Shaggy1994I have these headphones and just got this amp. I havent switched out the stock tube but it sounds amazing. It is multiple steps up from my previous udac 5. It drives the headphones perfectly fine.
Shaggy1994I literally just hooked them up. And I realize this is a necro, but if you wanted or gave a damn about the info now. I can tell you I found my DT880 600r to be a bloody wonder to enjoy on this amp. So far my favorite tubes are a Raytheon D getter, Mullard (of some kind), and little has been putting up substantial enough fights against my Yugoslavia or Matsushita toobeys.