Sound Garage Tales

Well after suspecting the speaker, then the casters on the cabinet, I zeroed in on the back panel. And yes, indeed the buzz source was coming from there.
It seems like the closed-back structure and small debth (9″) was contributing to bring that back panel buzz to surface, thing that usually does not happen on a open-back cabinet.
I solved this one with using a convertible back as I have on my 2×12 Slant cabinets. The two braces that join the three-pieced structure reinforces the whole back panel system so that it keeps everything snug and no unwanted vibrations or buzzes occur.

Yes, the amp was fine. The culprit was the 1×12″ cabinet. Something with the speaker or at least a rattle of some sort that resonates with that “G” note.
He will drop it off this week to take a look.
So yes in the end – the amp was just fine.
I guess we’ll have to go through the reverse-troubleshooting process next time: from speaker backwards.
Actually – that wouldn’t be relevant in a case where the guitar cable is bad. Hmm…

It happens sometimes that some amps just have this buzz or noise on only certain lower notes. For example I had a local customer calling in telling me of this certain noise when he was hitting the G or G# on the lower string. So I had him bring in his amp for a check.
Funny thing is that I played it and didn’t hear that yesterday. There was however a different setting. He has a 1×12 cabinet with a Celestion Blue, and I tried it through a 1×12″ with a Greenback, using my LP.
Will try it later today with a Blue also. Things like these are harder to track down and they can be cured hopefully by just replacing the tubes. We’ll see…