Heat heat and more heat??

Daveyf,

Curiosity killed the cat. Did you disconnect the Sub from the amp to see if that was the cause of the heat?
(I assume the heat is coming from the power transistors heat sink fins on each side of the amp.)

If you did disconnect the sub and the amp still runs hot.......

Al, (Almarg),
If the bias was off for the power transistors of one channel or both, wouldn't that cause the amp to run hot?
.
Jim