hmm, if the usual way I like is the way like to scream, and the zx1 I think is more like to talk louder, but not totally different, just a bit, but without this a bit I just can't feel satisfied. I like the sharp and high sound which could make me have gooseflesh like this song https://www.youtube.com/watch?v=nRbefCGnQ5E and https://www.youtube.com/watch?v=OQKsr3Kdk48 and this one https://www.youtube.com/watch?v=2xxySvoUb2Y， however youtube's quality is not high at all, loseless file is much higher and sharper and with my earphones get higher and sharper but I want higher and sharper without any seal loof, lol, I think it's just not a healthy and common taste of sound
What you are saying is a "preference" and not necessary being better. Do you have other benchmarks that you can compared your DAP with? I happen to find the ZX1 to be quite refined sounding with my JH13pro+silver dragon cable compared to my other DAPs. It has qualities that akin to more expensive gears. No it is far and away from my best rigs, but it does sound noticeably more refined than other DAPs that I have in my possession including variation of iTouch 4 & iPhone 4. It is also better sounding to my ears than my X3, X5, DX50, and modded AK100.
I sure hope someone in Japan can run a RMAA test for us. I personally don't trust RMAA that was conducted in Europe given that it was done on a volume restriction unit. I wish I have an iPhone 5S nearby so I can check it out myself.