Ferrite install on appliances AC cable

Ferrites are best for high frequency noise, including radio stations and other EMI/RFI.
Their best use is if you have wall warts, like for your network, or Class D amps. They are good on fluorescent lamps, but man, they can put out so much noise that it's only a slight improvement there.

Do not use on your system as they are bad for the dynamics and sound.

ebm5, Thats what someone told me, only install them on other than our music equipement 

Until I put a Ferrite core on my antenna lead to my tuner, my tuner was unlistenable with my kitchen lights on. My kitchen lights are all LEDs and must be putting out a lot of junk.