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Reload Thread: Port box size for 2 alpine type r 12's

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    Port box size for 2 alpine type r 12's

    So I don't want to spend 400$ to get a custom built ported box, so I've decided to make my own. Does anyone know the specifications I need to build it to? The port sizes, where to put the ports, what to tune it to, etc?







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    Re: Port box size for 2 alpine type r 12's

    Going from memory on my last build 2cuft each port 12x1.5x22

    Idd build 2 boxes to look like 1 with 2 port
    Aim for 5cuft to allow for port/ sub

    Then come back once you have a box size and someone will calculate the correct port size for the cuft you have and the hz you require




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    Re: Port box size for 2 alpine type r 12's

    Also wondering how I should do this, I have two 12 inch Type R's and I have a big trunk for a nice box




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    Re: Port box size for 2 alpine type r 12's

    First draw up the biggest box you wish,
    And work out the internal volume with atleat 3/4" mdf and divide that by 2
    With is for 2 subs
    Then minus the sub displacement and rough port displacement an you'll have the box cuft approximately.

    Off then you'll be able to calculate the correct port and hz and final cuft

    Then if you need you add os subtract volume from the box

    This is not the best way but does work




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    Re: Port box size for 2 alpine type r 12's

    Quote Originally Posted by Karl09 View Post
    So I don't want to spend 400$ to get a custom built ported box, so I've decided to make my own. Does anyone know the specifications I need to build it to? The port sizes, where to put the ports, what to tune it to, etc?
    I really hope that's an exaggeration. You can get solid, sturdy, quality-work boxes for about $100 on this forum.



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    Re: Port box size for 2 alpine type r 12's

    Yea $400 wtf?



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    Re: Port box size for 2 alpine type r 12's

    A box for two Type R's for $100? That will take at least a sheet of mdf which is around $31 last i checked then you have glue, carpet, etc.
    I hope someones time and skills is worth more than that.




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    Re: Port box size for 2 alpine type r 12's

    I'm new to this forum and every customs audio shop I have gone to has told me that I'm looking at 616$ from audio express, 450$ from 702 motoring, and around 500$ from a place called SS audio. Unless anyone on this forum lives in Las Vegas... I'm rather screwed lol. If anyone does happen to live in Las Vegas, I'd be willing to pay 300$ for a box and help with installation.




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    Re: Port box size for 2 alpine type r 12's

    $400 might be a quote from a shop or something.

    I know our enclosures are $190 + shipping for around 4ft3 net ported.




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    Re: Port box size for 2 alpine type r 12's

    Quote Originally Posted by pro-rabbit View Post
    $400 might be a quote from a shop or something.

    I know our enclosures are $190 + shipping for around 4ft3 net ported.
    It was a quote from a shop... do you guys custom build boxes? Where are you located?




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    Re: Port box size for 2 alpine type r 12's

    yes, they build custom boxes. Click on his sig and find his website



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