Originally Posted by
FighterHayabusa
Unless you are running 1250000 meters of speaker cable (1/4 wavelength of 60 Hz if the web page caclulator was correct) you've not got a very goot antenna for 60 Hz. The 120 Hz rectified is going to be far louder from your power supply.
DC? (what you get from rectified AC)...not an issue..
Forget the EE calculations..power isn't being used in an RF fashion.
Think grounding circuitry,proximity induction and you'll get the hum.
Sound engineers understand such.