Just picked this amp up and while I think it sounds great, it really isn't the right amp for 600Ohm DT880s. While it gets relatively loud on high gain, maxed out, it leaves zero headroom if you like it louder. Sounds terrific on my HD6XX though.
It replaces a LD MKiii, which I think sounded great too, just wanted to reclaim a bit of desk real estate and wanted a "cleaner" looking stack. JDS absolutely should have packaged this great little bit of kit more attractively. The volume pot, the buttons, the case, everything is plastic. Brutal. I think they could have finished it entirely in aluminum and tacked on an extra 15-20 bucks without losing a single sale. Actually, I think they would have easily and significantly increased their market share in this segment if the entire thing wasn't housed in plastic.