today i advise everyone of you, who loves music, to reconsider your audio equipment as soon as possible. the reason behind my note is simple: since one week i use a completely new, mobile music reproduction chain and there is so a huge difference between the sound quality of my old samsung galaxy nexus in combination with not so bad philips over-ear headphones and my current setup:
htc one ==usb audio out==> fiio e17 dac & hp amp ==> vsonic gr07 be in-ear monitors
alternatively the fiio e17, which is built in china and not least because of that of very good value, can be used solely as a digital analogue converter or headphone amp, even as a sound card on your pc. two more accessories will hopefully arrive within the next week, including an ultra-compact micro- to mini-usb otg cable adapter to link smartphone and dac with minimum space requirements when being on the go.