I love the O2 and the ODAC, its a marvelous pairing for most cans except ones like HE6's etch...
I built the desktop O2 called the ODA from an engineer over at DIY Audio, it has measurements similar and in some cases better than the O2.
Designed in the same spirit it has evolved to version 2.1 and may evolve even further.
It has 3 times the current capability of the O2 and can drive even HE6's with authority.
Check it out if your a DIY person, you can't buy this one .....maybe someday.
Edited by adydula - 7/30/14 at 5:26pm