Wheee! I got home form work and proceeded to solder components into the PPAv2 ... board until ... um ... 3:00am. I then just *had* to listen to it a bit before going to sleep! I didn't notice the time passing and had no clock nearby
All that remains is to enable the bass boost and bias it into class A.
The difference in sound quality is quite readily apparent as compared with my OPA2227 (or OPA2132) based CMoy with my Grado SR-80s ... The bass is finally quite well rounded. I guess I finally have enough current available to make the Grado phones well in the bass range.