how close can magnets be to one another?
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=97507
Printed Date: May 04, 2024 at 9:53 AM
Topic: how close can magnets be to one another?
Posted By: afholderman
Subject: how close can magnets be to one another?
Date Posted: September 28, 2007 at 10:22 AM
I was looking to my subwoofer in such a fashion as the magnet would only be about 4 inches from the magnet of one of the 6x9"s hanging from my rear deck. Will this present any problems with this setup or do the magnetic fields not affect one another?
Replies:
Posted By: audioman2007
Date Posted: September 28, 2007 at 11:48 AM
I honestly am not sure if they will affect each other. I wouldnt think it would not affect eachother since subwoofers are put close to each other in some installations without dividers. But if you are worried about it, just simply put a divider or put each speaker in a box than mount it to your deck.
Posted By: DYohn
Date Posted: September 28, 2007 at 12:05 PM
Your setup should not be a problem. ------------- Support the12volt.com
Posted By: afholderman
Date Posted: September 28, 2007 at 4:39 PM
Thanks for the help, I just wanted to make sure that nothing would be hurt.
Posted By: stevdart
Date Posted: September 29, 2007 at 1:36 AM
To give you a clear picture of how magnetic fields interact, look at the 90 degree rule: that two magnetic fields that are opposed at ninety degrees have the least interaction. So, for example, if your sub is facing outwards in the normal fashion and the coaxial is facing straight up, the two magnets would be opposed by ninety degrees. Get several inches away from each other and it doesn't matter. These three coils are each 90 degrees from the other two coils: 
------------- Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: haemphyst
Date Posted: September 29, 2007 at 7:23 AM
That's true, stevdart, but in the case of a static magnetic field, such as that in which a loudspeaker's voicecoil is immersed, interaction won't have any effect on the other driver whatsoever, whether the fields are right on top of each other or not.
In the case of a dynamic field, like those of a coil in a crossover, and the fact that an external magnetic field will change the value of the coil, (and it will change - dynamically, altering the values - dynamically, introducing distortions - dynamically) it is vital that the coils be placed the way you have shown them.
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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: stevdart
Date Posted: September 29, 2007 at 8:16 AM
Good to know, haemph. Thanks!
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
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