Thought I was king shit getting a Marshall AVT100 head for my first non practice amp. First time I used it with a band and another guitar player, I couldn't hear myself at all. Of course he was using a tube amp. Bought a Mesa Mark IV that I eventually loved, but when I first got it, it had old tubes, and it was before I knew anything about dialing amps. Horribly disappointed expecting Metallica. Not a good amp for a beginner IMO. Bogner Uberschall Twin Jet had me hating life. Had it sounding great out of the box, then moved some knobs and couldn't get it back. Now I wonder if it was just super sensitive to voltage swings.