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    amedeuce's Avatar
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    Another check my box calculations with pics (sketchup) post

    This is for a 12" magnum
    I'm hoping that I did this right and the box is around 1.8 cubes net tuned around 30hz.
    the box is 24x16x17 outside dim. WIth 3/4 inch mdf.
    The port is 14.5 x 2 and around 48 inches of port if I measured correctly.
    Here are the sketchup pics


    Look of box



    Outside dimensions



    Top View



    side view



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    Quote Originally Posted by bumpin buick View Post
    /yourself
    Quote Originally Posted by elmor001 View Post
    I don't think I'm the dumb one here. You just told someone to go divide themself.

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    Re: Another check my box calculations with pics (sketchup) post

    **** you! What program did you use to do the mockups with, btw looks nice.



    Quote Originally Posted by kickerassman View Post
    i was thinking some thing like this..... get a reall fine but strong sharp cable like them tension cables tie it around your neck and tie it to something..... then get some supper supper supper glue and glue your hands to your head.when the glue dries jump of the building with the cable cutting your head off and you would have your head glued to your hands ...... some one would see that and be like wtf omg that dude ripped his head off ... he mst have been pisssed!!!



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    Re: Another check my box calculations with pics (sketchup) post

    sketchup



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    Quote Originally Posted by bumpin buick View Post
    /yourself
    Quote Originally Posted by elmor001 View Post
    I don't think I'm the dumb one here. You just told someone to go divide themself.

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    Re: Another check my box calculations with pics (sketchup) post

    lol ameduce... my greatest condolences for not being able to design you one.. i still don't have AutoCAD on my computer, or else I would have designed you one already

    Very sorry! if you still want me to, i'll try to download a copy and get one done for ya




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    Re: Another check my box calculations with pics (sketchup) post

    Quote Originally Posted by GCAdidas13
    lol ameduce... my greatest condolences for not being able to design you one.. i still don't have AutoCAD on my computer, or else I would have designed you one already

    Very sorry! if you still want me to, i'll try to download a copy and get one done for ya
    well are you saying this isn't right?



    References

    Sold to jamesdean,jonny101abc,LowLinc,bumpinaintEZ,TurboDu devr4,SVT RELAMPAGO,mk_ ,Burnout956,bonesninja,yenwen,bhsdriller,dalucifer ,BoondockSaints,WillyG4444, alfmoney,btnhfan,dB Dom

    Bought From TeamPSI,ace_800, Zxcvtypo,bjfish11,atoz350,timbre-audio,Derrick824, lastcall,eclipsefool,rtillaree,PioneerPimp,6spdcou pe,ctmike,Thieroff


    Quote Originally Posted by bumpin buick View Post
    /yourself
    Quote Originally Posted by elmor001 View Post
    I don't think I'm the dumb one here. You just told someone to go divide themself.

    H/U Alpine 9887
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    Tweets LPG 25NFA
    Subs 2 10" Memphis Audio Shallow Mount Subs
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    Re: Another check my box calculations with pics (sketchup) post

    Quote Originally Posted by ameduece
    well are you saying this isn't right?
    No i haven't checked it. I'll run it through right now...

    volume before sub displacement: 1.85 cubes
    i'll take out .07 for sub (that's the actual displacement for SI Mag 12's

    if you have 1.78 cubes after displacement, and your port is 48 inches, you have a tuning closer to 28.5 hz.

    checking your port length measurement...

    vertical one: 15.25 (this is from the opening to halfway through the joint)
    horiz one: 2.75 (halfway through first joint to halfway through second joint)
    vert two: 13.5 (halfway through second joint to halfway through third joint)
    horiz two: 2.75 (you get the idea...)
    vert three: 13.5
    horiz three: 1.75 (halfway through last joint to opening of port into box)

    add all together and get 49.5

    you have a 1.78 cubic foot box tuned to 28 hz after you drop the sub in.

    This is all straight from WinISD

    if you want a different tuning, design a new one and take off about 5" of port. That will probably get you to 30hz




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    Re: Another check my box calculations with pics (sketchup) post

    Quote Originally Posted by GCAdidas13
    No i haven't checked it. I'll run it through right now...

    volume before sub displacement: 1.85 cubes
    i'll take out .07 for sub (that's the actual displacement for SI Mag 12's

    if you have 1.78 cubes after displacement, and your port is 48 inches, you have a tuning closer to 28.5 hz.

    checking your port length measurement...

    vertical one: 15.25 (this is from the opening to halfway through the joint)
    horiz one: 2.75 (halfway through first joint to halfway through second joint)
    vert two: 13.5 (halfway through second joint to halfway through third joint)
    horiz two: 2.75 (you get the idea...)
    vert three: 13.5
    horiz three: 1.75 (halfway through last joint to opening of port into box)

    add all together and get 49.5

    you have a 1.78 cubic foot box tuned to 28 hz after you drop the sub in.

    This is all straight from WinISD

    if you want a different tuning, design a new one and take off about 5" of port. That will probably get you to 30hz

    Thanks!!! So I was (am) very close to what I'm looking for..
    Can I just knock off 5 inches from the first part of the port.
    And I already had the sub displacement figured in at .1 cubic ft..



    References

    Sold to jamesdean,jonny101abc,LowLinc,bumpinaintEZ,TurboDu devr4,SVT RELAMPAGO,mk_ ,Burnout956,bonesninja,yenwen,bhsdriller,dalucifer ,BoondockSaints,WillyG4444, alfmoney,btnhfan,dB Dom

    Bought From TeamPSI,ace_800, Zxcvtypo,bjfish11,atoz350,timbre-audio,Derrick824, lastcall,eclipsefool,rtillaree,PioneerPimp,6spdcou pe,ctmike,Thieroff


    Quote Originally Posted by bumpin buick View Post
    /yourself
    Quote Originally Posted by elmor001 View Post
    I don't think I'm the dumb one here. You just told someone to go divide themself.

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  8. #8
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    Re: Another check my box calculations with pics (sketchup) post

    Looks similar to the deathbox.



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    Re: Another check my box calculations with pics (sketchup) post

    Quote Originally Posted by SPL140.2
    Looks similar to the deathbox.
    ??



    References

    Sold to jamesdean,jonny101abc,LowLinc,bumpinaintEZ,TurboDu devr4,SVT RELAMPAGO,mk_ ,Burnout956,bonesninja,yenwen,bhsdriller,dalucifer ,BoondockSaints,WillyG4444, alfmoney,btnhfan,dB Dom

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    Quote Originally Posted by bumpin buick View Post
    /yourself
    Quote Originally Posted by elmor001 View Post
    I don't think I'm the dumb one here. You just told someone to go divide themself.

    H/U Alpine 9887
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    Re: Another check my box calculations with pics (sketchup) post

    Quote Originally Posted by ameduece
    Thanks!!! So I was (am) very close to what I'm looking for..
    Can I just knock off 5 inches from the first part of the port.
    And I already had the sub displacement figured in at .1 cubic ft..
    Yea man I just did the figuring... You'll be really close to 30. Like 29.5 hz, and that's a good tuning.

    Make the piece of wood that is nearest the inside of the box 5" shorter. This one:





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    Re: Another check my box calculations with pics (sketchup) post

    Thanks again...
    I'll post pics of the build when I get time to build it...



    References

    Sold to jamesdean,jonny101abc,LowLinc,bumpinaintEZ,TurboDu devr4,SVT RELAMPAGO,mk_ ,Burnout956,bonesninja,yenwen,bhsdriller,dalucifer ,BoondockSaints,WillyG4444, alfmoney,btnhfan,dB Dom

    Bought From TeamPSI,ace_800, Zxcvtypo,bjfish11,atoz350,timbre-audio,Derrick824, lastcall,eclipsefool,rtillaree,PioneerPimp,6spdcou pe,ctmike,Thieroff


    Quote Originally Posted by bumpin buick View Post
    /yourself
    Quote Originally Posted by elmor001 View Post
    I don't think I'm the dumb one here. You just told someone to go divide themself.

    H/U Alpine 9887
    Mids Seas ER18RNX
    Tweets LPG 25NFA
    Subs 2 10" Memphis Audio Shallow Mount Subs
    Mids/Tweets Amp Kicker ZX850.4
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    Re: Another check my box calculations with pics (sketchup) post

    Looks similar to the deathbox.
    Decware's Deathbox...

    http://www.decware.com/newsite/mainmenu.htm

    Works off a little different design; your box is the common labyrinth slot port design, allows a lot of port length in a small area.




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