I’ve got quite a simple active two way system (with an active sub) and, since the UKs heatwave, have found the amp overheating and shutting down. It’s an Audison AP4.9 and very small - it’s also mounted in the spare wheel well. I’ve now raised it up on spacers so it’s not against the carpet and also removed the felted boot floor lining - let’s see if that helps or if I’m going to have to add some fans!