Video Shielding

We had a problem with out monitor at work with it backing up to speakers in the next rooms wall and we took some old VCR housing bottoms and screwed them to the wall behind the speakers and it worked. You cannot allow the magnet of the speaker to hit the metal or it won't work. You might have to play with placement some too. Even though the plates had small ventilation holes in them it still worked (it didn't need to be a solid sheet).

Jim

Using sheet steel and/or iron sheets between your monitor and speakers will deflect the magnetic field. The thicker hte sheets the more effective the material will be at shielding. If you don't mind doing a bit of extra labor, you can use two thinner sheets of steel and give them about a 1/8" gap between the sheets. The sheet closer to the subs will deflect the magnetic field and the second sheet will compress the resulting field further shielding it.

(Science Warning; nothing practical for use)

Extreme1 also brought up a good point. What type of screen is it ?.

As far as mu-metal/Schmu-metal and luck, heres another lucky experiment I just did using a triangle shaped magnet used in fabrication of tube chassis and for body work and a plain old piece of sheet steel bought at the local hardware store. The magnet was so close to the metal plate that it stuck to it. 

http://rides.webshots.com/photo/2857743330049730488dbiOsF

Jim

For example, here is a magnet without any shielding or whatever.

Using a superconductor of some sort, the field is fully repelled.

Now sheet steel contains iron which helps to absorb and deflect magnetic waves.

With most subs, the field is already distorted deeper into the subwoofer via the

Now mj239air didn't say if the television is LCD, CRT, or plasma.

If it is an LCD, then shielding isn't required, but recommended (just one sheet) at least on the back side of it. Get the sides covered too if you can.

CRT's WILL need shielding for it, the electron guns inside it work by making their own magnetic field that makes the electrons go to the appropriate location on the phosphorus (screen).

Plasmas will need shielding just on their backsides. Most are usually already built with some shielding in it but the shielding tends to get thin on the back of them. The kickback for the plasma though is that they become susceptable to elevation changes, particularly above 8,000 ft. The thinner air has been known (and recorded) to pop the filaments in the screen. This isn't as big an issue in top series of many brand names (such as pioneer elite [drools] and mitsubishi's PD series of plasmas) but lower valued plasmas tend to be vulnerable to this flaw.

If any of the signal wires for the video runs within 18" of the subs, then recommend getting them shielded, or better yet, rerouted around the subs and their fields. If you ahve to shield, using braided line covers made of steel will work beautifully and give the wiring a trick look to it.

Ya man, after reading the first post in this thread I was scratching my head, asking my self why this was even being asked.