Hey all, My combo has this strange problem - all of a sudden it's volume dies away, until it's almost quiet. Then it stays like that for a few seconds or longer, only to rise again to it's normal level!! It's like someone would turn the volume knob. And this has happened on two occasions, i.e. two different days, but several times during that particular playing session. The first time, while at a garage, playing with the volume/gain at like 60-70%. Today it happened again, while playing bedroom volume. First I thought it was my bass, but then i changed to another and it happened again. I also changed the cord. The amp is this: http://www.hughes-and-kettner.com/products.php?mode=prod&id=44 Hughes & Kettner Quantum 412 combo. And, while typing this up, the problem seems to have gone away... for now. This is so weird.