McCormack DNA-1 runs hot

I think this is normal. I've had two. Both ran relatively hot.

Bias needs to be re-adjusted.

I haven't checked the temperature, but I think it is more than 100 degrees F. Others amp that I used (eg: Odyssey Stratos) didn't run hot at all. I sent an email to McCormack about that and waiting for their comments. Hope this is not a big issue given all the good reviews about this amp.

I've had amps run even hotter than 100F (eg ~120F or more for an Ayre V3). Ayre technical support told me "heat is good"

That might be fine for Ayre but heat damages parts like capacitors. I routinely have to rebias McCormack amps back to factory spec. At idle you should have no problem keeping your hands on the heatsinks for 10 secs at least.