Help with AC noise please


Hi all, I have a dedicated AC line for my audio, Monster 5100 filter, Quantum symphony conditioner, Nordost Red Dawn interconnects, MIT T2 biwire cables(15'), MF cdpre24, PS audio amp, MF tube buffer, Emminent Tech speakers,
When I put ear close to the speakers I can hear what sounds like something frying in a pan, sort of a crackling sound. It is louder through the left speaker than the right. To make things worse for about two days the left speaker was absolutely silent, with the right speaker only emitting the noise very lightly. I have removed, and relocated all the devices but when the noise is present it stays. I tried rerouting the cable, even lifting them up off the concrete basement floor, but no help. I unplugged the tube buffer, no help. All the equipment is mounted on a verticl rack. I have moved the tube buffer away from the rack. Even with all the lights out I still have it. But then sometimes I don't. When the noise is gone I tried to discern what was different but could not. Does anyone have any ideas? Thanks
dougm

Showing 2 responses by newbee

Sounds like you are hearing a noisy tube, or the noise floor of your tube buffer. I'll bet if you take it out of the circuit the noise will go away.
Dougm, Sounds like taking the buffer out didn't make a difference. I can't tell from your post if you have done this yet, but if not....Disconnect everything in your system (cables and IC's) except your amp and speakers and see if you have the "sound". If you do you have at least isolated the problem to your amp and/or power. Then work backwards thru your whole system one component at a time, very methodically. For example add your preamp and IC's to amp - and listen with out turning it on. No "sound", now turn it on. Also rotate selector switch before adding Ic's from sources and listen. Repeat process until you isolate the noisy component. Then feed back.