I picked this combo up free thanks to craigslist. The previous owner could only tell me that he gradually noticed that he wasn't getting enough volume, so he increased gain (using it as a keyboard speaker for gigging) at which point it began to smoke. I pulled out the head and turned it on for about 30 seconds, I'm pretty sure it's the transformer. Where can I find parts for this? Sure, maybe I should take it to someone who knows what they're doing, thought I'd give it a shot though. Thanks.