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
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