So, I'm playing my second show back in 10 months with my band at the weekend, head is working beautifully, get it right up to the end of the set, take my bass off my shoulders, make it face the cab and get this collosal low end feedback which sounds great, then just as I'm about to turn it off, it dies. The whole gig, I'm running the master at 3 and at the end, someone has turned the master up to 10 without me noticing. it was a floor space show with people standing all around me). so basically what has happened? symptoms are... A Very thin distorted and quiet signal passing through but that is it. The amp still turns on and comes off of standby completely fine without blowing fuses, and al the valves light up normally, the fan still comes on, but nothing. I plugged my guitarists head into my 8x10 and its not the cab that is broken. The head is already at the techs place, but just wondering if anyone has had this problem before? He thought it was very strange. Thanks.