i'm not sure if anyone of you travel a lot and are or heavily into your high quality music but I recently managed to spend some time with the Chord Electronics new Hugo. This battery powered DAC/Headphone amplifier takes a USB OTG cable and using UAPP can play really high quality audio into a pair of hard to drive headphones such as Audeze or HD800. This unit I found lasted up to around 10 hours and would be perfect on a flight or long train journey or even on a desk at work.
Have a look, I realise this is a tonne of money but as I say, if you are into your HiFi and know Chord then this is very ideally priced.
Chord Hugo Portable DAC / Headphone Amplifier
Have a look, I realise this is a tonne of money but as I say, if you are into your HiFi and know Chord then this is very ideally priced.
Chord Hugo Portable DAC / Headphone Amplifier
Why not $150 FiiO E18? 