I play an Eden World Tour 800C through and Eden 410xlt cab. Today at a festival gig, I set up my rig like any other day, plugged in, and began playing when the soundboard asked to get a level. All of the sudden my signal disappeared, then came back. This kept happening. Eventually I noticed that all lights on the head remained on EXCEPT the little green dc indicator. This would turn off when my signal disappeared (which i have never seen before). Also, when turning the amp off, the speakers would jolt forward as though I were yanking the live cable from my bass. Keep in mind, we were running on a schedule so it was quite stressful as the mc was ready to announce us, etc.. Then it got really bad. Smoke began pouring out through the the top of the cab. All I did was plug in like any other gig! Now I fear my cab is torched...Later, I plugged in the head at home and it seemed fine. When I connected it to the cab though, the speakers jolted forward and hummed very loud. Only thing I can guess is bad electricity at the festival? I wonder because during this nightmare, a bassist from another band offered my his amp. I plugged it in to the same power source as mine, and it would not turn on....any advice or thoughts on this would be greatly appreciated.