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    Roddy_T's Avatar
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    did i do this right

    my box is 9.05 cf
    and want it tune to 30 hzs
    so would the port be 5*12*12 inches?







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    Trixter's Avatar
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    Re: did i do this right

    for 9.05cu' tuned to 30hz and using 60sq" of port i come up with a length of 13.5...if you need to add an end correction factor (port and box share a common wall) then add 1/2 the port width to the length to get a new length of 16.5" long.



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    Re: did i do this right

    thanks dude




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    Re: did i do this right

    Quote Originally Posted by Trixter View Post
    for 9.05cu' tuned to 30hz and using 60sq" of port i come up with a length of 13.5...if you need to add an end correction factor (port and box share a common wall) then add 1/2 the port width to the length to get a new length of 16.5" long.
    its 128 sq. in. of port




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    Re: did i do this right

    Quote Originally Posted by jmanpc View Post
    its 128 sq. in. of port
    Actually...5 x 12 = 60 in^2

    I think he initially calculated the port to be 12" in length, not 12" x 12".




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    Re: did i do this right

    Your port should be just fine as long as the 9 cubic feet is after the port displacement. You need 13.35 inches of port length and you have 14.5 so it's tuned right around 29hz.



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