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    Icon32 questions for Jmac and the experts for xxx 12 box

    Help needed from the experts.

    12" xxx down firing

    02 f150 extended cab.
    I will use the 40 portion of the rear 60/40 split bench seat.

    Looking towards the back of the truck, using 3/4" mdf
    external box dimensions are...

    18" wide
    17" deep

    I can go as high as necessary to accomodate multiple boards for port.
    The bottom will be braced squared with 2x2's (1-1/2 x 1-1/2 actual)

    I'm looking to end up with between 2.5 - 3 cubes
    tuned to about 29 to 30. (unless the experts here advise different).

    Can anyone run these numbers and give me final dimensions??
    Last edited by spr_f150; 09-30-2004 at 09:16 PM. Reason: down fire







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    Re: questions for Jmac and the experts for xxx 12 box

    20 inches high and your diminsions would give you 2.738ft3...I'd punch it in to see if it would work but I can't find xxx specifications on winisd. sry



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    Re: questions for Jmac and the experts for xxx 12 box

    I read in a thread here that driver displacement is .19 cu and the following is from re's web site.

    XXX12

    Fs 27.0 Hz
    Re 1.9 DVC
    Qms 4.52
    Qes 0.44
    Qts 0.4
    Sd om2 480
    Vas 56.5
    Xmax 32mm
    BL 17.1
    SPL 1W/1m 85.9
    RMS 1600 W
    Max 2500 W

    I notice that your calculation does not include driver, bracing, and port displacement.




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    Re: questions for Jmac and the experts for xxx 12 box

    i got 18x17x27 with a slot port that is 15.5x2 and 37"long tuned @30Hz
    psthe box dimentions are external.



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    Re: questions for Jmac and the experts for xxx 12 box

    TTT (10 chars)




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    Re: questions for Jmac and the experts for xxx 12 box

    tttttttttt




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    Re: questions for Jmac and the experts for xxx 12 box

    what was wrong with the dimentions i gave you?



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    Re: questions for Jmac and the experts for xxx 12 box

    Nothing "wrong" with what you gave, just wondering if anyone else has ideas/suggestions. Thanks for the info you have supplied.




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    Re: questions for the experts for xxx 12 box

    Quote Originally Posted by jellyfish420
    i got 18x17x27 with a slot port that is 15.5x2 and 37"long tuned @30Hz
    psthe box dimentions are external.
    Thanks jellyfish. I've kinda changed my mind though. Instead of down firing, I think I'll go up firing. Pretty much same dimensions, but do you think I could fire it up with the port on the same face as the sub, but use a 3 inch port and tuned to about 33-35? How long should the port be and should I go larger than 27?

    Thanks for any help




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