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    Square mdf port.

    I need a little help. I've decided I'm just going to build a square port instead of wasting more money on this box. Box will be 2.9-3 cubes... I need to know the deminsions of a sqaure port that would give me 38hz and no port noise. I ran this through an online calculator and got a 4x4" port 7"long. Would that get me what I need?







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    acold7dusta's Avatar
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    Re: Square mdf port.

    4 inch PVC make it a lil longer FTW?



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    Re: Square mdf port.

    Need more port area. 14-16in^2 per cubic foot is a good rule of thumb....



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    Re: Square mdf port.

    Quote Originally Posted by acold7dusta View Post
    4 inch PVC make it a lil longer FTW?
    id rather use a square port ftw



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    Re: Square mdf port.

    ok make more work on yourself, and take up more volume, be my guest



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    Re: Square mdf port.

    Quote Originally Posted by acold7dusta View Post
    4 inch PVC make it a lil longer FTW?
    a round port would have less port area and therefore have a greater chance of port noise and would have to be shorter to achieve the same tuning.

    for a single 12" sub you should probably have about 25in^2 of port area.

    also, is that 3ft^3 before port displacement?




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    Re: Square mdf port.

    I had a 6x4" port for my L7 and it had no port noise. Rounded the edges though.



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    Re: Square mdf port.

    try using this calculator:

    http://www.carstereo.com/help/Articles.cfm?id=31

    you could go with a 5x5 port, 11.5" long



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