Finally got some extensive time with the portable setup (Cowon D2 and AirHead). Very comfortable listening for extended periods, over 9 hours at a time.
The portable setup doesn't quite have the imaging as does my desktop setup, despite a much more sophisticated amp and using a higher bit rate (in many cases lossless compression). Could either be the noisy airplane environment or else the DAC in the Cowon.
Any thoughts on this?


















