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Reload Thread: Who's willing to help me with a 4th Order? Willing to pay if need be.

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    528hz's Avatar
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    Who's willing to help me with a 4th Order? Willing to pay if need be.

    I want to build a 4th order bandpass for my trunk this weekend, and use my 4 RD Sonance 12s". I want the port to be going through the ski port. I figured this is the best way to get all the bass into the cab since I don't roll with my backseats down.

    The ski port does NOT set flush with the floor of the trunk so I'm guessing I will need to slant the port to some degree. I DO NOT want the port going THROUGH the ski hole. I want it to set a couple of inches away from it.

    I want this to have a flat response, but get low as well.

    My max dimensions are as follows:

    15 H x 30 W x 33 L

    Ski port dimensions are : 6.5" wide x 10.5" tall


    Here is what my car looks like in the trunk and backseat:















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    Re: Who's willing to help me with a 4th Order? Willing to pay if need be.

    Where are all you box gurus? GM said he would help me, but I figured I would get an early start.




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    Re: Who's willing to help me with a 4th Order? Willing to pay if need be.

    theres a max of 8.5 cubes sealed with no sub displacement.....kinda small to do a 4th order for 4 12's in....if you drop to 2 of them someone may be able to help you out....




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    Re: Who's willing to help me with a 4th Order? Willing to pay if need be.

    Quote Originally Posted by cj407 View Post
    theres a max of 8.5 cubes sealed with no sub displacement.....kinda small to do a 4th order for 4 12's in....if you drop to 2 of them someone may be able to help you out....

    Small, really? These subs don't need gigantic ported boxes. I'm going to build a box for three of them at 1.7 cubes each too.




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    Re: Who's willing to help me with a 4th Order? Willing to pay if need be.

    pm 80inches, he seems to know alot, i could model one up in bbp but i dont have enough experience to really tell how it would sound



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    Re: Who's willing to help me with a 4th Order? Willing to pay if need be.

    yea my dd3510 80 designed a 4th order for...ends up being 2.8 cubes for 1 10....u have to have a sealed chamber and a ported one....




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    Re: Who's willing to help me with a 4th Order? Willing to pay if need be.

    heres my .02

    you can possibly (im not sure how they would fit) run 2.6 sealed and 5.0 ported leaving you with about 60 inches of port area running 10-11 inches long.

    not the most optimal, but it will fit.

    not sure how youd mount the subs though.




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    Re: Who's willing to help me with a 4th Order? Willing to pay if need be.

    Quote Originally Posted by iamamp3pimp View Post
    heres my .02

    you can possibly (im not sure how they would fit) run 2.6 sealed and 5.0 ported leaving you with about 60 inches of port area running 10-11 inches long.

    not the most optimal, but it will fit.

    not sure how youd mount the subs though.
    Well...let me see if I can illustrate this.

    With my height being able to go 15 in. I can mount the subs vertical. So what I am thinking I would like to do, is basically build a box just like my present sealed one, but with the subs inside firing at each other, facing the middle of the box. I would put a piece of wood down the center of the port to prevent cancellation.

    How am I doing on the wondering part?




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    Re: Who's willing to help me with a 4th Order? Willing to pay if need be.

    patiently and eagerly awaiting 80s post...




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    Re: Who's willing to help me with a 4th Order? Willing to pay if need be.

    Quote Originally Posted by 528hz View Post
    patiently and eagerly awaiting 80s post...
    ^^^me to, have a few questions for him and his pm's are full.
    (sorry for the thread jack op.)

    -vic



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    Re: Who's willing to help me with a 4th Order? Willing to pay if need be.

    i just saw this thread....4 12's in a 4th order with only 8.5 cubes 2 play with .....i wouldnt do it..2 yea most def..3 maybe.....and thats pushin it

    80




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    Re: Who's willing to help me with a 4th Order? Willing to pay if need be.

    Not enough room for 4 ...




    TEAM XS POWER TEAM MECHMAN

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    Re: Who's willing to help me with a 4th Order? Willing to pay if need be.

    Quote Originally Posted by 528hz View Post
    Well...let me see if I can illustrate this.

    With my height being able to go 15 in. I can mount the subs vertical. So what I am thinking I would like to do, is basically build a box just like my present sealed one, but with the subs inside firing at each other, facing the middle of the box. I would put a piece of wood down the center of the port to prevent cancellation.

    How am I doing on the wondering part?
    remove the piece of wood and youre golden.

    if its off by the slightest, it will cause you massive problems




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    Re: Who's willing to help me with a 4th Order? Willing to pay if need be.

    http://www.the12volt.com/caraudio/boxes4.asp#1




    [

    These might work? I know I am reseaching these designs myself




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