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  1. #1
    sikcavy's Avatar
    sikcavy is offline CarAudio.com Elite



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    help me get loud please.

    I have a 03 cavalier with a g34 yellow top and a single 3512 running at .7ohms on a very old school us amps 100hc running maybe a little over 1k watts. i built 2 boxes so far for this one 12" (was testing with a 12" bass mekanik before) one for street bass so it wasn't that loud on the TL. The SPL box (what I'm currently messing around with) is 2.5 cubic feet double walled (doubled up on mdf so 1.5" walls all around) tuned to 55. The sub is firing into the cabin on the passanger side and the vent which is 72^2 inches is on the drivers side of the box. I am following db drag rules so everythign is sealed up and mic on the windshield. I peaked at 43hz so that tells me the box is tuned too high. I reached a score of 141.0 I then took a piece of mdf the length and height of the box and put it in the vent. This brought the area to be 63^2 inches and the tuning was dropped to 50. I tested and came out with same results. I then upgraded my wiring from 4 gauge all around, to 0 gauge all around i gained .5db's. i have another plug that I will be throwing in the vent monday to drop the tunning to 44. i will then update you guys with the outcome and go from there. I plan on building another box but this time having the sub and the vent firing towards the cabin sealed off from the trunk. I just don't know if I should run a box at 2.5 cubic feet or smaller. i will be using a 6" precision port and start from 30 and cut away until I dont get any more increases. So my question for you guys is what would you recommend 2.5 cubic foot box or smaller?



    03' tiburon gt
    american bass 400.1
    2x AQ HDC3 10's
    DD component set
    Sundown 50.4
    NSB 2400
    Kenwood excelon x991
    shop pack of Damplifier pro.
    www.afterdarkcustoms.com




  2. #2
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    Re: help me get loud please.

    Small box, big port, and alot of power. Try a little smaller, around 1.75, tune it to the res. freq. of the car, and have around 1000-2000rms. Usually in a trunk two 12's on 2000rms ported gets in the high 140's, but depending on the install and how much money you have, it can be either or.



    - 12'' Fi BL Fully Loaded - 2.2 cu. ft. box @ 35hz - 29 sq. in. of port - Stinger SPV 44 - Us Amps Merlin MD3D @ 2ohm - 5.25'' PG RSD Components - Big 3 in Hyperflex 1/0 - Pioneer DEH-3000IB - 140 sq. ft. of Stinger Roadkill Expert
    Refs: Slam, Ridinhi, Blados, Pioneerpimp, Kowboy

  3. #3
    thegreatestpenn's Avatar
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    Re: help me get loud please.

    your score isn't bad. tuning on the spl box is really hi and the box is too large. remember spl boxes are generally very small and tuned like 5-10Hz below car's optimal tuning in most cases. sealing off the trunk should help drastically. more power would help drastically too.



    http://www.caraudio.com/forums/buyer-seller-feedback/401249-thegreatestpenn-feedback-thread.html
    2k2 honda civic
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  4. #4
    sikcavy's Avatar
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    Re: help me get loud please.

    there is no option of more power. there are some comps i go to that class you by power and i want to stay in my class.. so you guys recommend me going to 2 cubic feet with a 6" port?



    03' tiburon gt
    american bass 400.1
    2x AQ HDC3 10's
    DD component set
    Sundown 50.4
    NSB 2400
    Kenwood excelon x991
    shop pack of Damplifier pro.
    www.afterdarkcustoms.com

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    Re: help me get loud please.

    Then try smaller boxes with the new tuning and test it out. There's no definate answer as to if it's gonna be 3db's louder or not, there's so many variables that come into play when pressurizing high amounts of air, you just have to try it out and see what works best.



    - 12'' Fi BL Fully Loaded - 2.2 cu. ft. box @ 35hz - 29 sq. in. of port - Stinger SPV 44 - Us Amps Merlin MD3D @ 2ohm - 5.25'' PG RSD Components - Big 3 in Hyperflex 1/0 - Pioneer DEH-3000IB - 140 sq. ft. of Stinger Roadkill Expert
    Refs: Slam, Ridinhi, Blados, Pioneerpimp, Kowboy

  6. #6
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    Re: help me get loud please.

    I have done exactly what you are trying to accomplish.

    I had a single 12" in the trunk in a SPL box tuned to 60Hz @ 2.5 cubes. Scored like a 146 with 2 Sundown 1500's strapped to it.

    Sealed off the trunk, SPL-X firing into the cabin, made box smaller to 1.75 cubes and tryed again. This time I prevailed with a 151.3. Loudest I ever had it, just throw big power and seal off the trunk..




    I miss that set-up..



    Refs: Andrew2944r, RyanM923, BASSMEKANIK, Sundowz, Rusty...WCA, TeZ, William Brea, LExus300, amp junkie, DUMPED, and tons more..

    99 Regal GS - SUPERCHARGED B|TCH

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    Re: help me get loud please.

    what league are you in? It sounds like IASCA and if so they use the amp's 4ohm power rating so as long as the power rating at 4ohm is within your division's limits you are good. I ran a 1500wrms amp in the lowest division because at 4ohm it was only rated to do 500wrms



    http://www.caraudio.com/forums/buyer-seller-feedback/401249-thegreatestpenn-feedback-thread.html
    2k2 honda civic
    summer build
    audison sr4 on focal polyglass 165vb components active
    soundstream rubi1.2500d on dc lvl4 xl 18
    pioneer deh-80prs


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    sikcavy's Avatar
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    Re: help me get loud please.

    do you guys recommend 2 4" or 1 6" ports?



    03' tiburon gt
    american bass 400.1
    2x AQ HDC3 10's
    DD component set
    Sundown 50.4
    NSB 2400
    Kenwood excelon x991
    shop pack of Damplifier pro.
    www.afterdarkcustoms.com

  9. #9
    thegreatestpenn's Avatar
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    Re: help me get loud please.

    1 6" has more port area than 2 4"s so go with the single 6". even tho my box has 2 4"s and it gets plenty loud



    http://www.caraudio.com/forums/buyer-seller-feedback/401249-thegreatestpenn-feedback-thread.html
    2k2 honda civic
    summer build
    audison sr4 on focal polyglass 165vb components active
    soundstream rubi1.2500d on dc lvl4 xl 18
    pioneer deh-80prs


  10. #10
    sikcavy's Avatar
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    Re: help me get loud please.

    the only issue with that is i will have to make the box longer to be able to use a long 6" vs having 2x shorter 4"



    03' tiburon gt
    american bass 400.1
    2x AQ HDC3 10's
    DD component set
    Sundown 50.4
    NSB 2400
    Kenwood excelon x991
    shop pack of Damplifier pro.
    www.afterdarkcustoms.com

  11. #11
    thegreatestpenn's Avatar
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    Re: help me get loud please.

    yeah there's always sacrifices to be made when getting loud.



    http://www.caraudio.com/forums/buyer-seller-feedback/401249-thegreatestpenn-feedback-thread.html
    2k2 honda civic
    summer build
    audison sr4 on focal polyglass 165vb components active
    soundstream rubi1.2500d on dc lvl4 xl 18
    pioneer deh-80prs


  12. #12
    WildSebring's Avatar
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    Re: help me get loud please.

    2 4" PSP Ports would work plenty well. Thats what I used..



    Refs: Andrew2944r, RyanM923, BASSMEKANIK, Sundowz, Rusty...WCA, TeZ, William Brea, LExus300, amp junkie, DUMPED, and tons more..

    99 Regal GS - SUPERCHARGED B|TCH

  13. #13
    sikcavy's Avatar
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    Re: help me get loud please.

    is there any difference between 6" port and 4x 3" ports? same area just smaller ports but with more.. would there be a bad side to this?



    03' tiburon gt
    american bass 400.1
    2x AQ HDC3 10's
    DD component set
    Sundown 50.4
    NSB 2400
    Kenwood excelon x991
    shop pack of Damplifier pro.
    www.afterdarkcustoms.com

  14. #14
    thegreatestpenn's Avatar
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    Re: help me get loud please.

    if you can find a way to get them all on the same plane I don't see a problem with it.



    http://www.caraudio.com/forums/buyer-seller-feedback/401249-thegreatestpenn-feedback-thread.html
    2k2 honda civic
    summer build
    audison sr4 on focal polyglass 165vb components active
    soundstream rubi1.2500d on dc lvl4 xl 18
    pioneer deh-80prs


  15. #15
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    Re: help me get loud please.

    I tune my box in the vehicle. I seal all sides but the back and the port wall ( I like slot ports ) and test and cut till I peak out. Hope that helps.



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