This is strange. Most of the receivers/ amplifiers that I have been looking at claim power efficiencies of 80% or more using class F, G, H (or something else that wasn't invented when I was in college).

So where is all the heat coming from? It shouln't be from the power amplifiers, especially when they aren't doing much.

The Rat. M80s, VP-150, QS8s, SVS PC 20-39+, OPPO, Onkyo 703s, Harmony 880 Sony 60" SXRD HDTV