[Skler]

I hear TV horizontal oscillators on every guitar amp I've
ever hooked up at my house and the EMI isn't getting in through the power
line or power supply, but through the amp's input.


Actually, seems like I remember TV horizontals get into stuff in a number of
ways, with high gain stages without sufficient shielding being the most
common. Most of the time the EMI that gets in through audio output stages is
at such a low level that it's inaudible, especially with any signal going
through the system.

S