Tried to search the forum for a previous post related to my prob, sorry its not that clear where all the old posts went.

So last last night I'm plating the showroom at Casino AZ and I'm working my wah pedal when crack.. crackle pop I lose most of my sound.  The amp's not being moved it just quits on me. Checked the power tubes and the one preamp tube I can see are still glowing,  Reset speaker cable, cycled power no bueno. The amp sounds fine its just at vol = 50% its just a whisper of its former self.  Help!!!  thanks in advance .  Scott