Hi, I have recently purchased a jcm2000. It’s in great condition and had its valves changed at the end of 2019. I have brought a new speaker cable which I’m running from the 16ohm head output to the 16ohm output on the 1960lead with the selector on mono. I’m not hearing any buzzing or weird noises. Everything seems fine. For some reason though I can crank the clean channel to 10 and it seems kinda quiet. Barely audible at 2-3. What could be the problem? All 4 cones are working I’m just not hearing the power that I know it has.
Hey, welcome to the forum! Sorry you’re having trouble. Where do you have your gain set? Are the other modes/channels also quiet? Or is it only clean mode that’s quiet, and you get a big jump in volume when you switch to crunch mode or the red channel?
Make sure the VPR button is out. Are either of the loops jumpered or used? Might help to know which model also TSL100/122/60 or DSL100/50 etc.
Welcome to the forum I really have no experience with your amp, but the jumping of the FX loop is something that I have to do with my 3210’s or the volume is up and down, if your amp is similar to my Dsl40c’s, going from the green clean, to crunch or red ultra, there is a significant amount of volume difference, plus what is said above me is that your gain needs to be up or not much will come through. Hope you get it sorted out... Cheers Mitch
Hi, try to plug your guitar directly in the fx loop (in the return input). If you hear the power the amp can produce it is a preamplifier problem. Just give a try! Bye
