last time I used my amp, it worked fine . Now I get nothing. All the lights come on, all fuses are good, yet the speaker outs don't send a signal. Here's the confusing part, the head doesn't power the speakers in the cab and an external power amp won't power the the speakers either. And the cab head doesn't power an external speaker. Any advice would be helpful, thanks.

Mike, September 2009

my I/4 speaker plug in from my 2 10 speakers to back of amp cuts out at times unless i put upward pressure on it by taping it how to fix

claude taylor, December 2010