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Reload Thread: Please confirm that this is a GREAT box design for FI Sp4 D1

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    Icon14 Please confirm that this is a GREAT box design for FI Sp4 D1

    Will be running Autotek MM4000.1d, 250amp alternator, xs 3100, Shiruken 100ah







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    Re: Please confirm that this is a GREAT box design for FI Sp4 D1

    Quote Originally Posted by artrilliance View Post
    Will be running Autotek MM4000.1d, 250amp alternator, xs 3100, Shiruken 100ah
    You design it?



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    Re: Please confirm that this is a GREAT box design for FI Sp4 D1

    Quote Originally Posted by artrilliance View Post
    Will be running Autotek MM4000.1d, 250amp alternator, xs 3100, Shiruken 100ah
    No double baffle or bracing ? For a sp4 hmmmm




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    Re: Please confirm that this is a GREAT box design for FI Sp4 D1

    Little port also.



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    Re: Please confirm that this is a GREAT box design for FI Sp4 D1

    Quote Originally Posted by Timmy13091 View Post
    No double baffle or bracing ? For a sp4 hmmmm
    The exact thing i said



    2010 Nissan Altima Alpine Cde-145 2 Rockford Puch 6.5" (Soon to be 2 Neo pros and a tweet per door) 2 Rainbow Cal25 tweeters Rockford Fosgate 450.4 (Soon to be sax 125.4) 18" Dc level 6 18 m3 Box built by Dbeez 6 cubes at 30hz 2 6" aeros Crescendo gold 3kwp @.5 2 runs of Knu 1/0ga Singer 270a Alt Deka 9a31 100 sqft of misc deadener 151.6 @31hz.. Yes I'm in a trunk...

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    Re: Please confirm that this is a GREAT box design for FI Sp4 D1

    Quote Originally Posted by Timmy13091 View Post
    No double baffle or bracing ? For a sp4 hmmmm
    The exact thing i said



    2010 Nissan Altima Alpine Cde-145 2 Rockford Puch 6.5" (Soon to be 2 Neo pros and a tweet per door) 2 Rainbow Cal25 tweeters Rockford Fosgate 450.4 (Soon to be sax 125.4) 18" Dc level 6 18 m3 Box built by Dbeez 6 cubes at 30hz 2 6" aeros Crescendo gold 3kwp @.5 2 runs of Knu 1/0ga Singer 270a Alt Deka 9a31 100 sqft of misc deadener 151.6 @31hz.. Yes I'm in a trunk...

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    Re: Please confirm that this is a GREAT box design for FI Sp4 D1

    I don't know for sure, but the SP4's are monsters, so I'd guess a bigger port is in order, and like they said, double baffle and bracing.




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    Re: Please confirm that this is a GREAT box design for FI Sp4 D1

    Yes, I designed it and have redone the calculations for double baffle and bracing is already accounted for. As far as the port, it is 12.17 sq in. Should the 4" port width be wider, is that what you are suggesting?




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    Re: Please confirm that this is a GREAT box design for FI Sp4 D1

    16 square inches of port per cube.



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    Re: Please confirm that this is a GREAT box design for FI Sp4 D1



    I'm pushing to go for the larger box, smaller 4.5" port of around 14" cu in per foot, and keeping the tuning lower. Will this be a good compromise? My trunk space is maxed out and I feel from the WinISD graph that the larger box will have a smoother curve as well as gain closer to 3DB.

    How is it looking?




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    Re: Please confirm that this is a GREAT box design for FI Sp4 D1

    I have already tried adjusting port length and it starts eating up net box volume and takes a great deal more length for minor adjustments in tuning.




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    Re: Please confirm that this is a GREAT box design for FI Sp4 D1

    Bump?




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    Re: Please confirm that this is a GREAT box design for FI Sp4 D1

    I'd never tune that low or use less than 15" port.




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    Re: Please confirm that this is a GREAT box design for FI Sp4 D1

    Seems that almost everyone running Sp4's are tuned very low, is that just personal preference?




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