Midwest Audio Fest

It’s that time audio enthusiasts! Registration for the 2019 Speaker Design Competition is now open! Visit for details and to list your speaker project. We are excited to see all returning participants, and look forward to meeting some new designers this year, as well! Be sure your plans include a visit to the Parts Express Tent Sale for the lowest prices of the year, and the Audio Swap Meet where you can buy and trade with other audio fans. We hope to see you this summer! Vivian and Jill
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Not seen this topic before. Space back of driver to back of cabinet. Not wall

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  • Not seen this topic before. Space back of driver to back of cabinet. Not wall

    Of course, they have the money custom design drivers. Not sure if stock drivers would work with so little depth. It's why I ask?
    Just another hobbyiest.

  • #2
    An on-wall speaker should have as shallow a cabinet as possible, to place the null frequency from Allison Effect as high as possible. Ideally the cab would be wide enough so that the baffle step would occur at a low enough frequency that there is no Allison Effect.


    • #3
      Easy rule of thumb:

      If the pole piece is vented try to allow as much space as the pole vent diameter from the back wall. IE: 1/2" diameter pole vent, space the woofer 1/2" from the cabinet wall. Same rules apply to port tubes.

      If the pole piece is not vented then no, it does not matter how close it is.
      Your results may vary.


      • #4
        If you are concerned with minimizing the reflection of the backwave through the cone, more absorbing insulation can be used as you increase cabinet depth. Types and thickness (ie. depth) of insulation would vary with the frequencies you are trying to attenuate.