just bought them...Gotta say, they are horrible. Running them for about a week. Full burn in. They are muddy. Yes they have bass but sound is awful.   They are going back. ATH-50X here i come

After much research, my birthday money goes to the S6. My only gripe is a scaled down basic UI. But in the end the sound is the most important thing.   I was contemplating 6S, Opus1 the bit, Fiio x7 and Aune m2. Review on this were to good to pass up.   the 6S Its on its way!!!

Nope, only drawback...

Yes it does! Very well i might add

Without question yes! You can get as low as 900 for Japanese version. Unit is identical to the US unit.   Its the best unit I own.

I have both.   Both sound incredible. Fiio x7 user interface is an updated Android UI. Very sleek.   The sound is very good clean and clear. That said it lacks the overall bass/wow that the ZX2 has.   I will be  returning the x7

Good move...I have both.. the x1 is an excellent unit for the price, however the Sony is a major step up.   Performance, size, user interface, bluetooth.. Sony hands down.