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Car speakers and their effect on TVs??

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Pasqualz:
Hi all, I've seen quite a few people use car speakers for their cabinets. Since the speaker placement is almost always above the monitor, I was wondering if anyone had issues where the speaker magnets were effecting the monitor. I don't know the name of the effect, but you know what I mean, when the monitor's colors get all out of whack. I know that most home speakers these days are magnetically shielded, but I doubt that car speakers are. So given all that, here are my questions:
1 - Are there guidelines for the distance that speaker magnets should be from a monitor?
2 - Is there a device you can place over the magnet to shield it?
3 - If the answer is to periodically degauss the monitor, how much does a good degausser cost?
4 - How often can you use the degausser?
5 - Can you use a degausser too much and ruin a monitor?

RandyT:

--- Quote from: Pasqualz on May 28, 2004, 09:10:20 pm ---1 - Are there guidelines for the distance that speaker magnets should be from a monitor?

--- End quote ---

As far away as possible.  But what you can get away with depends on the size of the magnet.


--- Quote ---2 - Is there a device you can place over the magnet to shield it?

--- End quote ---

Yes, another magnet of the same size.  The energy cancels itself out.


--- Quote ---3 - If the answer is to periodically degauss the monitor, how much does a good degausser cost?

--- End quote ---

This would get old quick.  But, plan on 40-60 dollars for a real one.


--- Quote ---4 - How often can you use the degausser?

--- End quote ---

As often as necessary.  Most, if not all modern monitors do this every time the power switch is turned on.


--- Quote ---5 - Can you use a degausser too much and ruin a monitor?

--- End quote ---

Doubtful.  See #4.


I got a chuckle when I saw how small the magnet was on the original speaker from my Defender cab.  It was about as big around as a nickel and about 1/2" tall.  I'm betting it was like that for a reason :).


RandyT

Apollo:
Shielded speakers are a dime a dozen but you don't have to put them near the monitor anyway. Mine are in the sides of my cabinet ( the lower half ).

RandyT:

--- Quote from: Apollo on May 29, 2004, 03:12:19 am ---Shielded speakers are a dime a dozen but you don't have to put them near the monitor anyway.
--- End quote ---

I agree.  If you need to put them next to your monitor, shielded is the only way to go.

But if you are looking for high power capabilities, shielded speakers will be much more expensive than stock automotive ones.

Interesting experience:

After first getting my cab together and in place, I noticed some wierd colors in one corner of the screen.  Thinking the cheap set of PC speakers I put in the machine was the culprit, I pulled them back out.  No change.

On the floor, 5-feet away from the monitor, was one of my vintage Pioneer S-910 speakers.  I moved it 6 more inches away from the machine, and the weird colors were gone.

Moral: Never underestimate the effect that a set of speakers might have on your screen.  Be sure to test the intended speakers in their intended locations before cutting the holes.  ;)

RandyT

*edit*
Grammar

Pasqualz:
So I guess the real answer here is for me to test the car speakers I am planning to use and see if they work. If they don't, then I should get sheilded speakers! It's one of those trial & error procedures. . .

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