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Thread: Port Resonance

  1. #16
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    If still in the design stage, and you have carpeted floors, consider placing the port on the bottom of the enclosure and having it raised 2" or so. This will greatly reduce audibility of higher freq noises from the port directly.

    Damping and retuning the enclosure innards could be very effective at 600Hz to minimise problems issuing through the cone.

  2. #17
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    I have begun the build, and things are moving smoothly. I decided to make the front baffle removable, so that if things turn out poorly I can try different port diameters if need be.

    WinISD predicts a 1st resonance around 900Hz. I can go down lower with my horn below that frequency so that looks to be my best option to avoid unwanted resonance.

    I'd like to thank again everyone who has helped me with this.

    Allen

  3. #18
    Senior Member Ian Mackenzie's Avatar
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    The answer may lie in using a curve (elbow) pvc tube.

  4. #19
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    Quote Originally Posted by Ian Mackenzie View Post
    The answer may lie in using a curve (elbow) pvc tube.
    Thats one of the things I will try if I find that i have a resonace. I can cross over at 800 hz with out a problem for the driver (BMS coax) but i dont tend to like the sound of the horn that i'm using crossed that low (westlake style smith horn).

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