inputs.text: fantastic really not beginner faint heart - thing great first wow instructions terrible believe terrible not even begin say iti pretty sophisticated audiophile gadget lover figured spent lot time internet research totally worth trouble not going take package use no notfirst upgrade firmware really not make firmware easy find either buried rar file uses rar googling find youtubes helpfulsecond buy download users manual fiio instruction sheet comes well bit sparing actual info fortunately users manual packet contains firmware update heh hehthird great fun really thing great cheap mean hell think sweat equityi using shure srh 840 wow sound quality flac files wonderful crystal clear dynamic volume adequate big headphones gain low listening half volume impressedthis little thing little amazingit sounds vastly better plugging phones computer good yamaha receivers dac playing digital files computer hdmi coax goodbut important not much fun long time play stand alone dac playing hi res files hdtracks straight computercannot waitby way peoplesay cannot hear difference mp3s high resolution flac files one thehem looking mp3 player still good idea x3 plays mp3s since takes 64gb micro sd card huge amounts storage hobby