What is the average life you get out of a decent power amp before a repair? Looking at stuff like Crown, QSC, Crest, and others in their "league" Lets assume that you never leave it in the car, clip it constantly, turn it on and off all the time, leave it on all the time, over heat it, or abuse it. But DO use it regularly - like once a day. One on and off cycle or so and maybe 3 hrs of playing. I got 15 out of a Crown once. Only 5 on the QSC I have now... Still ticking..