Boxes with multiple PR's?

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  • Bent
    Super Senior Member
    • Sep 2003
    • 1570

    Boxes with multiple PR's?

    Hey all.
    When a subwoofer box is built with 2 (or more) PR's, how much of an effect does variances between the PR's have on the performance of the sub?

    I ask, because I can only picture massive headaches trying to perfectly match two passive radiators so they have identical operating characteristics.

    If they are even a little bit different, wouldn't that translate more into the PR's "talking" to each other, and a lot less of them "listening" to the driver?
  • ThomasW
    Moderator Emeritus
    • Aug 2000
    • 10934

    #2
    Mass loading PR's certainly isn't rocket science. Some retailers will load PR's for a minimal fee. Otherwise one needs a postal/kitchen scale.

    To check box tuning only takes a digital multimeter and a power resistor.

    BTW PR's don't have to be 'perfectly' matched. Like any vented system there's roughly a 10% fudge factor with PR's




    theAudioWorx
    Klone-Audio

    IB subwoofer FAQ page


    "Complicated equipment and light reflectors and various other items of hardware are enough, to my mind, to prevent the birdie from coming out." ...... Henri Cartier-Bresson

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    • Andrew Pratt
      Moderator Emeritus
      • Aug 2000
      • 16507

      #3
      hmmm I like fudge :eating:




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