Schumann Resonance... we visited this recently, so there's another thread somewhere.
IIRC, it looked as if it might just affect the listener, and, if one affects the listener, one affects the perception of the sound. Many of our members might find a measure of Scotch to be an effective audio gizmo, and, can we deny their experience? Of course not! :lol:
So by that token, why waste money on expensive gears, when all you need is to buy booze of your liking to make your current audio gizmo's sound sublime???