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    round port question

    i'm thinking of making a ported box 2 cu. @ 31 hz here are the dimensions i'm thinking.

    width- 17"
    depth- 19"
    height- 16.5"
    without a port i figured the cu. is 2.348

    what i can't figure out is the dimensions i would need a round 4" port to be in order to tune it to 30-32 hz. i'm thinking side port, maybe... and the sub facing rear. i tried it calculating a square port, no dice. can't get it to tune low enough.



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    Re: round port question

    or i could do two 2" ports but i don't know what length they need to be...



    References: 3.5Max6spd, db Dom, theitalianjob76, redcalimp5, karkrazee96, altima98, eric12421, Blazin Bass

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    Re: round port question

    2 4"
    the 2 2" wont be enough
    a single 4" probably wont be either but around 14" long would be 31hz



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    Re: round port question

    how about two 4" round, 7" long ports facing the cab and the sub facing the rear ? would that make this enclosure 2 cu. @ 31hz ?



    References: 3.5Max6spd, db Dom, theitalianjob76, redcalimp5, karkrazee96, altima98, eric12421, Blazin Bass

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    Re: round port question

    Quote Originally Posted by jblayz1 View Post
    how about two 4" round, 7" long ports facing the cab and the sub facing the rear ? would that make this enclosure 2 cu. @ 31hz ?
    No. You doubled the amount of port area which means you need to increase the lengths.

    If you do 2 4" ports, you would need to make them 31.5" long EACH. I don't see that happening in your enclosure unless they're external.



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    Re: round port question

    **** it. backwards numbers again. seems to happen often in car audio.

    ok, so would i need to do one or two ports and what sizes?



    References: 3.5Max6spd, db Dom, theitalianjob76, redcalimp5, karkrazee96, altima98, eric12421, Blazin Bass

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    Re: round port question

    What sub and what kind of power?



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    Re: round port question

    12" tc3k hybrid and re 12.1 1200@1 ohm. i could do it this way too. but the enclosure is humungus..LOL.



    References: 3.5Max6spd, db Dom, theitalianjob76, redcalimp5, karkrazee96, altima98, eric12421, Blazin Bass

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