Found this recent interview on Stereophile. At minute 28:00 they addressed the RF distortion picking up by cables like speaker, AC other cables acting as an antenna causing a Amp sounding different because of RF distortion. Knowing this problem will be here for the unforeseeable future (think of powerfull wifi routers signals etc) they suggest you have to develop gear such it has a minimal influence on the measurements an eventually sound. They even suggest that because of this RF phenomenon amp's for instance could sound different not because where cables made from (silver OFC copper etc ) but because of RF interference which could explain the cable snake oil phenomenon. Found it a quite interesting interview.
Does my cable tray qualify for a RF antenna
Does my cable tray qualify for a RF antenna
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