The AM interference thing is that the high-frequency noise that the amp's switching puts out, can affect nearby radio receivers (ie. your radio will possibly pick up the "hash" from your amp louder than the radio stations in that range), not the other way around 
Going much higher in frequency with these amps, from what i've read, only puts out more heat, and that's about it.
Going much higher in frequency with these amps, from what i've read, only puts out more heat, and that's about it.
That's right , The amp is the one that will parasite the radio ,this why 450khz is the best as it lies outside the broadcasting bands . In late 70's I tried the class D circuit running at 100khz from Hitachi mosfet data book . It was ok as portable guitar amp on battery , but for music ,it was horrible. The reason I understood by then was the PWM frequency is too low . I never got interested with this type of amp until today , as I read 1.2Mhz on TPA 3116d2 datasheet.
On Ali I found for 2.75$ shipment included mono 100w configuration board . I will try it by myself .
On Ali I found for 2.75$ shipment included mono 100w configuration board . I will try it by myself .
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