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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Shielding Speakers posted by Mike on May 23, 2000 at 03:17:43:
Mike wrote:Just brought a larger TV and I'm getting some colour distortion from the speakers, which are about 1 foot either side. Is there some kind of material I can buy to protect the TV or to stop the magnetic field from the speakers?
First, ignore Paul's post about the aluminum foil. That's just nonsense (though I hear aluminum foil hats work quite well at preventing the aliens from transmitting to the receivers they have implanted in our brains).
Basically you have two options; move your current speakers farther away from the TV, or buy new speakers which use "shielded" drivers that are intended for use in A/V systems.
I put shielded in quotes because "shielded" speakers aren't simply shielded. They typically include what's called a "bucking magnet" which is a magnet that is virtually the same as the magnet used for the speaker itself that's glued onto the back of that magnet but backwards so that the fields from the two magnets cancel. Then that magnet assembly is often covered by a can made of some high-permeability material such as MuMetal to help reduce the residual magnetic field a bit more.
But the bottom line is that there's really not much an end-user can do with regard to magnetic shielding of loudspeakers. Even if you were to place a sheet of MuMetal (let alone aluminum foil) between your speakers and your TV, its effect would be minimal. It really requires a bucking magnet built into the driver itself to significantly reduce the radiated magnetic fields from a typical loudspeaker.
se
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Follow Ups
- Re: Shielding Speakers - Steve Eddy 10:43:04 05/23/00 (1)
- hmm - PAUL 20:44:33 05/27/00 (0)
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