For some reason my Mesa M-Pulse has been gradually getting quieter. At first I thought it was the dodgy electricity in my back rehearsal room but I moved it last night and it's quieter still. I was trying a few things before coming to work and was sitting in front of it- volume cranked, still quiet. 3 weeks ago this amp was carrying the bass in a loud-ish 100 person gig up against a band running through a full PA.
Anyone got any clues what it might be? I have recently swapped the tubes (one was microphonic) - so they are both new. Maybe one is bad?? The sound is fine. Not distorted unless I crank the gain.
I have a few things to try - clean the vol pot - it WAS scratchy, doesn't seem to be now. Swap the tubes around - I have one good one spare. The crappy thing is I have a gig tonight and sound check almost straight after work
...oh and I'm playing through an efficient Berg quad.