It is possible in certain instances where electric lines are installed directly under the audio system cables where they can cause interference. When working as a recording engineer I always had a RF problem in a certain church and attributed it to a close by radio station tower. I mentioned it to the custodian of the space and he said that a main power line ran directly under where I typically placed my microphone cables. I moved them about a foot away ---- and voila !! No more problems ! If your listening room is on a slab it most likely wouldn't be the case.
Cable elevators
My Saturday hifi tweaking involved digging out the family’s box of wooden building blocks and using them to elevate my speaker cables off the floor. Previously under an area carpet on a wood floor. Mc 601s to SF Amati with Wireworld speaker cables (to be replaced with Cardas).
The result—mind you the system is playing really well right now thanks to my new Cardas interconnects—is greater clarity (I think), sound stage, and texture. This is definitely about wringing out the last ounce of the system and maybe I’m imagining the improvement. I don’t think I’d spend any money on buying risers, but what the hell why not use the old building block. Looks dopey and the family laughs at me, but dang does the system sound amazing.
Anyone else play with risers/elevators?