To DPM or not? That is the question.

[ogs]

I also prefer to keep DPM off. The difference is small though. Do you see high temperatures on both units? Could be that heat transfer is not good enough between the amp board and copper bottom plate. There is a heat transfer pad covering the whole amp board. You'll see four screws in the middle of the bottom cover. Try tightening these a little (maybe one turn) and observe if temperature falls. I believe my 250 has around 50c with DPM off. (I'm at work now so can't give exact numbers)