Loud Audible Hum/Noise from C/J Tube Amps

Thank you very much for sharing your experience. I do own other tube amps such as audio research, rouge, audible illusions, Cayin without having this problem. Zaikesman, sorry for mis-informing you about no hum when the preamp is off. That is NOT true. The hum is definitely present and louder than normal when the preamp is not in operation or in mute mode during the soft start process and gets much louder (5X) when the preamp is ready for use.

I've owned two CJ amps (and 3 of their preamps),. The Premier 12 monoblocks exhibited no hum problems at all, and I frankly don't recall any with the pair of MV75A1 amps I had way back in the 1980s, but I THINK I'd remember.

A couple years ago I bought a Hsu subwoofer amp and was surprised that it came packed with a cheater plug and directions in the owner's manual to use it if necessary. It was, and I did. Good luck, Dave

I've had 2 CJ mono pairs,still have the 8xs---no hum. Me,I would swap out the ic's.---all of 'em. Fluorescent lights, anywhere in the house can cause such things as well. I also run a very good conditioner, that be Audio Response. The only hum I want is from the backup singers.

More on this fluorescent lights thing:--I sold a member an amp I had owned for at least a year and he complained about hum/ buzz---This amp was always quiet as a church mouse in my system---It ended up being this type of lights in his house.