My amp (Mesa Studio 22) was made some time in the 80s. I don't know if it's ever had a cap job and I'm wondering if it needs one. The typical symptoms (apparently) are hum and flubby bass. I don't have either of those, but the sound is not as crisp as I remember a few years ago. Also, after I turn it off it sometimes makes a squeaky crackling followed by a few pops. I suspect that's not normal...
Any suggestions from the experts?
My DC10 is having it's caps looked at presently. I took it in for a non-functioning EQ slider, and also mentioned that it hummed like a refrigerator while on. He said he'd check out the caps.
I'm no help here, btw