"Psycho acoustics" is probably a much more profound subject than many people are willing to give real attention to. The SR discs appear to be discs of nothing more than carbon which as we all know is quite electrically conductive, so it wouldn't be at all surprising if placing them in the vicinity of electrical components might have some field effects. On the other hand, they may be made of the same stuff in powder form that inhabits their fuses, and I have in the past been impressed with the performance of the audio fuses especially the "Purple" ones.
It is a jungle out there. Welcome to the jungle.