Originally Posted by DaveHCYJ
I bolded the problem with this statement.
The Onkyo is 100 watts per channel and THX certified, while the Pioneer is 80 watts per channel and not THX certified. That is probably accounting for the "heat" coming out of the 608 compared to the Pioneer 1020 (I haven't felt the pioneer I can't comment on its temperature). But by the way my 608 and so far consensus among owners in this thread is that the 608 is not hot.
Both the wattages above are at 8 ohms, 20 Hz-20 kHz, 0.08% THD, 2 channels driven.
I never said that Onkyo & Pioneer have the same output power - just that given the same output, lower current drain is not a bad thing. There is no problem with that statement.
As of THX, traditional design needs a beefier power supply to comply, and will generate more heat - because it spends power even doing nothing. Switching amp needs tighter MOSFET on/off timings to comply, which does not increase idle drain.
So yes, Onkyo has 20% more power and will probably win audio competition in a larger room. The price for that is 100% higher power drain and corresponding increase in heat, which forced Onkyo to put a fan in.
Question is, how often do you run your amp at full power, for that tradeoff to make sense? If you run Onkyo at 80% and Pioneer at 100%, they will have same output but Pioneer will still spend half the energy and be a lot cooler.
About consensus on Onkyo being "not hot". Everyone who says that, is comparing it to older Onkyos. Boiling water is not hot compared to melted metal, there is a consensus about that too.