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How to shield a tempest?

Discussion in 'Home Theater Projects' started by Aaron_Morris, Oct 5, 2003.

  1. Aaron_Morris

    Aaron_Morris Well-Known Member

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    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.
     
  2. ThomasW

    ThomasW Well-Known Member

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    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. Frank Carter

    Frank Carter Well-Known Member

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    Where can one find sheet metal to do this?
     
  4. ThomasW

    ThomasW Well-Known Member

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  5. John_MackieBass

    John_MackieBass Well-Known Member

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    OMG...that box is gonna weigh SOOOO much!!! [​IMG]
     
  6. David Giesbrecht

    David Giesbrecht Well-Known Member

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    Weight works in your favour, that box isn't go'n nowhere[​IMG]
     
  7. Brian-Nu

    Brian-Nu Member

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    How are you gonna lift it?
     
  8. John_MackieBass

    John_MackieBass Well-Known Member

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    crane [​IMG]

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

    Anthony_I Well-Known Member

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    The good thing about weight..... if someone robs your house, your sub aint goin nowhere [​IMG] lol
     
  10. Chris Tsutsui

    Chris Tsutsui Well-Known Member

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    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. Richard Little

    Richard Little Well-Known Member

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  12. John_MackieBass

    John_MackieBass Well-Known Member

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    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" [​IMG]

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

    Aaron_Morris Well-Known Member

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    Ok, thanks for the replies even if some are a bit off topic. [​IMG] 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?
     

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