I have just wrote up a tutorial on how to mod the DT880 600ohm to balance. Basically separating the grounds and going with the more common dual 3.5mm cable.
So right now, I am essentially powering them with my THX 789, which does 400mw at 600ohm. It isn’t as powerful as the Emotiva BasX A100 which does 600mw, but it’s close and it is just right. You don’t have to crank it up to full tilt and suffer through distortion.
I can hear the micro details of Yoko Kanno’s Piano Solo without being analytical. It’s just more of there. It’s not as spacious as an Elex, but the Elex doesn’t have this kind of detail too. The highs are well controlled too at that power, so no treble murder.
If you can and you feel comfortable, I do recommend modding it. It does bring out the best of it, especially with more power from balanced amps.