The amp is a six month old Line 6 Spider II 15. I don't think the amp could be the problem but I don't know. It hasn't been mishandled or had anything spilled on it or anything. I'm guessing it has to be the outlet. Which if that's the case I really won't worry about getting a shock from Betsy but moreso my house burning down around me. :eek: I guess 50-60 year old wiring probably isn't up to par these days. Could the problem just be the one outlet? I'm gonna get the outlet checker you mentioned to be sure. Thanks LATS.