Steve
After playing this amp for a bit, the reverb starts to make a buzzing noise. If you turn the reverb off it goes away, but if you give the amp a slight tap or hit, it starts to make an awful rumble noise and the buzzing goes away also. Then after 5 minutes or so the buzzing is back again.
Any ideas? It seems to be a reverb issue, the amp is pretty quiet otherwise.
Also when you turn on the trem-vib effect, the overall volume decreases and gets a little muffled.