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Reload Thread: School me on building ported boxes!

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    dredey's Avatar
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    School me on building ported boxes!

    I Know theres a lot of information out there but its all so confusing to me. i can barely find information on building a ported box for 2 subs, i can only find for 1 sub.

    i want the size of the box to be W-41in. L-16in and H- 14.75in.


    i read to get the internal you subtract 1.5 or 2X3/4 mdf.

    im using 2 12" type r dvc 4 ohms

    mount depth - 7.7in
    mount displacement - 10.9 in
    displacement front .071ft^3

    manafacture dimentions -

    vented

    18"X13.5 inX16.5in (one sub) ( i need for two..do i double the in.?)
    gross int vol - 1.7ft^3
    vent are diam. - 125in^2 (12in. X 1.25in)
    vent length - 22.75 in. ( the length i measure in my car was 16in so should i make my box longer to like 26in?)

    vent. disp - .305ft^3
    net int vol - 1.3 ft ^3

    i want it tuned to 33hz

    idk how to use this information

    the subs are running of about 600 watts each of an AQ 1200d amp.

    any help would be appreciated







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    dappa5's Avatar
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    Re: School me on building ported boxes!

    free box plans @ top of forum good place to start



    feedback thread

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    Re: School me on building ported boxes!

    x2 or use re's box builder. its a good way to start out but not really accurate on tuning. the12volt.com has a tuning calculator



    Current - BMW 335xi SQ Build w/ IA and Sundown
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    dredey's Avatar
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    Re: School me on building ported boxes!

    i looked but idk what it means. it says stuff like 3 at 32. what am i suppose to be lookin at




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    Re: School me on building ported boxes!

    3 @ 32 means the internal volume of the box is 3 cubic feet tuned to 32 Hz.



    '11 Jeep Patriot
    Head Unit - Pioneer AVH-P3200DVD
    Front - Massive Audio CK69X
    Front Amp - Massive Audio NX2
    Rear - Infinity Kappa's
    Subs - 8 Sundown SA-8 v2's
    Sub Amp - AB VFL 450.1
    147.6 @ 37Hz

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    Re: School me on building ported boxes!

    does 1hz make any difference?

    i wanted 33 but all i found was 32 and 34 at 4.4




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    Re: School me on building ported boxes!

    You probably won't notice any difference in 1Hz. You don't have to go by the plans exactly.. Do whatever fits best in your vehicle and and just pick a tuning frequency. Tune high if you just want high dB numbers from a meter or tune anywhere in the range of ~30-38Hz (depending on which sub you choose) to keep a decent sound quality.



    '11 Jeep Patriot
    Head Unit - Pioneer AVH-P3200DVD
    Front - Massive Audio CK69X
    Front Amp - Massive Audio NX2
    Rear - Infinity Kappa's
    Subs - 8 Sundown SA-8 v2's
    Sub Amp - AB VFL 450.1
    147.6 @ 37Hz

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    Re: School me on building ported boxes!

    I have don't have anything really to say pertaining to this thread... but I seriously LOL'd at your sig dB-SPL. I don't know what's funnier, roadmaster claiming that 100dB's can cause hearing damage, or the fact that roadmaster can actually obtain 100dB levels



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    I design and build boxes.
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    Re: School me on building ported boxes!

    Quote Originally Posted by DNick454 View Post
    I have don't have anything really to say pertaining to this thread... but I seriously LOL'd at your sig dB-SPL. I don't know what's funnier, roadmaster claiming that 100dB's can cause hearing damage, or the fact that roadmaster can actually obtain 100dB levels
    Actually, OSHA requires that employers not only provide ear plugs, but make it mandatory for their employees to wear them anywhere a work area exceeds 85dB. I'm sure that over-excessive exposure to 100+dB would result in a noticeable hearing impairment through time. Which is why I steal ear plugs from work before I listen to my Roadmasters.. Safety first.



    '11 Jeep Patriot
    Head Unit - Pioneer AVH-P3200DVD
    Front - Massive Audio CK69X
    Front Amp - Massive Audio NX2
    Rear - Infinity Kappa's
    Subs - 8 Sundown SA-8 v2's
    Sub Amp - AB VFL 450.1
    147.6 @ 37Hz

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