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    Drummer65's Avatar
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    30" x 2" Square port?

    Hey guys

    Im helping a friend with a build for a DD 9515g

    Box is 4 cubes and the slot port would be 30" x 2" for a total of 60 square inches of port"

    My question is is the 2" of port sufficient in height or will air have trouble escaping the port? Do i need to do like 20x3" or 15" x4"?

    It would be much easier to do the 30"x2"

    Thanks



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    Re: 30" x 2" Square port?

    nope. you will build too much compression with such a skinny port. it will mess with your tuning and it will create port noise.




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    Re: 30" x 2" Square port?

    too much skinny



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    Re: 30" x 2" Square port?

    Yeah figured I would get port noise

    Okay so ill go with 15"x4" then. Does 60" of port area sound right for a DD 9515? About 2.5k watts going to it.

    I had about 95" for two on my past setup



    Car: 2001 Honda Civic LX

    Headunit: Clarion EQS746
    Processor: Arc Audio PS8
    Front Stage: Peerless 830875 6-1/2" - SB Acoustics SB29RDC Tweeters
    Front Stage Amp: Vibe litebox Stereo 4 (Tweets) Punch 550.2 (Mids)
    Subwoofers: 2 x DD 9515g - 6 cubes 34hz
    Subwoofer amps:2 x SAZ-3500d's
    Electrical: DC Power 180HP, 2 Batcap 4000's, 1Batcap3000, 1 Deka 9a31 all in the trunk

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    Re: 30" x 2" Square port?

    16^2 for DD's is the norm for daily.

    1:9 ratio for slot ports, so your 2x30 is not even close...




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    Re: 30" x 2" Square port?

    I don't think That's how the calculation works, Try downloading Torres box calculator, it gives you the real port area as well as the square inches per cubic foot automatically.



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    Re: 30" x 2" Square port?

    The recommended DD box system uses 16sq in of port for every cube so you could go a little bigger to ~64sq in of port area.



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    Re: 30" x 2" Square port?

    Quote Originally Posted by Drummer65 View Post
    Hey guys

    Im helping a friend with a build for a DD 9515g

    Box is 4 cubes and the slot port would be 30" x 2" for a total of 60 square inches of port"

    My question is is the 2" of port sufficient in height or will air have trouble escaping the port? Do i need to do like 20x3" or 15" x4"?

    It would be much easier to do the 30"x2"

    Thanks

    No...no..no...please...NO.

    If you are thinking about a 30"x2" port for a DD9515G, just abandon your box design NOW!!!!!

    Please, let me help you. PLEASE!
    .
    .
    .
    .
    First off:

    What vehicle are you using?

    Second:

    What is your max measurements for the enclosure?

    I will have other questions, but you CAN NOT answer them without first answering these first 2 questions.



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    Re: 30" x 2" Square port?

    Quote Originally Posted by Canaan View Post
    No...no..no...please...NO.

    If you are thinking about a 30"x2" port for a DD9515G, just abandon your box design NOW!!!!!

    Please, let me help you. PLEASE!
    .
    .
    .
    .
    First off:

    What vehicle are you using?

    Second:

    What is your max measurements for the enclosure?

    I will have other questions, but you CAN NOT answer them without first answering these first 2 questions.
    Yeah i'm not doing a 30x2 port

    I'm going with 4 cubes, 32hz with 60" of port area (15" x 4")

    Here is the box design. Sub facing up port is facing up on drivers side. Sub will be on top on the right side or directly in the middle of the box.

    Max dimensions 31" wide, 27" deep. 12" height towards the trunk lid and max 18" where the seats will be.

    Car is a 2004 Hyundai tiburon, so its a hatch.
    Attached Thumbnails Attached Thumbnails 30" x 2" Square port?-mchale-boxxxyy-7.jpg   30" x 2" Square port?-mchale-boxxxyy-6.jpg  



    Car: 2001 Honda Civic LX

    Headunit: Clarion EQS746
    Processor: Arc Audio PS8
    Front Stage: Peerless 830875 6-1/2" - SB Acoustics SB29RDC Tweeters
    Front Stage Amp: Vibe litebox Stereo 4 (Tweets) Punch 550.2 (Mids)
    Subwoofers: 2 x DD 9515g - 6 cubes 34hz
    Subwoofer amps:2 x SAZ-3500d's
    Electrical: DC Power 180HP, 2 Batcap 4000's, 1Batcap3000, 1 Deka 9a31 all in the trunk

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