Hey guys, I have been practicing with my band and we've noticed a strange smell and we think its coming from my gear. It kinda smells like electrical burning but im not too positive. I have the PF-500 head by ampeg and the 4x10 hlf cab. The head is rated 500w rms and the cab is rated 400rms it only happens when i turn it past half'ish way. dunno what it is or whats causing it. any ideas? also....every now and then when its past half way i sometimes lose power for a half second or so.