When you press the front "standby" button, it goes into low power (therefore low heat). I measured 2 watts on the Kill-A-Watt meter. No way that will make it hot at all. By the way my problem with low subwoofer output i think was largely due to the very inefficient Ultimax 15" (Dayton Audio UM15-22) in a sealed 3 CF cabinet. The driver sensitivity rating is 86.5 dB 2.83V/1m, and the mismatches I had on the line level to the sub amp. When i ran my iphone headphone jack into the sub amp, and used 500 watts, then it sounded loud.