1 Hipbone 2 months ago I have a Vox AC 10 that I have 15-20 gigs on.It has started to develop an issue. It cuts out toward the end of a gig. It seems the sound will kinda sag into silence. Seems to do it when I run it hard. Any ideas? I took a look at the tubes and they look fine as far as I can tell. The heaters glown and when I Tap on them no strange sounds. One of the speaker wires my have been loose. It was off when I opened up the back. Not sure if it happened taking the back off?