I might be losing my mind, but I'm pretty sure something is rotten in Denmark when it comes to my GK 2001RB. I won't lie -- I don't know a lot about amps, and I bought this amp at a time in my life when I happened to have the cash to buy a big amp. So I went out and bought the biggest I could get with the belief that I'd never need to buy another. I was only 22 at the time; needless to say I couldn't afford this thing now, but I already have it, so I'm stuck with it for the time being. Here's the issue: I feel like the tone is just dreadful. Lifeless, can't get a decent warm sound for the life of me, and when I do it's just giant mush, with no cut-through whatsoever. If i try boosting the mids the sound just gets hideous... no warmth at all, lot of honk. Just not pretty. And on top of that when I switch to the overdrive channel I can't get the level of that channel even a quarter as loud as the clean channel. Even if I boost the gain and Level B all the way I get a really thick, murky, overdriven sound that's still pretty dang quiet. The amp had some issues when i first bought it back in '03. I eventually determined that the issue was a faulty speakon cable (i could only hear the tweeter, and just barely) so with another GK speakon I managed to get her ship-shape, though something still felt a bit off. The amp would overload occasionally when I was just practicing in my bedroom at low volume. It hasn't done that in a few years, but it's always made me nervous. And now I'm way out of warranty... Anyone have an idea of what I should do? I dropped an email to GK and haven't heard back yet... I suspect I should take it in to a repair shop, but I have a gig friday and even if the amp sounds horrible I need to play through something. (We have 3-5 more lined up in the next few weeks as well...) Also, something I wondered was could this be an electrical current problem? Most of the time I'm playing it at practice and admittedly i don't know how strong the current is there. We played one show where the amp sounded great (i just assumed it was good acoustics) and another show where it sounded terrible. And advice would be GREATLY appreciated, thanks!