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Reload Thread: 12 L7 box help-- first ported

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    12 L7 box help-- first ported

    i currently have my 12" L7 in a small sealed box and all i read on the forums is how L7s come alive ported.dso while im redoing my whole system i figure that i'll build a ported box. BUT i've never built one and Moe Lester's dontr really fit what im looking for to fit in my trunk.

    I want to do like 2.25ft^3 @ 35hz
    Max Dimensions --
    H-17"
    W-25"
    D-15"

    What is the difference in boxes with multiple dividers to the port as appossed to a simple L-shaped port?
    Last edited by thugpassion; 03-15-2006 at 10:37 AM.



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    Re: 12 L7 box help-- first ported

    Quote Originally Posted by thugpassion
    i currently have my 12" L7 in a small sealed box and all i read on the forums is how L7s come alive ported.dso while im redoing my whole system i figure that i'll build a ported box. BUT i've never built one and Moe Lester's dontr really fit what im looking for to fit in my trunk.

    I want to do like 2.25ft^3 @ 35hz
    Max Dimensions -- H-17" W-24" D-14"

    What is the difference in boxes with multiple dividers to the port as appossed to a simple L-shaped port?
    I'm not sure I understand the question really. But If I do, the multiple dividers are needed for added port length. Low tuning in a small enclosure makes for a long port ( more port walls ). Where as the same low tuning in a larger enclosure is going to be shorter ( simple L shaped ports.



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    Re: 12 L7 box help-- first ported

    Didn't even see your dimensions there. You might not have enough room after port and sub displacement within your given dimensions. The port is gonna displace roughly a half a cuft just in volume not counting wall thickness



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    Re: 12 L7 box help-- first ported

    Quote Originally Posted by ramos
    I'm not sure I understand the question really. But If I do, the multiple dividers are needed for added port length. Low tuning in a small enclosure makes for a long port ( more port walls ). Where as the same low tuning in a larger enclosure is going to be shorter ( simple L shaped ports.
    ok thanks for clearing that up for me, i obviously know nothing about box design. that was just a side question.

    I really need someone to help me design a box.



    97 Altima, Black
    HU: Eclipse CD4000
    Sub: Kicker 04S12L74 in sealed Box
    Amps: ZX750.1 & ZX650.4
    Speakers: SS56.2 comps all around
    Knukoncepts and Tsunami wiring
    Big 3 & 150A alt

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    Re: 12 L7 box help-- first ported

    Quote Originally Posted by ramos
    Didn't even see your dimensions there. You might not have enough room after port and sub displacement within your given dimensions. The port is gonna displace roughly a half a cuft just in volume not counting wall thickness
    thats what i was worried about. i dont want to ajhve to change the config of my setup (check my avatar) i like the positioning of everything now. otherwise i'll have to push the sub to the back and put my amps on the floor in front of the box kind of like that project Kia w/ 1 L7 on Alpine amps



    97 Altima, Black
    HU: Eclipse CD4000
    Sub: Kicker 04S12L74 in sealed Box
    Amps: ZX750.1 & ZX650.4
    Speakers: SS56.2 comps all around
    Knukoncepts and Tsunami wiring
    Big 3 & 150A alt

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    Re: 12 L7 box help-- first ported

    how much bigger is moe's then u need? im about to try making one of them next week cuz ima be on spring break, don't have a tape measurer here at school so i wasn't able to see if those plans would fit or not yet




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    Re: 12 L7 box help-- first ported

    Quote Originally Posted by thai_creeper
    how much bigger is moe's then u need?
    well Moe's design doesnt fit anything i need; i want it tuned at 35hz, no more than 25"W his is 30", also his is 16.25"D i dont want to go more than 15".



    97 Altima, Black
    HU: Eclipse CD4000
    Sub: Kicker 04S12L74 in sealed Box
    Amps: ZX750.1 & ZX650.4
    Speakers: SS56.2 comps all around
    Knukoncepts and Tsunami wiring
    Big 3 & 150A alt

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    Re: 12 L7 box help-- first ported

    just checking up on responses from work.... is there anyone that can help me out?



    97 Altima, Black
    HU: Eclipse CD4000
    Sub: Kicker 04S12L74 in sealed Box
    Amps: ZX750.1 & ZX650.4
    Speakers: SS56.2 comps all around
    Knukoncepts and Tsunami wiring
    Big 3 & 150A alt

    UNDER RECONSTRUCTION - ALL KICKER

    Custom Autosport
    Atco, NJ
    (856) 753-1148
    Auto security, Sound, truck accessories

    feedback - ebay pbnation maldecido33, TheNoodPoopler, guy022077

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    Re: 12 L7 box help-- first ported

    if no one can help me design the box can you tell me how to calculate port size to tune at 35hz?



    97 Altima, Black
    HU: Eclipse CD4000
    Sub: Kicker 04S12L74 in sealed Box
    Amps: ZX750.1 & ZX650.4
    Speakers: SS56.2 comps all around
    Knukoncepts and Tsunami wiring
    Big 3 & 150A alt

    UNDER RECONSTRUCTION - ALL KICKER

    Custom Autosport
    Atco, NJ
    (856) 753-1148
    Auto security, Sound, truck accessories

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    Re: 12 L7 box help-- first ported

    How tall can you have the box? For the space you need, it will need to be around 18" tall.




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    Re: 12 L7 box help-- first ported

    17" is my max height



    97 Altima, Black
    HU: Eclipse CD4000
    Sub: Kicker 04S12L74 in sealed Box
    Amps: ZX750.1 & ZX650.4
    Speakers: SS56.2 comps all around
    Knukoncepts and Tsunami wiring
    Big 3 & 150A alt

    UNDER RECONSTRUCTION - ALL KICKER

    Custom Autosport
    Atco, NJ
    (856) 753-1148
    Auto security, Sound, truck accessories

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    Re: 12 L7 box help-- first ported

    If you could go a lil deeper you could go 4th order.

    1.3cuft sealed/1.35 ported tuned to 60-65hz.............should handle lots of power.

    Im about to build one to these specs..cant wait to hear it.



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    Re: 12 L7 box help-- first ported

    i dont understand all these bandpass orders but thanks

    would this work, disregard the bottom dimensionsa i just edited the drawing dimensions from one of Moes designs



    97 Altima, Black
    HU: Eclipse CD4000
    Sub: Kicker 04S12L74 in sealed Box
    Amps: ZX750.1 & ZX650.4
    Speakers: SS56.2 comps all around
    Knukoncepts and Tsunami wiring
    Big 3 & 150A alt

    UNDER RECONSTRUCTION - ALL KICKER

    Custom Autosport
    Atco, NJ
    (856) 753-1148
    Auto security, Sound, truck accessories

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    Re: 12 L7 box help-- first ported

    bump, im looking to buld a test box tomorrof... i calculated that (before sub displacement which idk what it is) it would be 33hz so after sub disp. would i be about 35hz? if i used polyfill woulf i be better off being that this box is only 2.2cf before sub disp?



    97 Altima, Black
    HU: Eclipse CD4000
    Sub: Kicker 04S12L74 in sealed Box
    Amps: ZX750.1 & ZX650.4
    Speakers: SS56.2 comps all around
    Knukoncepts and Tsunami wiring
    Big 3 & 150A alt

    UNDER RECONSTRUCTION - ALL KICKER

    Custom Autosport
    Atco, NJ
    (856) 753-1148
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    Re: 12 L7 box help-- first ported

    I'd go with the 4th order option

    Then again, I've spoiled myself and I can never run a "regular" box again.**** those high order bandpasses and horns.

    Anyway, drop me a PM with your AIM name if you have one and I'll see if I can help ya along.



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