for what iread about
@Sonic Defender
post HE WAS REFERRING to the ability to drive some more power hungry cans f.e 40-ohm or 70-ohm ones.... just that and i agree with him even my ZX100 has the same 15mW output power and i can attest it cannot drive hungry cans well without an amp
Ok, I want to clarify this. The ZX2 does really lack power, however, it is not at the level of "un-acceptable" when paired with it flagship headphones, the Sony Z7. Not at all, and in fact I used Zx2 to tune and modify my Z7, which has been proven enough by other members to have brough serious improvements into it. So, really, it is not that bad that you can not find any full size the Zx2 can not drive. For example, Z7, TH900, and other Fostex for sure.
Now, Zx2 will be lacking that power and finesses to drive these headphones out of it single ended connection, but with it TRRS out, it is what I had been using, and if you asked me, would I use the Zx2 to purely drive my Z7 ? Yes, I would. It doesn't drive the Z7 into the uncomfortable level of listening, but loud enough to satisfy, and still remain the level of finesses and quality of a high-end player.
Many people make it out to be like a horrible "deal-breaker" but it is not....the Zx2 sacrifice this for the untouchable battery life. I dare you to find another DAP on the market for this quality sound and battery life. On top of that, the Zx2 does very well with 3rd party apps from Google stores, including tidal and Spotify for high quality streams, and that is a big plus
Remember, people, everything has it pros/cons. You just need to work around it. Certainly, the Zx2 won't have the power to drive those like of Hd800 to it utmost finesse......but try to buy anything more sensitive like Z7, 70 ohms 108 Db/mW for example. Do use TRRS whenever possible, and who is to say it doesn't bring high quality music ? I have full confidence showing off my Zx2 + TRRS silver cables + modified Z7, and will give people a listening bliss of which can last for almost a week without charging. Try challenge it ?
Picture for references . Battery life, sound quality, together with the portability of these 2 are unmatched by anything on the market ATM.