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Reload Thread: Box for 1 12" Sundown SA12

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    agarabaghi's Avatar
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    Box for 1 12" Sundown SA12

    Building a box for my friend's chevy aveo and figured i would build the same box for my discovery II.

    I plan on running it off a Cadence A7HC (~1200@1ohm) and he will be using a Audiopipe APSM 1300 (1000@1ohm).

    The box is 2.00cubic ft before displacement. Making it 1.85ft^3. I plan on running 1 4" aero port about 12.5" this gave me ~35hz tuning according to the PSP-Inc.com calculator.

    Any suggestions?







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    Re: Box for 1 12" Sundown SA12

    more port.



    1999 Tahoe
    2 sa12s
    4th order
    145.18 @33z... with less than 500 watts!

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    Re: Box for 1 12" Sundown SA12

    more as in 5", or more as in longer?




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    Re: Box for 1 12" Sundown SA12

    I'm building almost the same box for an SA12, I am going to use 2 x 3" aeros though to keep the port velocity down.




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    Re: Box for 1 12" Sundown SA12

    I have 2 4" aeros coming, one for each box. Could i run 2 4", and if so how long should each be?




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    Re: Box for 1 12" Sundown SA12

    The box is built...





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    Re: Box for 1 12" Sundown SA12

    Quote Originally Posted by agarabaghi View Post
    I have 2 4" aeros coming, one for each box. Could i run 2 4", and if so how long should each be?
    The ports would have to be way too long for it to work, like 30+ inches to tune in the mid 30s




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    Re: Box for 1 12" Sundown SA12

    so what do you recommend? Im not apposed to buying different ports?

    (2) 3" ports?




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    Re: Box for 1 12" Sundown SA12

    how long are your 3" ports going to be?




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    Re: Box for 1 12" Sundown SA12

    Quote Originally Posted by agarabaghi View Post
    so what do you recommend? Im not apposed to buying different ports?

    (2) 3" ports?
    Yes I think for that box 2 x 3" aeros is ideal. I played around with the box design for a long time and the 2 x 3" aeros was the best fit, it will give you a vent mach of 0.03 and there should be no port noise. My ports will be ~17" long to tune it around 32Hz, if you want to tune to 35Hz you can make them ~14" long.




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    Re: Box for 1 12" Sundown SA12

    the calculator tells me for my 1.97ft^3 box after displacement (2) 3"x14.5 Aeroports flared. Im assuming each port is 14.5 right? not 7.25 each?




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    Re: Box for 1 12" Sundown SA12

    Yeah they would both be 14.5"




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    Re: Box for 1 12" Sundown SA12

    how are you porting? I could do sub out, port side and fit 17" aeros. Or I could tune a bit higher 38, and run sub out port up. But ive never done port up in my land rover discovery II.... hmmm




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    Re: Box for 1 12" Sundown SA12

    I'm doing sub up, port up firing straight at the rear window of a hatchback. Sub and port will be on opposite ends of the baffle, I will use 90 degree elbows so the ports will be extending towards the sub inside the box.




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    Re: Box for 1 12" Sundown SA12

    What are the external dimensions of that box?




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