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[Tell] me how to I prevent insane RF interference in computer speakers?
Last night, I set up my computer in my new house, and all was well. Everything worked fine. Today I get home, boot up the computer and BAM am hit with the nearly crystal clear sound of a radio station. The interference was from an AM station, was louder than the music from my computer, and was extremely annoying.
Interference did not vary much as I changed the speaker volume
Interference was very clearly audible with the computer off, and unplugged
Interference was loudest when the speaker cable was plugged into the computer
Interference was limited when plugged into my unplugged laptop
There seemed to be very little interference if I used unamplified speakers (my headphones)
If I shorted the phono plug just right, it would get really loud interference
The radio tower is really close to my house; like maybe 4-5 city blocks
Wrapping cables in tin foil / attaching ferrite rings to the speaker cables seemed to do nothing at all (or make it worse!)
Another crappy speaker set that I have seemed to not have this problem
Everything is plugged into an APC battery backup, and that into a grounded outlet. The speakers do not have a grounding line, the PC, of course, does.
I'm in this house for at least two years, so I need a solution. I'm going to go batshit nuts if my system gets horrible interference for the rest of my time here, as I use it often. Is there something I can do to these speakers to fix the problem? Is there something I can do to the PC to ground the audio jacks better?
The radio tower seems to be off at the moment, as the speakers are working fine. Tomorrow, no doubt, it will be on again. When that happens I'll plug my speakers into the backup and run it off battery only; I will see if the problem persists. Any advice would be appreciated before I get all stabby about this.
Also, when I say "interference" I don't mean a slight hiss. I mean that I can clearly hear the radio from another room in the house. It's loud; it plays at the volume I would set the speakers to if I wanted to listen to music.