Hi Guys, I originally posted this query about a multi-effects pedal, but after some further investigation have found out that this fault is coming from the amplifier I have a Trace Elliot Series 6 715 100w amp, and after about 3 or 4 minutes of playing the treble suddenly fades out almost completely. Then, after a few seconds, it fades back in. This fault happens every few minutes or so, just for a few seconds at a time. Does anybody have any ideas of what might cause this and how it might be fixed? Many thanks!