Alright guys, I picked up a used 3112 on craigslist for $250....a deal you just couldn't pass up. I've read a ton of great things about them, and thought I'd snag it and give it a shot. The guy told me that it gets this kinda crackle/static sound after it starts warming up. So here's what I've determined. There's the clean channel and the overdrive channel. This sound only occurs on the clean channel. It's not loud, just a low static kinda sound. Even when just sitting there, no guitar going through it, it will do it. So I didn't know if it could be a loose solder connection somewhere, a short in some wires, or what. Just wanted to see if I could get any responses here before I took it in to get looked at. Thanks everyone!