This may be a repeat post- sorry, new to this site.
I am an advanced novice and purchased the Peavey Studio Pro 112 ( no tubes).
I notice an ongoing HUMMMMM whenever I power it on, only minimally affected by switches on high gain and persists even when supersat is cranked down.
Is this a problem with all solid state amps?? I also noticede it on a loer end new Roland cube.
I have to admit the sound is driving me crazy;however once cranked up to playing settings, not so not so noticeable. I bought some new cables...have not used them yet.
Any ideas, or is this the way these soid state amps crank on???