Interference with CRT Monitors?

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GTP_event / kevinr6287 (farming account)
Are there any computer equipment that you shouldn't keep next to a CRT monitor? My brother told me you should'nt keep speakers by a CRT. They eityher interfere with the monitor or the monitor interferes with them. The reason I ask is that I just bought speakers that are worth keeping and I don't want for them to break down or for them to damage my monitor.
 
Most systems designed for computers are "shielded" (it should say somewhere on the speaker...near the UL certification), which means that you can keep them near a CRT. Other, non-computer speakers will damage the CRT (or at the very least distort the image) due to the strong magnets inside the speaker.
 
I have my Creative 5.1 speakers quite near to my moniter (including my subwoofers) and they haven't interefered with anything on my moniter. And the setup has been there for quite a few years.
 
Uninterruptable Power Supplies (AKA Battery backups) should be kept away from monitors. I have two near mine and they are causing my monitors to flicker. I really need to move them.
 
If you're curious about what speakers or other electronic devices with magnets in them can do to a monitor, simply hold one up to the screen - BUT NOT FOR LONG. You'll see the picture distort and discolor.

I'm not exactly sure of the science behind it, but it's an electromagnetic interfierence. Which, if prolonged, can permanently damage the display. I've seen it done on a few televisions.
 
LoudMusic
I'm not exactly sure of the science behind it, but it's an electromagnetic interfierence. Which, if prolonged, can permanently damage the display. I've seen it done on a few televisions.
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The CRT works by shooting a highly accurate beam of charged particles at phosphors on the screen--causing them to glow red, green, or blue. A strong magnet will change the path of the particles, making them hit the wrong spot/wrong color.

I think the damage occurs because there is a very accurate "grid" that defines the pixels and keeps neighboring ones from glowing. If the particle beam hits this mesh for too long, it'll damage it.
 

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