Class A amps are designed to run hot so as long as the unit is vented properly you have nothing to worry about: I had a Threshold Stasis Class A/AB circa 1988 that was biased to run Class A most of time so it got very hot and I never had an issue until I got tired of it & sold it in in 2010: The designers like Nelson Pass know this and his companies Threshold & Pass Labs have buiding hot running & long lasting amps for years.If you are worried about heat, you should not be considering Class A amps or you can leave it off when not in use and turn on 2 hours before use.
Heat in class A equipment
Heat is one of the biggest enemies of electronic equipment. Does anyone know if this Heat is only at the output transistors and their heatsinks o8is it also present in other components within the unit.
I was planning to remove the top cover and with a IR thermometer going to check temps..
Has anyone done this?