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Reload Thread: Port Length for 28hz?

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    Port Length for 28hz?

    I have external dimensions of 49"W x 16"H x 15.5" D ( I can change the width if necessary). I want a port on each side that is about 3" wide. How long should it be on each side? My goal is 3.8-4 cu @ 28 hz.

    edit: or would it be easier to have one port located in the middle?







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    Re: Port Length for 28hz?

    a 14.5" x 3" slot on each side?




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    Re: Port Length for 28hz?

    Quote Originally Posted by mazdakid View Post
    a 14.5" x 3" slot on each side?
    That's what I got, but I am coming up with each one being about 32 in or so?




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    Re: Port Length for 28hz?

    32" would only be for 1




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    Re: Port Length for 28hz?

    Quote Originally Posted by mazdakid View Post
    32" would only be for 1
    I meant each.




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    Re: Port Length for 28hz?

    no that would be alot of port area, and they would each need to be longer. just make one thats like 14.5x3.5




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    Re: Port Length for 28hz?

    2 ports that are 14.5 x 3 each 32" long would tuned it to about 39hz




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    Re: Port Length for 28hz?

    Quote Originally Posted by mazdakid View Post
    no that would be alot of port area, and they would each need to be longer. just make one thats like 14.5x3.5
    Quote Originally Posted by mazdakid View Post
    2 ports that are 14.5 x 3 each 32" long would tuned it to about 39hz
    I just like the way the it looks with them on the ends, but oh well. 1 port it is!

    Thanks for the input.




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    Re: Port Length for 28hz?

    why don't you do 2 taht are 14.5 x 1.5 or so?



    2006 Jeep Liberty
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    Lv = [(14630000 x R^2) / (Fb^2 x Vb)] - 1.463R
    *Vb = vol. in cu"
    **R = sq.rt. A / Pi (for square/slot port)

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    Re: Port Length for 28hz?

    yeah, two skinnier ports would be much more practical.

    tuning that low with 6" of total port width would be a LONG port!

    also, with two ports, make sure you do the calculation by dividing the box volume in half and using one port, then just make the second port the same length.




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