What happens when an amp overheats?
Once it gets too hot, it shuts down for protection. The most obvious thing to check is your Gain and Punch Bass control settings. ... If the gain is set too low, the amp will still make full power, but it might not sound as loud as it should, and you'll think you aren't getting much volume.
Can a guitar amp overheat?
A red glow over a large part of the internal plates of the output tubes means they're about to melt (yes, really melt – heat is our enemy). ... As long as they tubes don't overheat or stay overdriven for long periods, it's not fatal.