Audiphile cable and power conditioner makers often market that their products help reject EMI and RF interference. Is it really something we need to worry about for audio? Aside from audio, I'm also wondering about any health affects from EMF from say a small in-wall breaker box in the same...

I've always suffered from sensitivity to electrical fields. For example, I can't use telephones because if I put a telephone to my head I get a nasty pain after a few minutes. My problem's never been too bad with headphones and earbuds, and over the last ten years or so I've been very...