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    Box Design

    I am thinking of building this box for my Alpine type R 12s they are dual 4 ohm VCs wired @ 1 Ohm to a RF 1000.1BD amp.
    can anyone tell me the cubes and let me know what the approx tuning would be? I **** at WinISD
    and bassbox pro was no help either. thanx
    Last edited by Mongo12; 06-30-2012 at 02:15 PM. Reason: added photo







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    Re: Box Design

    and the missing dimension is 22 inches sorry I didnt have the right paper in front of me
    and heres a redo showing the speaker placement if that was throwing anyone off
    Last edited by Mongo12; 06-30-2012 at 05:43 PM.




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    Re: Box Design

    Quote Originally Posted by Mongo12 View Post
    and the missing dimension is 22 inches sorry I didnt have the right paper in front of me
    and heres a redo showing the speaker placement if that was throwing anyone off
    I figured the box at 16" high, outside..at 1.6 cubes net per chamber at 42hz ...If you combine the airspace and use 1 port on one end 3" wide and the same internal length as you show, you will have 3.76 cubes net @ 33hz with about 43.5 sq in of port. What are you putting this in?




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    Re: Box Design

    The box is going in a Nissan Xterra. I already have a probox turbo bass . (tuned way too high). If I combine the chambers will I have to change the wiring or anything.. I worry about them competing if they are both in the same chamber, I have always separated the woofers

    also I can go as "high" as 22 inches if needed
    Last edited by Mongo12; 07-01-2012 at 09:51 AM. Reason: more info




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    Re: Box Design

    What are the Max dimensions you can fit?



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    Re: Box Design

    34 wide 24 tall 22 deep id prefer to have them fire up.. as I have experienced a huge amount of tailgate distortion and flexing with them firing backwards




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    Re: Box Design

    Quote Originally Posted by Mongo12 View Post
    The box is going in a Nissan Xterra. I already have a probox turbo bass . (tuned way too high). If I combine the chambers will I have to change the wiring or anything.. I worry about them competing if they are both in the same chamber, I have always separated the woofers

    also I can go as "high" as 22 inches if needed
    What amp are you using?




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    Re: Box Design

    Quote Originally Posted by quackhead View Post
    What amp are you using?
    RF 1001bd wired to 1ohm




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    Re: Box Design

    That is a mono amp..Combining the airspace will not hurt a thing. I understand you though. I felt the same way back when I ran 2 channel stereo amps on subs. The 1001bd is a good amp too btw. what tune are you looking for in the box?




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    Re: Box Design

    nothing super deep but a more full range than I get with the probox it seems high pitched - even on the low notes it just seems screechy. I listn to rock and some RnB but mostly looking for SQ and tight full kick. i considered going sealed, but never really liked sealed boxes.
    some bass samples id like to hear better would be
    Flim and the BB's -- song- Lunchhour wedding march - Great system testing jam. If you havent already listened to it give it a try (low volume the first time)
    but mostly rock and some jazz




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    Re: Box Design

    I just listened to "Tricycle"..good stuff, with lots of depth and clarity..I like.




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    Re: Box Design

    one of my favs from "back in the day" My first car audio experience was listening to Tricycle at the Alpine dealership in the owners Bronco back in '91 was life changing.
    lol so you get the punchy bass like from that album and the sq. it doesnt have to be super deep but have some good range.




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    Re: Box Design

    what are you using on the higher frequency drivers?..the pro-box was probably very peaky, they tune them high like that. I prefer to use my subs below 60hz...50hz , if I can get a smooth transition to my midbasses.




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    Re: Box Design

    Do a common chamber with a single large port.



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    Re: Box Design

    I havent got any "real" midrange, still have the factory speakers -- ***** i know---
    I think I can get by tho for now..
    I think ill take your and bucks advice and try that common chamber design and make the port 3" instead of 2 . should I keep it (the port) 22 inches as drawn?


    also my geometry doesnt add up.. i drew the top board wrong it is supposed to rest on top of the side to equal 31.5 (27.75+3+.75).
    Last edited by Mongo12; 07-01-2012 at 06:54 PM. Reason: image added




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