Great app for improving sound from iTunes on mac computers, makes your speakers or headphones really sing, smooth and very clean sound! It could be a little cheaper though!

I got Fiio e17 as a gift for my brother but i already own a Arcam rPAC so i got to compare the two! Fiio is about 50 dollars cheaper so if you got an extra 50 to spend on a dac/amp i'd say go for the Arcam! I found that it sounded more full, had a greater punch better detailed and overall was more musical.

If your looking for a fun sounding headphone thats strong on bass and and smooth sounding it could be it!

Hey head fiers! The rPAC is a great bit of kit! I got to compare this to Fiio e17 and the Arcam was just this little bit better than Fiio in every regard. It was just more musical - sound was more full, punchier and more detailed. Can't really comment on soundstage coz the headphones i used were closed back ones and not very good for imaging! And since i own the Arcam's rDac a standalone dac i compared the rPAC's analog output ability! The rDac is about twice the price of the rPAC so as i thought the little rPAC was not able to output a soundstage as detailed as rDac and i felt like there was a little treble roll off or some sparkle missing in the very highest frequency's! So in overal i would say if your after a little usb/dac/headphone amp and don't want to go the Fiio route i would highly recommend trying the Arcam rPAC!