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    ahillworks's Avatar
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    RockFord pch-812 box size help.

    Ok people either I am to tired or just blind. http://www.rockford-fosgate.com/rfte...412_812-TS.pdf

    Is the specs for the 812 rockford i have. I want to build new boxes for each sub or together. Have not figured which. All I want to know is what is the correct air space needed for just one sub. All help would be great.

    Thanks


    EDIT::::
    Ok I think I found it after looking hard enough correct me if I am wrong is it 4.697???



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    Re: RockFord pch-812 box size help.

    You know just got to thinking "dang on" thats alot of room lol. Ok if it needs 4.69 cubic feet for room how big would the box be if I wanted to port the single sub?
    Last edited by ahillworks; 11-06-2008 at 04:10 PM.



    Anthony H.
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    Re: RockFord pch-812 box size help.

    thats the VAS. its not the recomended air spaced need for that sub. what u need to do is that those peramiters and enter them into WinISD and that will help you find the needed volume.

    but i would recomed 1.5-2.25 cu ft tuned to 38



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    Re: RockFord pch-812 box size help.

    Thank you thats what I needed to know.



    Anthony H.
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    Re: RockFord pch-812 box size help.

    Quote Originally Posted by ahillworks View Post
    Thank you thats what I needed to know.

    and thats per sub



    Head installer for Hamilton Audio
    Macrom, Stetsom, RD and Sundown car audio

    1999 Jeep Cherokee Sport
    Eclipse CD3100 head unit
    Steg Audio System F4 380 4ch amp
    Macrom M2 6 1/2 comp set
    RE RE 10

    dB set up
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    http://www.sounddomain.com/ride/759285

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    406er's Avatar
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    Re: RockFord pch-812 box size help.

    wow, ive never scean a sub give me such a funky curve. now that ive modled it, i would do 3.75-4 cu ft, and tuning 40-42. and your realy gonna want to run a sub sonic filter,or eles this ***** is gonna unload



    Head installer for Hamilton Audio
    Macrom, Stetsom, RD and Sundown car audio

    1999 Jeep Cherokee Sport
    Eclipse CD3100 head unit
    Steg Audio System F4 380 4ch amp
    Macrom M2 6 1/2 comp set
    RE RE 10

    dB set up
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    http://www.sounddomain.com/ride/759285

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    Re: RockFord pch-812 box size help.

    Quote Originally Posted by 406er View Post
    wow, ive never scean a sub give me such a funky curve. now that ive modled it, i would do 3.75-4 cu ft, and tuning 40-42. and your realy gonna want to run a sub sonic filter,or eles this ***** is gonna unload
    Explain?



    Anthony H.
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    Re: RockFord pch-812 box size help.

    Quote Originally Posted by ahillworks View Post
    Explain?
    i dont think i can explain the way the sub modles, the curve is funky, leave it at that. build your box to 3.75-4 and tune to 40-42 and youll be happy.



    Head installer for Hamilton Audio
    Macrom, Stetsom, RD and Sundown car audio

    1999 Jeep Cherokee Sport
    Eclipse CD3100 head unit
    Steg Audio System F4 380 4ch amp
    Macrom M2 6 1/2 comp set
    RE RE 10

    dB set up
    SD3000, SPL12 143.4dB (in my 91 Sonoma)
    http://www.sounddomain.com/ride/759285

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