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Tone pot doesn't work on my bass, it's full treble all the time and crackles if you mess with it. Does anyone know the right part for tone pot? Looks like item 16 on page three of manual? "push-pull 27k? " I looked on Sweetwater's site, and all the ones that look right say 500k or 250k. Sorry...

SWR Super Redhead problems: This thing was making a humming noise. OK fine. Got it repaired. Replaced Preamp tube, speakers, direct out section, and bunch of caps and chips. Hum is fixed. Got it home and it's sounds like a 1960's fuzz box. (DISTORTION!). I can't take it back to the shop, its a...

I just powered up this thing, after it sat for 30 years. It is making a slight humming sound. Even acoustically without the amp, when I turn on the giant power switch, I can hear the power supply(?) humming inside it, kind of like a florescent light (ballast) sound? The power cord is 3...

I own both models. What is the difference? The Power switch has some different options on each. I want to sell one, and trying to figure out which (if any) is better for use with my 5 string bass.

I just got this amp, but not sure what's up with the input section. On my old SWR amp, the manual basically says to turn the input up until it barely clips (light blinks) on your loudest notes. It also says clipping won't hurt the preamp. Should I operate the GK amp in the same way? When I crank...

Hello All, I play a (passive) Fender RB-5 Jazz Bass, mostly through a SWR Super Redhead 350w 2x10 combo which has a gain (pre-amp?) and a master volume. So that's what I'm used to. Unlike most amps I've seen, this Fender doesn't have a gain, but there is a gain in the overdrive section...