Originally Posted by agedhorse
It's possible that you damaged the output muting circuit on your amp, the speaker plug shell is not at ground (as the input is). There is circuitry within the amp to protect (for safety reasons) but it's possible under some circumstances to cause functional damage. If you want to PM me, I can help you get it taken care of.
Thank you so much for your reply. I really didn't expect to hear from GB so quickly during holiday! I have PM'ed you.
Yes, it does sounds like it. I was surpised that the speaker cable shell is actually one of the speaker terminal. I have now put a heat shrink around it to avoid the same problem happening again.
Bummer, I am going to have a jamming session tomorrow ...