The Amp Garage

Thanks for the replies. Yes the amp is active when no guitar plugged in - hisses as more as you turn up the volume(s). In fact I noticed today that it feedbacks slightly on the TMB channel (shrill microphonic) if it is dimed even with no guitar which kind of surprised me. Any suggestions on what mig...

Is it normal on an 18 watt TMB (Ceriatone layout) that with a guitar plugged into normal input, adjusting the TMB master volume will affect hiss on that channel, and vice versa, when I am in the TMB input, dialing up the Normal volume will affect the noise? Not using a jumper cable, I am literally p...