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    Bender.'s Avatar
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    calculating port area

    my box is 11 cuft and my external dimensions are...

    53.25" wide
    24" tall
    18.25" deep

    i will not be using a side wall as part of my port...it will be in the middle between the subs...can someone either give me a link to a calculator or just do it for me? thanks

    edit: o and btw the subs will be inverted so they dont count in displacement...and i want it tuned to 35hz

    edit: i just downloaded winISD and i get a port that is 5.51" x 5.51" x 2.23"......something seems wrong

    edit: o i think i have figured it out...you have to put in your opening size and it will tell you how long the port needs to be
    Last edited by Bender.; 11-19-2008 at 07:17 PM.



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    Re: calculating port area

    "edit: o i think i have figured it out...you have to put in your opening size and it will tell you how long the port needs to be"

    Very good young Jedi....you answered your own question i think. but xhck here also.

    http://www.bcae1.com/spboxnew2.htm
    http://www.reaudio.com/speaker_box/LPort_Box_Calc.html

    and are you seperateing the subs so they have their own chamber or airspace?



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    Re: calculating port area

    Your not using enough port area.
    Using a kicker two 15" L7's as my model
    I figure you should build a 10" x 10"
    port that is 13.22" deep. The net
    box displacement is right at 10.5 cubic
    feet.



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    Re: calculating port area

    Quote Originally Posted by mcsoul View Post
    Your not using enough port area.
    Using a kicker two 15" L7's as my model
    I figure you should build a 10" x 10"
    port that is 13.22" deep. The net
    box displacement is right at 10.5 cubic
    feet.
    after i figured it out i got a port that is 22.5" tall, 4" wide, and 11.3" deep
    would this work?

    edit: same airspace
    Last edited by Bender.; 11-20-2008 at 01:49 PM.



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    Re: calculating port area

    I ran your enclosure in bassbox pro 6 and the above port and the box in your first post would put you at 35.55hz with a port area of 90sqin. It would work well with your subs



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    Re: calculating port area

    Quote Originally Posted by ABSOLUTEAUDIO View Post
    I ran your enclosure in bassbox pro 6 and the above port and the box in your first post would put you at 35.55hz with a port area of 90sqin. It would work well with your subs
    yep thats what i was aiming for



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    Re: calculating port area

    dear god i have tried winISD, re, and carstereo.com and i have gotten 3 different measurements

    all are 22.5 tall and 4 in wide

    winISD-----11.3
    re-----------13.25 turn and go 8
    carstereo--8.17



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    Re: calculating port area

    ???



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    Re: calculating port area

    which one should i use?



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    Re: calculating port area

    You could do something like this and it will work:



    That's right around 9 cubes tuned to 35hz with 135in^2 of port area. You will need bracing on that back wall though.



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