HK receivers tend to run hot at idle as well. I have two HK receivers... other than TVs, they are the only electronics I turn off when not using. The rest seem to idle with essentially zero power consumption.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8