknown before, actually had quite the experience in creating drivers [over 20 years!], likely for other companies as an OEM. They finally decided to release their own products and while I don't necessarily know the patents involved, I have read that the driver in these carry principles from a moving-iron transducer. This IEM leads the way at it's 60-65$ price, sounding better than anything below it's price range, while competing with stuff that's more than twice it's price. In addition, it hits all the marks, in construction, isolation [average but solid] and comfort, leaving little to fault. It is quite the package and an IEM to be still be recommended for quite some time!
 
  Packaging is quite nice, with a great presentation. The KC06 comes with quite the array of tips which are organized with white plastic small boxes [pictured below]. Standard single flanges, wide bore [tip opening] red single flanges (which are identical to those of  the TTPOD T1E), small bore single flanges and gray small bore single flange tips. In addition, you get a pouch, shirt clip and ear-guides. The KC06 is well accessorized, though I would have preferred a small hard case, better ear-guides and shirt clips. Personally, I've had no luck with ear-guides as they tend to slide off while in use and just become unpractical, these are just generic and don't have anything to prevent that. The shirt-clip is a generic one I find in many other IEMs and this type of shirt clip, simply doesn't hold the cable well, so it's rather cumbersome. Overall, nothing to fault here though, you get plenty of accessories, Ostry didn't skimp the consumer here.
 
 
 
  First off, the shell is made of metal and is titanium plated, so quite scratch resistant! Unlike other metal shells this one feels very light, making it not only aesthetically pleasing, but also quite practical. The housing is gorgeous and puts those of the higher priced Vsonic GR07 to shame. The only drawback is that the back of the housings, with the logo, is prone to scratching as it isn't plated, but it should be quite minimal for the most part. The housings have proper strain reliefs, but I do wish the jack had a better, longer strain relief. I would handle the jack with care, only unplugging from the jack's shell.  Y split isn't protected very well either, but I don't expect much failure here due to the cable's thickness. Cable is protected with TPU, giving it a soft slippery feel, but it's not very supple. There is some cable noise but wearing them over the ear or using a shirt clip rids of that. I do have some issues with the cable tangling and sometimes being hard to manage though. Another complaint is the lack of a chin slider, so finding a way to make your own may be necessary. I've had luck using a thin layer of tape. Nozzle is protected with a metal mesh that is quite sturdy, but be sure to check it once in a while for debris. Overall, the KC06 feels well built and aesthetically pleasing, looking like an IEM that is worth much more, the cable is the only slight drawback here. 
 
 
  The housings of the KC06 are quite small, light and it's nozzle is the diameter of smaller IEMs like the Sony MH1/Tenore. This and the fact that it be worn both straight down or over-the-ear [shown below] makes it quite versatile. I can wear these for hours with no discomfort, using Comply T200 or S200. Heck, I'll say, it's one of the most comfortable IEMs I've used to date! These things simply disappear in your ears despite the metal shell. One of the main factors for their comfort is that all you need is a shallow fit, no need to dig them deeper. 
 
Isolation is average but quite sufficient for commuting in my experience. The use of foam tips helps it isolate, but don't expect it to isolate like a fully sealed IEM. While the ER4 isolates -43db of outside noise, the KC06 isolates about 15-20db. 
 
 
 
 
  The signature characteristic of the KC06 is quite hard to pinpoint. I will say it's generally flat, with perhaps a small tendency of being u-shaped, emphasis on the higher treble and midbass. I can confirm this based on InnerFidelity's graph results. To note, the KC06 proves to have a high quality driver, by graphing with very low distortion, in addition to being well-matched between channels. A shocking feature of the IEM is how sensitive the driver is, it is very, very efficient! This is unlike most dynamic drivers and more like a balanced armature driver IEM. This makes it quite dynamic even with your smartphone or portable player and you won't have any problems with quiet recordings, it can get loud! I have a feeling this has something to do with one it's patents, it is quite nice to have and gives it quite the advantage over many inefficient IEMs like the Zero Audio Tenore, in terms of dynamics. Matter of fact, of all the IEMs InnerFidelity measured, I found only the Dunu DN2000 and Shure SE535 to be more efficient, and those use multi balanced armature drivers. To note, because of their high sensitivity, they may hiss with players that are noisy. 
 
bass: This is the more subtle portion of it's sound. The midbass is elevated above neutral, but very minimally perhaps 2-3db at most and actually rolls off, starting at about 100hz. The bass is clean, quick, punchy and stays out of the way of the midrange very well, I've only heard similar bass control coming from the likes of Hifiman RE400 or the discontinued Sony EX600. The issue lies in the subbass, the bass simply lacks rumble and authority, those wanting realistic bass thump, will simply be missing it here. In this regard it is also quite like the Hifiman RE400, with about -4db below neutral at 20hz. 
 
midrange: Midrange is surprisingly reminiscent of the Hifiman RE400. There is a slight bump in the 1-2k region, giving a very small emphasis to higher pitched instruments. Higher in the midrange, the 4-5k region is a bit subdued, making it lack some crunch and bite with higher pitched instruments, but it also prevents it from getting sibilant. \
 
treble: Here you will find two peaks, one at 7k and another at 10k. Luckily, I found neither to be too extreme, but this where tips play a role. Wide bore or short tips, will accentuate these peaks, making it a bit edgy and sibilant. I chose, Comply T200/S200, whose length helps tame those peaks quite well. I also had luck with Meele M6 biflanges. 
 
Soundstage is quite big and airy, this and it's dynamic nature gives it a very engaging sound. In addition, placement of instruments is done very well, only high-end hybrid or Balanced Armature IEMs will have noticeably better placement.  Bandwidth is only held back by it's slight lack of bass extension but there's a remedy for that.............
 
Bass Vent Mod: As shown below, the Ostry KC06 has two vents, which can be covered with tape. Covering the top vent [vent pictured on the bottom] reduces bass, but also creates a peak at around 2k, so covering this vent is not recommended. Covering nozzle vent [vent pictured on the top] on the other hand, boosts subbass, with  a gradual rise starting at 250-300hz. Cover the vent completely and you get a slamming subbass, bassheads rejoice! Issue is that the bass does mask a bit of lower midrange detail so for those wanting more clarity theres an alternative. Simply cover the nozzle vent, but then poke a hole with needle or pin. This will reduce the subbass boost to about half of fully sealed and while I still find it to be a bit boosted above neutral, simply use  S200 and you get a fairly well controlled bass with proper subbass, so I use this configuration. Some may live with the KC06's  stock bass roll-off just fine and may not want a sub-bass boost as it makes it linger a bit more, I personally like the boost with the addition of foam tips as it expands it's range. Graph below the comparisons displays what I perceive the KC06 to sound like stock and modded, in comparison to the Hifiman RE400/RE600 which have a similar sound signature [yes it's a simple microsoft paint line on top of Rin's graph lol]
 
 
 
[Setup: Shallow fit, Comply S200, vent pinhole>iPhone6]
 
Hifiman RE400 Comparison: Starting with the bass, the modded KC06 simply sounds more filled out in the bass, due to more subbass, while having similar midbass levels. I do find the bass of the RE400 a bit tighter, even compared to a non-modded KC06. Bass characteristics are quite similar when the KC06 is not bass modded as they both roll-off in the subbass, with the KC06 having more upper subbass but rolling off more than the RE400 in the deeper bass.  Midrange is surprisingly very similar between these two in terms of tonality, vocals are presented in a similar fashion throughout the range, which is quite surprising. There is a hint more warmth on the KC06, while the RE400 sounds a tiny bit clearer, but the difference is subtle. Upper midrange they are both a bit laid back in upper midrange energy and get very similar throughout. Get to the treble and the RE400 is a bit soft, subdued and rolled off, KC06 on the other hand has better energy and extension. The KC06 sounds airier and detailed in the higher ranges, making the RE400 sound a bit more closed in, in comparison. Both are quick and snappy throughout the range, but the bigger soundstage and added bass and treble extension give the Ostry a more euphoric feel. Both are very close in performance, but I'll give the slight edge to the Ostry. 
 
Vsonic GR07 Bass Edition Comparison: The bass edition of the GR07 portrays quite realistic sub-bass, a bit less in quantity compared to a modded KC06, with more realistic sub-bass compared to a stock KC06. The midbass levels are similar, with the GR07BE having a bit more bass control, with the KC06 having a little more warmth, midbass to lower midrange. 1-2k region sounds a bit more refined on the GR07, overall the higher midrange sound similar between the two, with the GR07BE being a wee bit more refined. Get to the overall treble and the GR07BE has two apparent peaks, one at 6k and another at 8.5k. KC06 has peaks at 8.5 and 10k. I found the GR07BE to be peakier overall, with a deep fit and Sony-Hybrid tips I was able to tame the 8.5k peak but the 6k peak remains quite present. With the Comply S200, KC06's 8.5k peak is tamed and the 10k peak became minor. The KC06 has better treble extension, sounding more airy and open in these high frequencies, though a bit splashier than the GR07's treble despite being less sibilant. Overall, the KC06 simply sounds a bit more refined in the high regions with a smoother, more extended treble. Soundstage depth sounds a bit better on the GR07BE, but the KC06 is wider and more airy. To note, the KC06 also sounds more dynamic, overall it's a more engaging sound while being about just as balanced. Hard to pick a winner here, the GR07BE's bass and lower midrange sounds a bit more refined, while the KC06 sounds better in the higher midrange and treble. 
 
Dunu DN1000 Comparison: Here comes an IEM that gets closest in sub-bass quantity compared to a modded KC06. The modded KC06 still has a bit more sub-bass, but the difference is about 2db at most. The DN1K is a bit  tighter in the bass, but both have good sub-bass thump. Midrange warmth is similar overall but the DN1K's midrange is a bit more forward and clearer, guitar accompanies, were more apparently detailed . With the wrong tips DN1K has a quite the big peak that ranges from 7-10k [typical of TWFK BA drivers]. Using Comply TSX400, the DN1K's peak range becomes narrowly placed at 10k and is tamed. KC06's treble is splashier than the DN1K's which is more mature and refined. Both have similar airyness and soundstage width, though the DN1000 carries a bit more depth. DN1000 also places instruments a bit better than the KC06, though it's relatively close. In the end, the DN1000 sounds like a more mature, refined KC06, but the latter makes quite a battle against an IEM that is more than twice it's price. 
 
Ostry KC06A Comparison: KC06A said to be an improvement than previous iteration, but it just didn't live to my expectations and here's why. Where I found most improvement was the bass, not only was the midbass a bit more refined, the sub-bass was finally present compared to a stock KC06, though to my taste, I still would have preferred a bit more. Midrange is very similar between the two though the KC06A is a bit more clearer in the lower midrange, so male vocals sound cleaner and crisper. Trouble lies once you get higher up the frequencies. I found that the treble peaks of the KC06 were accentuated on the KC06A, resulting in quite an abrasive midhigh region and treble. I used all the tips that I could but to no avail, refinement up top was lost, though I did enjoy the added treble extension. Simply put, the KC06 will overshadow the KC06A for me with it's more subtle treble and tune-able bass. To note, the vent mods didn't quite work on the KC06A, though I was happy with the bass for the most part. Below is a graph between the two I found on a Chinese site, where the engineer was interviewed. Red is KC06A, Blue is KC06, measurements here are raw, so they are not as how the ear perceives it, but it's helpful is showing the difference between the two. 
                                                                                   
 
  Below is a graph of the KC06 as I perceive it, in addition to the effects of the nozzle mod. To note, the 7k peak here is actually situated at 7.5k in my case and 9.5k is actually 10k for me. These are approximate super-impositions from the InnerFidelity graph with added perception results of my ear, not meant to be 100% accurate but gives a good idea as where they stand. 
 
Below is the current EQ I use on the KC06, using Equalizer on iOS. -4db at 100hz with q=.5, +2db at 4k with q=1, -3db at 8k with q=3]. This is with pinhole modded KC06. I find the KC06 to EQ very well!
 
I am currently on a very tight budget and have just been using these, but have not regretted it one bit and neither have I been tempted by anything in it's price range. That goes to show you, how well this IEM fares for me. Ostry have a winner here, I find the isolation adequate, it's very comfortable, well built and sound is great. Even though the KC06A didn't quite do it for me, I am very curious as to what Ostry have in store in the future!
 
notable links
KC06 Thread
Inner Fidelity Graph
Ostry Website

 While some may recommend  budget $20 IEMs like Xiaomi Pistons or the 8$ Monoprice 9927, I have found 30-40$ to be the sweetspot if wanting to spend little as cash possible for something good.  Such price gets you an IEM like this one, which not only has a great sound for it's price, it is well rounded in construction, ergonomics and isolation. In this price range, the only other IEMs I could think of that are on par in sound, are Sony MH1, SteelSeries Flux IE and ZA Tenore [this price range also seems to the home of the microdrivers]. But it's all about the whole package here, as the T1E are better constructed than all the IEMs just mentioned, while having good isolation and ergonomics to boot. With the introduction of these IEMs, TTPOD garnered quite the attention here at Head-fi and for good reasons. 

 
 
 
 
   First off the  housing has this transparent design [even the black ones pictures below], which gives it quite the aesthetic appeal [in 5 different colors!] and the cable is solidly built. The housings are made of plastic, which makes it look cheap in comparison to the similarity priced Zero Audio Tenore, though housing still feels solid and wields a much better than the mentioned. While it may be somewhat stiff and carries memory, it's cable feels far more duable than most cables in this price range. Nozzle has a metal mesh which is well built and has two metal bolts on the back of it's housing, which add to it's looks [though both apparent vents are apparently closed]. Strain reliefs on the cable look underwhelming but luckily the cable should hold up well. To note, the plug is quite big, but should still do well for phone cases as it's design makes up for it's size, with a aiding cap right above the jack. To note, the cable is actually 6N silver plated copper, a configuration only found in much pricier IEMs like the GR07. All in all, the T1E built pretty well for it's price range, IEMs like the Tenore and Flux In-Ear aren't as impressive with their fragile cables. 
 
    While this IEM may resemble the much higher-priced Sennheiser IE800, it's housing is actually almost twice it's size. The housing on this IEM is quite big and it's nozzle is short. Therefore, expect a shallow fit this IEM, which does allow it to be comfortable despite it's size, but will also make it insecure in the ear if a good seal isn't achieved. Because of it's design, wearing them over the ear just isn't as practical, though luckily the included shirt clip is quite helpful in eliminating cable noise when worn straight down. I personally didn't have any luck with the included tips and opted for Comply TSX400 which have a mesh inside the tip, taming the midhighs a bit. A thing to note is that this IEM sticks out a very good amount outside of the ear due to big housings and shallow fit, definitely not one to be worn when laying on your side. 
 
Isolation is a big above average. While it may appear to have ports in the back, the housing is actually all closed, though what limits it's isolation is it's shallow fit. If the reference, Etymotic ER4 isolates about -43db [IF graph result], the T1E is at -25to-30db. Overall, I find it's isolation practical for commuting, though I'll want a bit more if I were somewhere really noisy. 
 
 
    I've heard some describe these as v-shaped in sound, but I found them quite a bit midrange forward. The bass while punchy never exerts authority and it's treble has quite the sparkle, but the focus is a bit on the lower midrange and accentuated midhighs. To note, TTPOD makes quite the claims in configuration, with a German bio-membrane diaphragm and less than 1db difference between channels, i hope the channel matching can be confirmed with future measurements. Efficiency on this IEM is quite good, I found it to get loud enough on my iPhone even on quiet recordings, more efficient than the likes of Sony MH1, Zero Audio Tenore and Flux In-Ear. I chose to use Comply TSX400 because it tames it's midhighs and keeps it's treble extension quite well, Comply S200's taming of bass didn't work well for this IEM as it's bass is midbass oriented. 
 
[Listening set up: Shallow fit, Comply TSX400>iPhone 6]
 
bass: While it's bass may be "enhanced", I found it to be much less in quantity than I expected. I actually found it to lack a bit of subbass, missing some rumble in the low end. But it's midbass was indeed quite enhanced over a neutral response, but far less than a bass bloated IEM such as the Xiaomi Pistons. Perhaps about 4-6db above neutral in it's midbass at 150 with a gentle roll-off starting at about 90hz. Overall, the bass on the T1E is quite punchy and full energy and controlled, but doesn't quite the rumble of some IEMs with similar or less midbass. 
 
midrange: I actually found the range quite in your face here. I suspect, these are well tuned in the most important 3k region, giving the midrange the presence needed.  Lower midrange does have a tint of warmth due to it's midbass but at the same time the sound can sound a bit nasal due to enhanced higher mids in the 1-2k regions. I found this combination did make for quite the midrange, as it can sound quite in your face at times. Luckily, the midrange is quite detailed and clear despite these criticisms. 
 
treble: Here, the lower treble [5k region] is  a bit accentuated.  I personally did find it a bit sibilant at times, but was remedied by tip rolling. I used Comply TSX400 which have a damper inside which help tame the midhighs. The stock wide bore tips were too sibilant for my taste, so I slightly preferred the stock tips with the smaller opening. Higher treble is much softer in comparison, but does have a good amount of energy and sparkle for cymbals, though it does start to roll off past 10k, thus lacking some air in the very high regions. 
 
Zero Audio Tenore Comparison: Here I'm comparing the T1E to what I consider, the best sounding IEM in it's price range bar-none. Bass on the Tenore has a similar punch but carries more weight, sounding a  bit more natural in comparison, though requires tips like the Comply S200 to sound more refined as the foam tames the bass. T1E sounds softer but it's midbass has more punch, but it also warms up the lower midrange a bit more, though it's clearer when the Tenore uses silicone tips. midrange is more forward on the T1E though not by much. Midrange placement is more natural on the Tenore, as the T1E can sound a bit nasal/honky at times. Higher mids are more forward on the T1E which makes it more prone to sibilance and it lacks the air and treble extension of the Tenore. On the other hand, the treble also has more sparkle and energy making it a bit more engaging. Soundstage is wider on the Tenore but the T1E's intimacy can be preferred at times. While it may seem like the Tenores pull ahead, I'll say overall, the T1E just doesn't do anything terribly wrong in comparison and stays on par for the most part. While I give the slight nod to the Tenore in every aspect, the T1E isn't too far behind and it's an overall better package due to better build, it's cable won't give out nearly as quickly as the Tenores...
 
Xiaomi Pistons 2.0 Comparison: Here the Pistons just give out too much bass in comparison. Both the subbass an midbass are enhanced a bit much in comparison to the T1E, making it muddier and less clear. The midrange is more forward on the T1E but the slightly more laid back Piston mirange sounds a bit more natural here, but it also sounds less clear due to the muffled lower midrange. The midhighs and treble are surprisingly quite similar, but I found the Pistons to be  more prone to sibilance with more grain throughout the higher frequencies. Both roll off past 10k and lack some air. While the Pistons had a wider soundstage the placement of instruments was much clearer on the T1E. Overall, the T1E simply wins, it's bass is much more in-line with the rest of the frequencies and the higher frequencies are more refined. To boot, it has better build, isolation and comfort, so I don't see the point of spending less for the Pistons, the 10-15$ price increase for the T1E is a far better investment. 
 
Generally I like to listen to this IEM at moderate or lower volumes, this is an IEM that gets a bit shouty and fuzzy at higher volume levels, luckily you can listen to it loud enough for it to be fun. This IEM has an intimate soundstage, don't expect anything grand, but imaging and depth are good. While it may not go very low or very high in the extremities of audio, this IEM has quite the energy in between. Regardless, this criticism is compared to full range dynamics, the T1E still has better bandwidth than any other single Balanced Armature I've heard to date, which includes the likes of the Etymotic ER4. With a sound that's clear, coherent and engaging, it's easy to recommend, specially for it's price. 
 

Here is my apparent perception of the T1E's response. To note, the peaks here can be located elsewhere past 7k, due to difference in insertion depth. As you can see, while there is quite the bass hump, because it is located in the upper subbass, this IEM remains quite clear. I find that there is some low sub-bass missing but it's not too bad. There is a 3k peak which makes things quite crunchy, but also a bit edgy. Also to note is that the latter two peaks are tamed with tips quite well, but the 3k peak seemed to remain for me. Treble rolls off past 10k, so it lacks some air. 
 
[ When I EQ this IEM I place a 3-4 db drop at 200hz with 1Q and decrease the 3k region to about -3db with a 4Q, -2db at 10k with a 1Q. I use Equalizer in iOS]
 
notable links:
official site
ttpod head-fi thread
purchase link [Currently on 2/23/2015 on MassDrop, great warranty support, 2 days left!!]

 
 
  Packaging presents the IEM quite well and comes with extensive instructions, which are all written in Japanese, which is no surprise as this IEM is somewhat exclusive to the Japanese market. FX850 comes with "spirtal dot" tips in 3 sizes, foam tips in 2 sizes, it's detachable cable, shirt clip and leather pouch. First off, JVC stepped forward and introduced new exclusive tips to come with these. While they look like generic single flanges, they have small dots inside which are suppose to effect the sound in some way, though at the moment no objective data has been shown as to exactly how they do so. The shirt clip is the best I've seen in the business as it's clip on mechanism allows it to be used with any cable at any given point, unlike any other shirt clip I've seen. Lastly, the leather pouch is not only aesthetically pleasing, it protects the IEM quite well while being practical. Never had a problem placing the IEM in the pouch, nor did I feel the IEM was insecure inside. All in all, the packaging is above average and the accessories are among the best I've had experience with, as you get the best shirt clip and pouch I've had experience with, in addition to exclusive tips. Compared to the previous flagship, you no longer get generic tips and shirt clip and the leather pouch is slightly bigger, making it easier for the user to place the IEM inside. Unfortunately though, I find the foam tips to be somewhat useless as they taint the sound of this IEM, if foam is a must, I would recommend Comply TS400 or T400. 
 
  The FX850 is simply gorgeous and after owning over 100 IEMs,  I can safely say it's the best looking IEM I have owned to date, along with the 650 and 750.   The FX850 keeps the standards of the previous Wood series and improves upon it, as the wooden housing is even more sturdy than the previous cut of wood used in the FX500 and FX700. It has a more reddish color of wood compared to the previous series and what seems to be brass instead of aluminum used in the previous series in the back and front of the housing. But with such great looks, comes great responsibility, the downside of the construction is that it requires great care. I would avoid contact with rain, sweat and intense heat. In addition, the brass portion of the housing tends to scratch very easily, so marks on this portion seem inevitable but luckily discrete as long as it's taken care of. I would not recommend these as a sole, all-purpose IEM as there are times I avoid using it to prevent any possible damage or scuffs. The detachable cable is thick and sturdy and the connection is very secure, never did I have any connection issues. I had a generic mmcx cable intended for UE/Westone/Shure IEMs and it didn't quite fit as the connection as it was slightly different. Whether a certain mmcx cable fits or not depends on how it's connection is made, but folks at the FX850 thread will be glad to help. 
 
    The housing is the biggest of the 3 in the new series, so it is slightly less comfortable and bulkier. The housing is straight barrel and relatively inviting, but it's size may be troublesome for those with smaller ears. Over the ear can be done but it's impractical, I recommend a traditional fit and use of the shirt clip to avoid microphonics and relieve the weight. Isolation is average, but solid despite the vented the design. Granted, not as isolating as a fully sealed IEM, but still solid for outdoor use, in my experience, as long as a good seal is achieved. To mention, due to the housing size, some may have a problem with how much the IEM sticks out as it's very long and somewhat bulky though should be quite stable with a good seal. Isolation is about -15db if I were to guess, based on other results on IF. ER4P with the highest isolation is at -43, but I suspect more of a -20to-25db isolation in actual use.
 
  JVC IEMs traditionally have a v-shaped house sound in my experience. Having tried the FXD Series, FXZ200, FXT90 and previous Wood series IEMs they all had similar sound signatures which focused on bass and treble. Unfortunately, I found them all to be too bass heavy and harsh in the treble. While I greatly enjoyed the FX700 and FX500 due to their one-of-a-kind timbre, they emphasized the treble and bass far too much for my taste and their audible distortion distracted from their sound. Before the release of the Wood series, JVC introduced their triple driver dynamics FXZ100 and FXZ200. With the FXZ200, JVC toned down the bass presence a wee bit and made the treble and midhighs noticeably a tad less present than previous JVCs. Unfortunately it wasn't enough for my taste and they too displayed audible distortion in their sound, though luckily a tad less bothersome than the old Wood series. Regardless, it was a step forward, so I was confident the new Wood series IEMs were going to be a step in the right direction, even if JVC had decided to not step too far from their comfort zone. Turns out, I was right...
 
Bass: The FX850 like all JVCs, displays an emphasis in the bass region. Objectively, it's about 8db from neutral (using Olive-Welti curve as a reference), with an emphasis in the midbass (150hz region). While I enjoyed the slam of the bass, it's bass is simply too much for my taste and would have preferred if the bass placed it's focus in the subbass. Compared to the FX700 and FX500, the bass presence is actually about the same, but the bass is much cleaner. This is because the new wood series no longer have audible distortion in the bass region, a huge flaw in the previous iteration. For my taste, I EQ down the bass about 8db in the midbass region, but choose to keep most of the subbass to maintain the slam. I will say that the bass is the biggest flaw of this IEM because the midbass is a bit too elevated in relation to it's subbass and even with proper EQ it can sound less clean and powerful than say, the bass of the Sony MDR-EX1000. 
 
Midrange: The midrange was said to be recessed in the previous Wood series as is the case of all JVCs IEMs. In this new series, I can safely say, it's the most midrange I've heard in a JVC, but there is still work to be done. The emphasis in the bass and treble is still there, giving the backseat to the midrange, luckily the treble has been tone down much more, allowing the midrange to shine much more than before. What makes the midrange special however is the timbre voiced by the wooden driver. Once EQed, the midrange shines in both tonality and timbre, in it's own unique way unlike other IEMs.
 
Treble: This is where I found the most improvement in these new JVC Wood IEMs. The treble is much tamer than before as you no longer get a very harsh metallic tinge previously present in the FX700/FX500. The FX850 however is still somewhat a bit bright on top, specially in the 5k region, but I no longer have to use heavy EQ to tame it. Tips that I found even out the treble quite well are the Meelectronics M-Duo triflanges. Treble extension could be a bit better, but overall pretty solid with no early roll off. 
 
 
  The soundstage of the IEM is above average and bandwidth is solid at both ends. What makes this IEM stand out however, is it's unique timbre. No where else will you hear such a voice in an IEM, strings specifically sound very special with these, unlike any other IEM on the market. Even with non-acoustic sounds, the timbre shines through as you hear a very natural, unique voice throughout the listening experience. While the tonality has it's share of flaws in stock form, with the right tips and EQ, you can turn this unique sounding IEM into a fairly neutral monitor. To illustrate how I would have preferred the tonality, here is my EQ modification below, using EQ10 via iOS. 
 
 
   I recommend this EQ setting, M-Duo Triflanges with the deepest fit possible, blocking the back vent completely with masking tape and poking a needle hole. This is how I find these to sound best. 
 
  For 300$, I would declare this IEM as a fairly solid value, though the FX650 and FX750 deliver more value in terms of sound quality. In the current state, where some IEMs are priced in the 1000$ mark with no outstanding innovations to warrant their price, the FX850 is doing pretty well for an IEM with such a unique sound. No generic BA drivers, no plastic diaphragms nor gimmicky hybrid designs are used here, just a simple dynamic with a truly unique diaphragm. While I'm generally not a fan of JVC for the use of a heavily v-shaped sound in their line-up, the Wood series provides something that is unlike anything out there in the market due it's timbre with solid performance to back it up. I will state however that I find the sound of the FX750 to be slightly better. While the treble is slightly peakier than the FX850, the FX750 has slightly more forward mids and cleaner bass response. Both of are slightly better than the FX650, but the gap between the FX750 and FX850 is smaller. Of course, what the FX850 has, which gives it much more value, is the option of a removable cable, which increases it's longevity tenfold. 
 
I would like to thank user James444 for the loan and Head-fi for allowing me to make such great friends!!!
 
notable links
Official Page
Golden Ears Measurements
Presentation Video
FX850 Head-fi Thread