Ferrite install on appliances AC cable

If you want to get technical about it, a bunch of very small ferrite beads, teeny tiny ferrites, located around the room, primarily along the 90 degree angles where walls meet walls and where walls meet the ceiling, every coupla feet, does wonders for the sound. Been there, done that. Thimk outside the box.

https://www.google.com/search?q=ferrite+cable&safe=off&source=lnms&tbm=isch&sa=X&ved=0ahUKEwilp_GGob7gAhWOrFkKHWXHBl0Q_AUIDygC&biw=1745&bih=803

elizabeth, It's a shame that I can not see a photo to capture your idea.

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. 

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

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

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.

I've tried ferrite "circles" around appliances, including the refrigerator. Didn't have any effect on the audio system. However, that was years ago and the system is way more revealing now. I still have the ferrite thingies ... maybe I'll try them again. 

Frank