Hows it going, Just been doing a bit of home playing, not too loud, and all of a sudden there was a kind of a low background crackle/hiss/weirdness from my cab. I did a bit of investigation, changed the cab, the speakon, removed the effects from infront, muted the amp, disconnected the lead.....it was still there - even muted!! Playing with the controls on the front, turning the "Volume" right down on the preamp, it disappears. Does anyone know what this means? It kinda comes and goes for periods, but I'm a bit concerned about my amp!! thanks for any assists, and I know genz cruise round here so anything from agedhorse and the crew would be great. Thanks!!