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Thread: enclosure magic

  1. #1
    hector.murray
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    enclosure magic

    I have some questions regarding enclosure design.
    I have noticed that for a given driver in a series of enclosure designs, that, while maintaining Fb, while increasing Vb and keeping a circular port diameter constant, port length decreases.
    For example
    LE10A
    Fb 32Hz
    Vb 1.6 cu ft
    Port dia 3.0"
    Port length 9.1 "

    contrast this with:
    LE10A
    Fb 32
    Vb 2.1 cu ft
    Port dia 3.0"
    Port length 6.2

    The larger box allows a shorter ductand it appears that group delay is somewhat reduced. Is there an acoustic downside to this?

  2. #2
    Senior Member DavidF's Avatar
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    Quote Originally Posted by hector.murray

    The larger box allows a shorter ductand it appears that group delay is somewhat reduced. Is there an acoustic downside to this?
    I can not think of one. In fact, longer ports are more likely to cause problems if the length exceeds the diameter by a factor of 3 or more.

    DavidF

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