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Reload Thread: Box for 15" elemental

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    coolman91985's Avatar
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    Icon32 Box for 15" elemental

    i have an elemental designs 15" dual 2ohm sub (k-series). i need to make a box that will fit in my trunk and still give me some room to use it. i will be running about 450 watts to it daily. here are the measurements i have to work with:

    37x11x16.5

    what can i do with these #'s? i want it to be ported as well so i need someone to help me figure out all of the measurements.

    any help is very appreciated







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    coolman91985's Avatar
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    please, someone help...




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    Mercureie's Avatar
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    im in the middle of building a sealed box for that same driver, dimensions are H-17" W-18" and D-19" about 2.5 cuft after displacement. dunno if this helps any since it a sealed box but if ya change ur mind and wanna go sealed there ya are



    Car:'02 Nissan Xterra
    HU: Premier DEH-4400
    Comps: SPR-176A type-r 6.5's
    Comp amp: Zapco reference 200
    Sub:Re 15HC
    Sub amp: Hifonics Bx1000
    Box: 2.5 cuft sealed

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    coolman91985's Avatar
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    i dont need new numbers, i just need to know how many cu. ft. im going to get out of it if it is that size. the measurements might be too big and i might have to change them. how do i figure out how many cu. ft. that is?




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    ShaunMac's Avatar
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    using 3/4" MDF you'll have about 2.93cu ft.

    -2.84cu ft after subwoofer displacement.

    -e15k .085cu ft displacement

    That should be big enough to go ported.
    What freq do you want the box tuned at?

    I'm building a 3.5cu ft ported box for an e15k right now.
    Tuned @33Hz
    I'll have it running tomorrow.



    Pioneer 8600 - Profile Amp-Infinity Speakers - L7 Subwoofer

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    coolman91985's Avatar
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    i dont know anything about frequences or any of that. how big does my port have to be?




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    coolman91985's Avatar
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    how did u figure how many cu. ft. mine was?




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    Originally posted by coolman91985
    i dont know anything about frequences or any of that. how big does my port have to be?
    Well the freq the box is tuned at directly effects the
    length of the port.
    Higher freq = more SPL "louder" = shorter port
    Lower freq = more SQ "better sound quality" = longer port

    LxWxH=total cubic inches
    then divide by 1728 to get cubic feet

    The thickness of the material used has to factored in as well.
    You have to subtract the thickness of material to get the
    internal volume of the box.

    Do you plan on slot porting the box?



    Pioneer 8600 - Profile Amp-Infinity Speakers - L7 Subwoofer

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    coolman91985's Avatar
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    i dont know. should i? whats the difference?




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    Yes I would use a slot port because you will be able
    to tune lower with your box size.

    It will give you more port volume.

    Are you more into SPL or SQ?
    This will help determine a tuning freq.



    Pioneer 8600 - Profile Amp-Infinity Speakers - L7 Subwoofer

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    coolman91985's Avatar
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    i like the thump, but i want to be able to hear the words clearly and have clear bass. i hope that helps...




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    For a good mix of SQ and SPL a tuning
    freq around 33Hz would be fine.

    With your dimensions you could use a slot port
    that is 15" x 2" opening and is 20" long.

    The port area is 30sq in. fine for e15k

    This size port should give you a tuning freq
    right around 33-34Hz.

    The longer the port the lower the freq.
    Which will give you deeper bass.

    The shorter the port the higher the freq.
    Which will give you louder bass but not as deep.

    Here's a sketch of the slot port box design.
    Attached Thumbnails Attached Thumbnails Box for 15" elemental-sss.jpg  



    Pioneer 8600 - Profile Amp-Infinity Speakers - L7 Subwoofer

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    coolman91985's Avatar
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    that doesnt look easy to make... is it easier than it looks?




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    my box is only going to be 11" deep. do i have room for this?

    With your dimensions you could use a slot port
    that is 15" x 2" opening and is 20" long.




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    It depends on if your good at woodworking.

    You just have to take your time and double check
    everything before you cut your wood.

    Have you made a subwoofer box before?

    Use 3/4" MDF medium density fiberboard. Works great!
    Usually about $18 for a 4'x8' sheet at LOWE"S
    or Home Depot.



    Pioneer 8600 - Profile Amp-Infinity Speakers - L7 Subwoofer

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