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How to shield a tempest?


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12 replies to this topic

#1 of 13 Aaron_Morris

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Posted October 05 2003 - 02:40 PM

I am looking to put a tempest in an enclosure directly below my TV. How would I go about magnetically shield the enclosure? I am figuring a bucking magnet and maybe some sheet metal on the top of the enclosure. What size magnet would I need?

Thanks for the input guys.
There are 10 kinds of people in this world, those who understand binary and those who don't.

#2 of 13 ThomasW

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Posted October 05 2003 - 03:02 PM

The bucking magnet should be no larger than 50% of the weight of the original magnet on the driver.

Line the ALL interior surfaces of the cab with the thickest sheet metal you can find.

On occasion we've done a double walled cab with sheet metal layer between the two layers of MDF/plywood, then a second layer of metal covering all the internal surfaces of the cab.

#3 of 13 Frank Carter

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Posted October 05 2003 - 03:12 PM

Where can one find sheet metal to do this?

#4 of 13 ThomasW

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Posted October 05 2003 - 03:15 PM

yellow pages..

#5 of 13 John_MackieBass

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Posted October 05 2003 - 05:19 PM

OMG...that box is gonna weigh SOOOO much!!! Posted Image

#6 of 13 David Giesbrecht

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Posted October 05 2003 - 05:58 PM

Weight works in your favour, that box isn't go'n nowherePosted Image

#7 of 13 Brian-Nu

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Posted October 05 2003 - 06:04 PM

How are you gonna lift it?

#8 of 13 John_MackieBass

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Posted October 06 2003 - 03:45 AM

crane Posted Image

I'm not one to complain...mine weighs 200lbs!!! Although the driver is a solid 57lbs :b

#9 of 13 Anthony_I

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Posted October 06 2003 - 06:24 AM

The good thing about weight..... if someone robs your house, your sub aint goin nowhere Posted Image lol

#10 of 13 Chris Tsutsui

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Posted October 06 2003 - 09:58 AM

As for the sheet metal, make sure it is ferromagnetic. If you use aluminum or stainless steel, it ain't gonna do anything for your shielding. You need something with iron... such as steel. (Rust is an indicator that it'll work)

A bucking magnet, plus lining the inner cabinet with some sheet metal would work fine. I think 12ga would be the absolute thickest. The distance from the magnet to the tv matters as well.


#11 of 13 Richard Little

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Posted October 06 2003 - 10:44 AM

Quote:
The good thing about weight..... if someone robs your house, your sub aint goin nowhere lol
or maybe you'll find a couple of robbers with thrown backs, laid out on the floor.Posted Image
I wonder how close is to close for tempest or AV15's in just normal enclosures.

#12 of 13 John_MackieBass

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Posted October 06 2003 - 01:59 PM

omg, if someone was going to rob me that box would be the LAST thing they'd get!!! They would lift up on the front and say "screw it i'm taking the VCR" Posted Image

Bucking magnets...is that just a magnet attached to the back side of the speaker to negate the magnetic field of the speaker?

#13 of 13 Aaron_Morris

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Posted October 06 2003 - 03:25 PM

Ok, thanks for the replies even if some are a bit off topic. Posted Image For the sheetmetal, I was thinking of using some roll flashing or something similar, is this thinking on the right track? Where would I get the bucking magnet, partsexpress or mcm, or someplace like that?
There are 10 kinds of people in this world, those who understand binary and those who don't.