I did a search for this and found a millions answers none of which seemed like my problem exactly. I have an Ampeg PF350 running into an Ampeg BSE 4x10 hlf. Its an older cab. But it's a " brand new floor model " The amp is rated @350 watts- 4 ohms and the cab is 400@ 4 ohms. Ran it for two hours on the setting that's in the pics. It sounded fine but the clipping light was coming on so I backed off the gain until it stopped and went on about my business. Everything sounded great, no distortion, super loud jamming with a drummer. Now that I'm home it stinks. Not bad just a slight odor. And it still sounds fine. Not like burning electronics. If you've ever worked in a kitchen and had to "burn off" a new oven or stove, that's what it smells like. Do amps/cabs do this? Did I blow something up or if this a normal break in smell?