- Jul 9, 2007
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The other day I had an issue with a loud high-pitched hum coming through my stereo speakers whenever my TV was on - I solved it by un-tangling the mains cables for my power amps and TV, and un-plugging and re-plugging them. Today I noticed a quiter but still audible hub through my speakers when everything other than my stereo components were off, and realised it was because the interconnect between my pre and 1st power amp was near the extension block, and by moving it away slightly the hum stopped. I guess that calls the effectiveness of the screening in the cable in to question (Chord Chorus 2).
Anyway all this got me thinking - it's impossible to keep everything tidy behind my system (and most peoples I would have thought), and what is the cumulative effect of the inteference between the dozens of cables in an average system? I was thinking of just laying something on top of the mains extensions to block any EM fields affecting the signal cables - what would be the best material to use? I was thinking perhaps some kind of metallicised fabric, like the stuff some ironing board covers are made out of - would that be an effective screen?
Or is it simply the case that if you can't hear audible inteference, than there is none, and there's nothing to worry about?
Anyway all this got me thinking - it's impossible to keep everything tidy behind my system (and most peoples I would have thought), and what is the cumulative effect of the inteference between the dozens of cables in an average system? I was thinking of just laying something on top of the mains extensions to block any EM fields affecting the signal cables - what would be the best material to use? I was thinking perhaps some kind of metallicised fabric, like the stuff some ironing board covers are made out of - would that be an effective screen?
Or is it simply the case that if you can't hear audible inteference, than there is none, and there's nothing to worry about?