Its the first generation 400RB, 200 Watts. I used it at a show and someone had the powerstrip plugged into a ground lift. I got zapped by my amp and it hasn't worked right since. If the amp is plugged into a cab it makes horrible and very loud pops. Plugging a bass into the input jack does nothing, no sound at all. However, if I plug it into the effects return I can get a little sound out of the cab, but its muffled, soft, and filled with fuz and pops. I took off the top of it and I didn't see any obvious burned areas. Also the fuses are fine. I really don't want to throw it away... I'd like to get it fixed but I'm afraid it would cost more than the amp is worth. I have a SWR bass 750 now that I use during performance but I loved the tone out of that GK and I could find lots of uses out of it. Any suggestions?