Hi Bo. Thanks for your reply and suggested cause of the problem. I'll drag the amp off to the repair shop this week and suggest they have a look at the tube(s) for the Clean Channel gain.
I bought a JVM205C (new approx. 12 months ago). It has worked well on both its Clean and Over Drive channels up until recently. Now after playing for about 15 - 20 minutes continuously the volume seems to fade away (not totally muted but very noticeably - very similar to turning the volume down...
I've had the same experience with my Fender Player Plus Strat with Noiseless Pickups running through a Marshall JVM 205c. After setting up my music room in a different room of my house I started getting that annoying buzz/hiss that had not been happening before the relocation. My Band's Sound...