:idea: I have owned a 112 Plus it had a semilar problem I cleaned the Volume, mid , and Reverb Pots and 80% of the hum and noise went away. I now have a Stage 112 SE and it as had the same problem, and this fix worked on it to, this helped clear up the sound also. Hope this helps you out.
kgambler44 - thanks so much for the reply. I'll have to try that. Can you recommend a pot cleaner? I know enuf not to use WD40 - but I don't know what kinda electronics /potentiomerter cleaner spray to use. Years ago I used some teflon spray on an old Gorilla amp I had, and it worked well, totally cleaned the noise out of the pots, but I think there must be a better cleaner out there. Can I find something at Stew-Mac? Please let me know, and again, thanks!