Here's a text and video review I did of a very small but nice sounding headphone amp: http://www.hifiheadphones.co.uk/forum/headphone-reviews/1759-electric-av...
SoundMagic HP200, Final Audio FI-BA-SS, V-Moda M100, Sennheiser IE800, Beyer DT770LE, FiiO E07K/MicroStreamer/Vamp Verza DAC/amps, FiiO E12/Zen Head amps.
The PA2V2 finally ran down today after 27 days of use. The past 10 days I was thinking, since I use it daily for at least 3 hours, the battery was never going to run down, so I left it on 24/7 for those 10 days and it finally started breaking up.
So it's very efficient when the power is on but not driving a headphone, yet whatever power conservation tech it uses has no tendency to lag when a signal is applied.
Nice one Dale, the picture is superbly taken, really nice. Shame the box looks half finished!
If they could make that volume knob fold, collapse, or otherwise get out of the way, they would have an ideal portable amp for all occasions.
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