ieales
I’m sorry that you don’t have any details on the listening test:
Nothing is completely passive ... Pull apart a switch and examine the contacts. One set may have a contaminants/wear/geometry that the other does not.A mechanical switch is a passive component.
I’m sorry that you don’t have any details on the listening test:
... state of the art LA recording studio. Participants were well regarded engineers and IIRC, some industry sales reps. Source was hot-rodded ATR-102 ½" master tape feeding Bryston amp stack and time aligned studio monitors. Test was change or no change. Blind.Without details, your claim really doesn’t mean much, except perhaps to you.