Pretty interesting.. many class D audio amps drive at frequencies above 100-200khz, so either the odd or even harmonics of that frequency sounds like where you

Pretty interesting.. many class D audio amps drive at frequencies above 100-200khz, so either the odd or even harmonics of that frequency sounds like where you would get the actual audio content showing up in the audible band (not sure if it’s odd or even that would be the right one). I want to try this on some other class D speakers.