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Need help with dimensions for a round port box

Discussion in 'Subwoofer Box and Custom Fabrication' started by BrogenShea, Oct 25, 2011.

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  1. BrogenShea

    BrogenShea New Member

    I have a Crunch GPV12D4 12" sub with a Lanzar MAXP1200 amp and i need the dimensions for a round port box. I haven't been able to come up with the right one and I've been working on it for some time now. I have the specs from the manual the sub came with. These are the best numbers to work with according to the manufacturer
    Box Volume-1.75 ft^3
    Fb-38 Hz
    Port Size(Inside Diameter)-4 in
    Port Length-12.25 in
    F3-33

    Vas-74
    Qts-.411

    The dimensions in my car are 19.25' H x 38.75' W x 25.25' D. Any help is appreciated. This has been giving me a lot of trouble. Thanks!
     
    BrogenShea, Oct 25, 2011
    #1
  2. Ranger SVO

    Ranger SVO Full Member

    If we stay with the manufacturers recommendations then a box with a height of 14-inches, and a width of 18-inches and finally a depth of 17-inches should get you where you need to be. This size is just barely larger than 1.75 cu ft so you will use the same port dimensions.

    By the way, those are outside dimensions and I'm assumming your using 3/4-inch MDF
     
    Ranger SVO, Oct 30, 2011
    #2
  3. BrogenShea

    BrogenShea New Member

    Thanks so much you have no idea how much this helps!
     
    BrogenShea, Oct 30, 2011
    #3