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



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    I have an opportunity to sell my box!!

    Alright! I have an opportunity to sell my OA15's box for $50

    My question is, everybody says the port on my box is too small, and its restricting what the sub can do! So I started to toy around with Torres box calculator, and I figured out I'm at 3.34 cubes @ 32 hz!

    I've noticed that to alter the tuning of the box, 2 things can happen! You can make the port really skinny like mine, and have a really short port length (mines 6 inches), or make the port wide and make the port really long!

    My question is, with these things that I've found out, is my port really "too small"? It achieves tuning and everything in the smallest package, and the output is still something to behold....

    I can sell my box tomorrow, and I've already got sketchers for a box that steele18 designed which is 3.2 cubes @ 30 hz, where the port is 2.75 Inches wide but a staggering 35 inches long!!

    If you don't know what my box looks like by now, you've been under a rock!

    Box:
    31 wide 16 tall 15 deep
    Port:
    Port: 14.5 tall 1' wide 6' deep







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    UnderFire's Avatar
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    Re: I have an opportunity to sell my box!!

    Your port is way too small, I did that too on my first box.

    The problem is, you should keep the width to height ratio of the port less than 9:1, so you port should be at least 2 inches wide, preferably 3 actually.

    And you port area in sq inches is not enough. You should keep it around 14-18 Square inches of port area per cubic foot. Right now you are sitting about 4.5 per foot.

    Torre's Calculator is great because it let's you add in all displacements and gives you the accurate Port area per Cubic foot measurement.



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    NASTY08IMPALA's Avatar
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    Re: I have an opportunity to sell my box!!

    Thats a tiny box for 15.s ...my box for my 12.s is 4.9@33




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    Re: I have an opportunity to sell my box!!

    Quote Originally Posted by EpicMango View Post
    Alright! I have an opportunity to sell my OA15's box for $50

    My question is, everybody says the port on my box is too small, and its restricting what the sub can do! So I started to toy around with Torres box calculator, and I figured out I'm at 3.34 cubes @ 32 hz!

    I've noticed that to alter the tuning of the box, 2 things can happen! You can make the port really skinny like mine, and have a really short port length (mines 6 inches), or make the port wide and make the port really long!

    My question is, with these things that I've found out, is my port really "too small"? It achieves tuning and everything in the smallest package, and the output is still something to behold....

    I can sell my box tomorrow, and I've already got sketchers for a box that steele18 designed which is 3.2 cubes @ 30 hz, where the port is 2.75 Inches wide but a staggering 35 inches long!!

    If you don't know what my box looks like by now, you've been under a rock!

    Box:
    31 wide 16 tall 15 deep
    Port:
    Port: 14.5 tall 1' wide 6' deep
    wayy not enough port area - 14.5" x 1" = 14.5 sq in of port, if it were 3" wide, it would be 14.5" x 3"= 43.5 sq in of port. 43.5 sq in of port / by 3.34 cubes = 13 sq in of port per cube...same thing uderfire said, basically.
    The idea is to reduce port noise.




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