Intermittent low hum/buzz

>>>You have to put your ear right up to the speakers to here it<<<

@bikeboy52 Just wondering if the noise is present, *equally*, in both the L & R channels?

>>>Tubes are noisy. They just are. I’ve tried multiple setups, but the low level noise of tube gear just drove me crazy.<<<

@geof3 Totally with you there. I couldn't take it anymore, and gave up on them years ago.

>>>Pay attention to what is in your rack, some of the hum coupled through the space between shelves from noisy amplifiers and injected it into susceptible components above and below the noise source.<<<

@spatialking I couldn't agree more. Many don't realize this until all equipment is physically placed, and *then* powered up and listened to. When setting up an audio system, I recommend starting with speakers and amplifier hooked up first (with amplifier inputs shorted), then listen for noise. After removing shorting plugs on power amp inputs, connect your pre-amp to your power amp (with one source input shorted). Listening to the shorted input, if there's no noise, continue on with the next component, and listen for noise...and so on. This many times will allow you to quickly identify and isolate which pieces of equipment are not playing nicely together. You may then have to physically move pieces of equipment and cabling to eliminate noise. While performing this staged setup, keep only equipment that has been connected, powered up. 

>>>So possibly its a shielding thing the Kimbers have none<<<

@bikeboy52 Give me a heavy braided shield (for example Belden 1505F or Blue Jeans LC-1) any day over non-shielded Kimbers. I understand Kimber's theory, but in many electrically noisy environments, Kimber RCA interconnects *just can't* reject the noise. 

@dpop Yes my noise was the same in both channels. Annoying as all get out to be in for close to 30k in equipment and have a problem like that and quite a relief to solve it. My next move probably this winter is a move much like geof3 suggested which will be to build a appropriately sized shelf with a actual equipment placement plan before hand. I was never able to do that before but I think Im done buying new gear at this point I think anyway, Best !

@bikeboy52 That "buzz" in the midrange is most likely AC line harmonics seeping in through parasitic capacitances and parasitic inductive coupling in the chassis, line cords, and developing a voltage on your shields.   You do need to get rid of it, because it is affecting your clarity and definition of the sound, even though it is at a low level.   You have your work cut out for you, it took me a long time to get rid of it in my system.