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    building a areo port box but need help

    Ok I am building a new box with a single 6" areo port.
    The sub is a 12" mt.
    The box will be 3 cubes after sub and port displacement.

    Now the port has to be 17.35" correct? It will be tuned to 35hz.

    Now I can not figure out how to find out what the displacement of the 6"areo that is 17.35" long.

    Can someone please help me out here.?
    Is there a online calculator?


    Thanks in advance.




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    Re: building a areo port box but need help

    www.psp-inc.com they don't sell the 6in ports, but you can use the calculator

    edit, i didn't read the post right... are you just asking the displacement of the port? pi*r^2 times the length should do it.




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    Re: building a areo port box but need help

    ya that is the calculator I used.




    Refs
    http://heatware.com/eval.php?id=20692
    Refs on Ca.com
    HCCafan bought 2500d
    Toby his boy bought p6.2's
    dkguitarist sold kodak c330 digital camera.
    photocrazy8 bought stinger terminals.
    XsabesX sold PS3
    XsabesX Bought x890

    Aim demon505hp

    Rob Fox aka KNGOFTHEPKNGLOT=SCAMMER
    http://www.caraudio.com/forum/showthread.php?t=160382

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    Re: building a areo port box but need help

    I **** at math lol well I will see if i can figure it out.


    Ok is this right

    6" aero x 17.35" long = displacement of 0.28 cubic feet.
    If not I will try again.




    Refs
    http://heatware.com/eval.php?id=20692
    Refs on Ca.com
    HCCafan bought 2500d
    Toby his boy bought p6.2's
    dkguitarist sold kodak c330 digital camera.
    photocrazy8 bought stinger terminals.
    XsabesX sold PS3
    XsabesX Bought x890

    Aim demon505hp

    Rob Fox aka KNGOFTHEPKNGLOT=SCAMMER
    http://www.caraudio.com/forum/showthread.php?t=160382

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    Re: building a areo port box but need help

    l*pi*r^2

    (length)*(pi)*(radius)^2

    (17.35)*(3.14)*(6/2)^2

    = 490.56 in^3 / 1728 [in^3/ft^3]

    = 0.284 ft^3

    Look right to me!




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    Re: building a areo port box but need help

    Kool thanks.




    Refs
    http://heatware.com/eval.php?id=20692
    Refs on Ca.com
    HCCafan bought 2500d
    Toby his boy bought p6.2's
    dkguitarist sold kodak c330 digital camera.
    photocrazy8 bought stinger terminals.
    XsabesX sold PS3
    XsabesX Bought x890

    Aim demon505hp

    Rob Fox aka KNGOFTHEPKNGLOT=SCAMMER
    http://www.caraudio.com/forum/showthread.php?t=160382

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    Re: building a areo port box but need help

    thats what i said to do :P




    refs...
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    Re: building a areo port box but need help

    umm. isnt radius, half the diameter? meaning on a 6" diameter aero port...the radius would be 3"...



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    Re: building a areo port box but need help

    yeah just use the (pi R^2) x L formula to find the volume of the port. don't wory about the little extra due to the flared ends...won't account for much worth figuring.



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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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