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    mcbuggin's Avatar
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    port help

    I have 6.75cf net for 2 HDc15's and to have the right port opening I need to add 10sq in. now I have some 3in inner diam. pvc to get close to 10sq in would I need to add 2 of these or how many sq in. is in a 3" diam. opening. Thanks







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    Re: port help

    you need to add another 10in^2 in addition to the one you have now?




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    Re: port help

    yes it's an old box that I had my BTL18 in




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    Re: port help

    modified an old CRX style box and want to see what numbers I get before I decide to wall it off currently have 85in^2 but need closer to 95




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