Please spare with my broken English.
My first language is not an English LOL.
 
 
I have placed order my nt6 from hidition about 3 weeks ago. 

They took exact 2 weeks to build iem (10 business days) from the date they received my ear impression.
My NT6 is little special than others because it is original version of NT6. (NT6 Ver.1)
Basically what you see on Hhidition.co.kr or inner-fidelity's review is revised version of this nt6. (NT6. Ver.2)
(hidition do make nt6.Ver.1 under customer's request so if you want version one just let them know.)
 

 

 

 

 
 
 
Overall Build Quality.
I was very impressed with their build quality. 
The shell had no visible air bubbles. I have one really tiny air bubble on my left shell but
It was so tiny so that I did not even notice until I took a close up shot of them. 
I have previously owned JH11, 13, 16 and UM Merlin so this is my 5th pair of CIEM.
I would say Hidition's build quality is for sure better than JH audio, and on a par with UM & UE
Printing quality is absolutely amazing although I still think UM has the best printing quality.
Hidition still can compete with UM in terms of art quality. Cables are very flexible, thin and light. There is zero cable thumps.

 

 
Fit & Isolation
All of Hidition's products are based on musician fit so they require full depth of impression.
Therefore isolation is among the best out of all of my CIEM that I have.
You can request Hidition to make your CIEM in normal listening depth but some iem need insert depth 
for the extension on treble. I have no issue with fit and comfort for long term listening even though they are musician fit. I think Hidition did a great job on matching my iem to my impression.
 

 
Sound
 
I tested my NT6 with Fostex HPA4, Astell7Kern AK100, Fiio X5,X3, Samsung Galaxy S5 and some other portable rigs
because IEM meant to be used for outside portable listening environment.
 
I mainly listen to Rock, Heavy metal, Classical, and Movie & Game sound track.
I have owned JH11,13,16, UM Merlin, Beyerdynamic T1, Sennheiser HD800, Audeze LCD-2,XC
Grado PS1000,GS1000, so I should be able to compares NT6 with some other headphones that I have
 
Hidition NT6 sound is super well balanced yet fun.
I know it sounds odd but I can't think of any other way to say it.
For all of other my custom iem or headphones that I have, I can tell there sound 
signature easily like jh11 being V shape jh13 is mild U shap etc.   
However NT6 is just being good at everything. NT6 has an analytic sound while having 
all fun that you want.
 
Bass: NT6 bass is absolutely tight and well control. I can feel the extend down all the way to 20hz
where Human's hearing limit. It has emphases on sub-bass area around 20hz and then slowly comes down to
flat by bass reign, so there are absolutely no boominess or fluid. Everything is Tight and well controlled while 
having all the bass thump that you want. Separations between bass instruments are fabulous. You can't find any interference between bass instruments. While kick drum has its punch, bass guitar remains clear and fluently.
You can feel cello, and kettledrum's deep and grand vibration While they are clean and vivid.

Bass do not overwhelm and mud out mid and high.

 
 
Mid: Mid-range is where NT6 truly shines. Mid is super clear and vivid and close to you, 
yet they are not super boosted like Shure IEM. It is distanced as they should be. It’s not laid back nor forward. 
All of mid-range Instruments have a greatest details out of all of ciem that I owns. It's clear, crisp and transparent 
while not being sibilant nor sharp. Vocals are smooth and crisp and do not miss any of details like JH13. 
Presentation of the mid-range is stunningly natural. They sound like instrumentals are played in small studio space.
Even comparing NT6's mid-range to some of headphones I have like Beyerdynamic T1, Audeze LCD XC, and Sennheiser HD800,
NT6 feels natural in overall tone and presentation. In my opinion NT6 reached the cutting edge mid-range that CIEM can have.
 
 
High: NT6 has a little emphasis on treble reign. However due to emphases on sub bass, it does not
makes sibilant or harsh treble. Treble extension on NT6 is absolutely outstanding. When I tested my JH13,16 
and UM Merlin they all tent to rolls off around 14khz area. 14 kHz isn't narrow FR range but still some time I just feels like 
I don't want to miss any of information in the music. My ears can hear up to 17 kHz on my right ear and 17.5 khz on my left
and NT6 reaches up to 16~16.5khz easily then rolls off. Due to its amazing extension, all of instruments are super clear and they 
image accurately and clearly. All the treble reign instruments are crisp and transparent. 
 
 
Downside: The only down side of NT6 interns of audio quality is that NT6 makes every single instruments way to clear and vivid. 
No information is filtered so there is way too much information to listen to. Some people love it because they can hear everything in
super detail  but some find it too tired to listen to because there are way too many things to focus. 
If you want to have same sound signature with little bit of easier listing experiences, try to get revised version NT6(NT6 Ver.2).
 
 
Comparison with some of top notch CIEM
 
Noble Audio K10
I have heard K10 demo pair in Vancouver head-fi meat. I borrowed it for few days from the meat host Girls Generation.
K10 sounds absolutely amazing. It is one of the best CIEM you can get from the market today.
It’s warm, well balanced while has all the fun in music! It layers music so dramatically 
you can almost feel the depth of music. Comparing it to NT6 ver.1, K10 has more of 
filtered or cleaned up sound. Cleaned up means it has all the details that you need 
while hiding all the unnecessary information.  K10 is more musical sounding
while NT6 is toward more to analytic sound. 
I would say NT6 has more transparency and vivid sound then K10,
yet K10 is more easier and comfortable to listen to.
 
 
JH16
I personally do not like JH16. Choosing JH16 was my biggest regret in my audiophile life.
16 really stand out when you use in stage. I bought them to use on the stage but I tried 
on my audio rig and they sound so rough and colored. Especially on mid bass are so emphasized, 
the male focal becomes way too warm and unnatural to my view pint.
 
 
JH13
JH13 will be a good ciem to compare with.
Simply if you fill up the missing information on jh13, they will sound 
pretty much similar to NT6. The two things that I did not like on jh13 was
lacking information on mid high reign causing female vocal to sound stuffy, and treble extension.
When female vocal or mid high instruments reaches the climax, I was drawn off from the
music because they sounded bit dull and dry. And NT6 fulfills my complains on jh13
 

 
UM Merlin
The sound signature of Merlin is quite similar to NT6.
Main differences that Merlin have is the bass and treble nuance. Merlin has richer (lose) bass while NT6 remains tight and controlled.
Merlin's mid-high and treble are bit sharper and drier than NT6 due to high peak with narrow extension on treble.

 


 
Overall Packing is better. Now they comes with 2 cables. One is 1/4' plug and the other is large XLR plug.
 
Audeze also gives you 1/4" to Mini plug converter just like Grado.
 
 
This is my first impression of LCD-XC
 
 
Extremely well extend and Tight bass.  Bass is even deeper than LCD-2 rev.2 that I have. Well controlled and really have tightness. 
I would say this headphone delvers the best quality of bass.
 
Full, Rich, Juicy Mid-range. One of the main differences between XC and any other LCD series is Mid-range. 
I would say it is lightly forward where I felt X, 2, 3 was neutral but yet laid back around 3kHz. 
However, XC delivers Mid-range amazingly accurate. It is very detailed and juicy!! 
 
Crystal clear and well extended High. One of my main problems with LCD-2 was extension on high.
It was somewhat restrained. Now with XC high are Crystal clear and you can hear a fantastic extension without getting rough.
It is truly amazing how audeze delivers high frequency range with XC 
 
Amazingly accurate Imaging and Wide stage. The other problem with LCD-2 was small Staging. Although imaging was accurate, sound stage was very 
compressed. Yet XC has extremely wide stage. I would say a little bit smaller than Sennhieser HD800 but still bigger than most of open back headphone.
Imaging is even more acutate then LCD-2. Now when I listen to audio track, I can feel where the instrumentals are located   
 
Even though LCD-XC has so many good modifications on sound, they have critical problem. It is extremely heavy.. 
It is 100g heavier than LCD-2 Rev.2 So it is total of 650g...
After wearing them for hour, I had to take it off and rest for few mins in order to maintain listening. 

I won't say much because I know you guys will laughing at me
 
When I say Beats headphone sounds good. LOL
 
So I brought some factual fr response measurement.
 
I compared new beats studio with Sony MDR-1R, Sennhieser, Momentum on ear, Momentum over ear and HD-25
 
Take a look. Red Color graph is Beats New Studio
 
 

Beats Studio 2 VS MDR-1R
 
 

Beats Studio2 VS Momentum On Ear
 
 

Beats Studio 2 VD Momentum Over Ear
 

Beats Studio 2 VS Sennhieser HD-25
 
As you can see They are quite compatible with those $200~$350 dollars headphones.
 
Let me show you THD (Total Harmonic Distortion) of beats 
 

THD of Momentum Over Ear
 
 

Beats New Studio
 
Surprisingly Beats outperforms Momentum Over Ear by THD~
 
However since studio has active noise canceling tech, It cannot avoid some distortion.
 
However as you can see Beats New Studio outperforms some of audiophile headphones in its price range!! + noise canceling + Sturdy build.
 
We should respect Beats Audio's effort on it~! 

.Comming soon

Coming Soon.

I will describe it very simply since I am not English speaker...
 
H6 was demoed with ipod Touch 5thG Galaxy Note2 ifi audio ican + idac.
 
I owns some of flagship headphone like grado PS1000, Gs1000, Audeze LCD-2 Beyerdynamic T90 AKG K702 etc 
 
so I think I know what I am talking about.
 
Out of all the B&o earphone and headphone series (except U70 cuz I never tried) H6 shows the best performance. 
 
I personally don't like B&o Due to over priced products.(So I hate New H3 in-ear) 
 
However H6 has changed my impression of B&o. 
 
H6 has what we call audiofile bass. Its Deep Clean Tight and Fast. the Bass is not really Emphasized but it still does what the bass have to do. 
by Sub-woofer test, I was able to hear down to 30hz which is pretty amazing result for this small type of headphone.  
Separation of each bass instruments are amazing. I can hear every different instruments very well and clean. 
 
Mids are natural, Clean and detail. vocal are very natal and detail. H6 capture all the details of vocal. Guitar is clean vivid and rich. 
Snare drum is not as strong as those Grado or other Metal head cups but it is fast tight and sharp. There are very slight emphasize on mid but  
it's just very little amount. Just like Bass, All instruments separated well and nothing got muddy or mushed
 
high are crystal clear and detail. Some might find it too bright because there are some emphases. Those little bit of accent on high gives clearness and details to the mid and all the high frequency instruments like symbols, Harmonics of Violin and etc. However, as I said its can be disadvantages for listing. It might get tired easily. It seems like it reaches up to 14khz to 15khz but I wish it could
reaches up to like 17khz or 18khz (since its $430!!) Oh well Not many people can hear that high especially in crowded area like train, bus or shopping malls
 
Staging is quite big even though enclosure of H6 is very small and compact. I would say it is biggest than LCD-2 (LCD-2 is not the greatest staging headphone) but it's not 
as great and big as Beyerdynamic T90, Grado ps1000, gs1000 or AKG K701 which is well known for good staging. imaging is accurate. I can hear where are all instruments located. however somehow most of instruments are located at back of my head. It happens with GS1000 as well. so I am guess there are some Phase issue with it. Well as long as it is clear enough to tell, I don't mind.  
 
If you looking for Good design with natural and clean like audiophile headphone with big, and accurate sound stage H6 can be the way.
It's too sad I am paying extra $30 just because I live in Canada..

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Good design. Built for modern electronic music and some heavy metals( due to its metallic sound)
 
Some might find it tooooooo dynamic, little bit laid mid, some might find its toooooooo sharp, bright, and edgy.

 

 

 

 

 
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[size=10pt] [/size][size=10pt]I had listened to C421 which is JDS's previous portable amp[/size]
[size=10pt] [/size]
[size=10pt]What I see with C5 is Simpler function yet compact. It sounds like they cleared up[/size]
[size=10pt] [/size]
[size=10pt]some noise that C421 had. and some other problems(Output Impedance)[/size]
[size=10pt] [/size]
[size=10pt] [/size]
[size=10pt]Bought from Headphone Bar and There was 3 guys including store owner and me[/size]
[size=10pt] [/size]
[size=10pt]were comparing it with Schiit Asgard, LYR, Barson 160HD, Soloist.[/size]
[size=10pt] [/size]
[size=10pt]with HD800, LCD-2, PS1000, He-500[/size]
[size=10pt] [/size]
[size=10pt]What we found out is C5 is really powerful and there is nothing better under 500 AS portable.[/size]
[size=10pt] [/size]
[size=10pt]C5 was able to Run HD800 with 24 levels out of 60 levels of volume. LCD-2 was 25, PS1000 was only 14![/size]
[size=10pt] [/size]
[size=10pt] [/size]
[size=10pt]Sound wise? C5 sounded as good as Asgard. 3 of us could not believe it was just portable amp.[/size]
[size=10pt] [/size]
[size=10pt]It has little warmer sound but not too warm like Asgard. It does not lose any details through whole FR range.[/size]
[size=10pt] [/size]
[size=10pt]I do find My Edition 8 has little warmer and richer in sub-bass when I compare it to E11. All the details are there as I put in in to Asgard and [/size]
[size=10pt] [/size]
[size=10pt]LYR. [/size]
[size=10pt] [/size]
[size=10pt]Staging was increased comparing to E11. Not as wide as regular indoor headphone AMPs but One of the biggest on this price range.[/size]
[size=10pt] [/size]
[size=10pt]I do recommend this to who are looking for better portable amp than E11 but not willing to pay over $300 ( I haven't but you might able to find some good portable amp for $300).[/size]

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  I previously owned UE triple-fi 10pro which was ue's old flagship iem.

Just got them today and this ue900 has a lot of improvement.

First thing is isolation. Tf10 has medium level isolation comparing to

Shure’s or Westone iem

However Ue900 now provides a way better isolation than tf10.

Second it is so much comfortable compares to tf10.

I had no issue with wearing my Tf10 but

with ue900 I can only notice I am wearing headphone when I touch my ears.

Third is the midrange. Tf10 has more distance on vocal and some midrange

instrument yet ue900 brought those distanced midrange in to your ears.

It is full, rich and vivid.

The last is bass. Tf10 has Mid-bass boosted rather than sub-bass which makes sound a

little boomy. However ue900 has linier response between Sub-bass and Mid-bass which

makes bass deeper, punchier and tighter.

One thing that I was wanted more was treble like tf10 but it's not mean that ue900 is

lacking of treble. It is just my taste of music.

By looking at ue900, I can tell Logitech ue has put so much effort and time to replace their

old flagship iem and it seems like they did great job.

This headphone has outstanding Design and Perfomance. Very balanced and natural sound

one thing i have to talk about is its ear pad.

this earpad is just attatched with double side tape...............

I can't believe that they just used tape to hold them...and it is over $1000 headphone.....

but it sounds the best out of my portable system.

[size=10pt]  I just got these two days ago. I am running these with my Bellari HA540 and Grado GS1000i[/size]
 
[size=10pt]GS1000i already has quite big sound stage (about head size for left, right, back, and top), a with Bellari [/size]
 
[size=10pt]HA540 and by Adding Bifrost, they become even bigger by half head size. I can clearly feel where are the [/size]
 
[size=10pt]sounds coming from. Bifrost adds more resolution in to your music it is crystal clear.[/size]
 
[size=10pt]I would recommend this to everyone who are looking for DAC under 700 USD. [/size]

[size=10pt]I was surprised that I can get this quality of sound out of under 400 dollors [/size][size=x-small]amp.[/size]
 
[size=x-small]I[size=10pt]ts truly amazing that this has [/size][/size][size=10pt]fast tight response even though it is tube amp and yet it capture all of [/size]
 
[size=10pt]harmony that tube amp has.[/size]
 
 
[size=10pt]I was expecting a lot of heat because it is Class A type amp and yet it doesn’t have much heat.[/size]
 
[size=10pt]I can even touch the tube while it’s fully running.[/size][size=10pt]The power is plenty so with my gs1000i, I only need [/size]
 
[size=10pt]to [/size][size=10pt]raise one ~one and a half gradation.[/size][size=10pt]it has almost no background noise and when I starts music it [/size]
 
[size=10pt]disappear.[/size][size=10pt]Greatest tube amp under 600~700 and i do recommend this to all of Grado user and [/size]
 
[size=10pt]people who are looking for amp with great price[/size]