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    drivingreckless's Avatar
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    Building an effiecient spl box

    i need some Tips on building an efficient spl box i know my current box isnt efficient enough although i have hit a 147.8 on a TL it doesnt satisfy me im lookin at 150 like no other its been almost a year since i have set out on 150 and no go so now im asking for help.

    please give me tip/ideas on building an efficeint spl enclosure.
    equipment listed below



    200a alt
    APX motor




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    Re: Building an effiecient spl box

    tune higher



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    Re: Building an effiecient spl box

    Quote Originally Posted by dvrmstrng View Post
    tune higher

    thats not always the case ive tuned to as high as 55hz and seen a loss.



    200a alt
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    Re: Building an effiecient spl box

    resin



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    Re: Building an effiecient spl box

    ive seen losses and gains from resin i do resin my boxes when i see fit



    200a alt
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    Re: Building an effiecient spl box

    What kind of vehicle?



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    Re: Building an effiecient spl box

    you need more power and to learn how to make your own aeroports



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    Re: Building an effiecient spl box

    Quote Originally Posted by drivingreckless View Post
    thats not always the case ive tuned to as high as 55hz and seen a loss.
    true, My car peaks @ 40hz even with 55hz tuning. tuning higher may or may not improve numbers depending on the vehicle, also play with port area as opposed to box size.




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    Re: Building an effiecient spl box

    i did 150+ in my jetta (trunk car) with my 2 cvx 12's on a kx2500.1 @ 1 ohm tuned at 63hz, box was 2.25^3 with (2) 4 in aero ports



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    Re: Building an effiecient spl box

    with that 2500.1 and a 9515 play around with a few different boxes...

    I know I have seen a 9515 with a lil past 3k after box rise and he popped a 151...

    also box size... what size ya got?

    vehicle you have makes a difference...whatcha got?



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    Re: Building an effiecient spl box

    i have a nissan xterra.
    i peak at around 46 hz (resonant freq.)
    i have played with alot of ports lol
    like you cant imagine ive tryed 4" ports 6" ports and 1 8" port
    didnt see much improvement
    where i did see improvement is when i started makin slot ported boxes with as much port area as i could throw at it, my problem is knowing where to tune its just a pain in a$$ not havin a TL
    b/c its a guessing game. i know i can pull a 150 if i get the box right which i cant seem to do.



    200a alt
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    Re: Building an effiecient spl box

    do what snoopdan did.....make a horn style port and make the back wall of the box out of a marble slab that'll resonate sound the way u want it to



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    Re: Building an effiecient spl box

    here is my current design the specifications of this box will be as follows:
    8 cubes net
    tuned to 40 hz
    165 inches of port area
    corners will be 45degs (taken into account so 8 net is correct)
    also the box will be resined

    lets see some input guys took me a bit to draw up these plans.....
    the one with the sub cut out is the top view and the port view is the front view.

    suggestions are welcomed!




    200a alt
    APX motor

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    Re: Building an effiecient spl box

    Quote Originally Posted by drivingreckless View Post
    here is my current design the specifications of this box will be as follows:
    8 cubes netFOR 2 SUBS GOOD 1 SUB IFFY...IF U HAVE 1 SUBS TRY HALF THAT
    tuned to 40 hzTUNE LOWER ...TRY 35HZ
    165 inches of port areaTO BIG, IF ITS 1 SUB IN 8CUBES WITH THAT BIG OF A PORT THE SUB COULD THINK ITS IN A FREE AIR SITUATION
    corners will be 45degs (taken into account so 8 net is correct)
    also the box will be resinedF.UCK RESIN...OIL BASED ENAMEL PAINT FTW!!
    ok in the bold part is wat u need to do and it will improve your number

    80




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    Re: Building an effiecient spl box

    you see i was thinking the same thing, but after alot of research into previous posts on termpro i found that almost everytime the 9515s were mentioned with spl they reccomended boxes with net cubes of 7-10, also most of them reccomended cone area = to port area, also i took into account my resonant frequency i peak at 46 hz so decided 6 hz below would do me some justice.
    Apparently 9515s like big boxes with a big port. some say its an efficient box for the subwoofer, they also thru out numbers that surprised me so i had to throw this idea out.

    also whats that paint your talkin about whats it do?



    200a alt
    APX motor

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