I've noticed recently that sometimes, not always, it will become quieter and quieter over the space of a few minutes, until it reaches the point that it's as loud at 6 on the volume knob as it was at 2 a few minutes before. Oddly, this usually happens when I have the Jap Epi plugged into it, although I think this is coincidence.
Anyone have any idea what's going on?
Thanks!