Funny story: "ostry" in polish means, that item is "sharp" :E
Headphone Reviews and Discussion - Head-Fi.org
smith
Great review. Thanks.
Kaizer-J
Thanks for the review. I wonder how do these compare to other IEMs? It's a bit hard to judge how good do these really sound without any point of reference.
twister6
@Kaizer-J : it's hard to make a general comparison, but from experience of headphones I've tested, a single dynamic driver phones can't quite match micro-details and surgical layering of multi-driver BA headphones. These are great, but I will be lying by saying they beat details of $500 phones. But at the same time, I prefer the sound tuning of KC06A over everything I have in my collection, and that goes for W40, IM03/IM50 and even my latest acquisition of VSD3S. Of course, it's all a matter of a personal taste, but trust me - KC06x have a top notch sound! If you have any specific questions or comparison to phones I have listed in my sig, drop me a PM.
james444
Excellent review, thanks! I agree with everything said about the KC06 (haven't heard the KC06A) and would rate them at least 90% of my K3003 and UERM in sound quality. Prospective buyers should be aware that they don't offer much isolation though.
Sweden
Do you have any comparisons to other in-ears?
twister6
@Sweden : any specific ones you have in mind?
Udi
Any comparison to the GR07 Classic?
twister6
@mebaali : KC06A is in a similar sound sig category with T1E and VSD3. VSD3S is more comparable to KC06 with less bass and brighter upper mids/treble. B3 Pro I is more toward the warm neutral with some bass enhancement and needs an amp to make it shine. In a group with KC06A/T1E/VSD3, there are some variation as well, where for example KC06/KC06A has a good width but not as good depth in sound, while T1E has the strongest bass, and all 3 have a different level of upper mids/treble rendering, really up to a personal preference. With KC06, some people prefer its more detailed higher frequencies, while i found it harsh to my ears, thus preferring KC06A over it. Some people prefer the wire down fitment of KC06/KC06A and being able to wear them even then when fall asleep, and so on. Overall, if you don't have external amp, cross B3 Pro I off your list. If you don't care about strong bass and want more neutral/balanced sound, cross KC06A, VSD3, and T1E off your list. This way you narrow it down to KC06 and VSD3S 
See which fitment/style you prefer the best, maybe that will guide you further!
See which fitment/style you prefer the best, maybe that will guide you further! 
mebaali
@twister6 - Wow! Your reply has in many ways given me answer(s) for which the questions I never raised openly. Seriously speaking, I thought you did a telepathy on my predicament. BTW, I am not at all intending to use an amp, and most of the time my audio source(s) will be one of these - Samsung Galaxy Y, Nokia N97, Transcend MP350, and Fujitsu Laptop. I already own Pistons 2.1, Soundmagic ES18, and expecting to get my KZ EDSE, ES, and LPS in few days time. I listen mainly to EDM, and Post Rock genre. After hearing(reading) so many horror stories about QC issues with VSDS3 cable, I have stricken it down from my list on upgrading my current IEMs. Havi B3 Pro I and TTPOD T1E were final two remained on my list. In the past, I have used Soundmagic PL30 (which was said to be very lean on bass and more towards neutral sounding signature), despite having poor audio sources I thought of giving Havi B3 Pro 1 a go for a different musical experience instead of TTPOD T1E (which according some head-fiers, to be having sound signature pretty close to EDSE which I am about to receive). Till today, never thought about Ostry's but your review has made me very curious now.
Paulus XII
Holly ****!!! 90% of UERM for 76€? :O
egosumlux
I heard both and liked KC06A a lot
I think I would like the KC06 more, and that's great since they are even cheaper, thx again for the review and nice pictures.