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  1. #1
    smkmotorsports's Avatar
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    what improvment can i get????

    I've got a question!! I've got 4 audiobahn 12's (AW1200Q's) and a Mmats amp 600watts @4 ohms/2000watts @.5 ohms. I recently entered my first show and hit a 139.2 with 2 prefab boxes stacked on top of each other facing the back of my Expedition. My and was set with the gain all the way up and the internal crossover at 88 and today I was messing around and turned my boxes around and unstacked them and also turn the crossover up to around 155-165.

    What kind of difference do it make when you turn the crossover up that high? It seemed to sound 2x louder and hit 2x harder.

    And what kind of difference will a custom box make? from switching from a prefab box?

    Thanks for your help.
    ROB



    Robert Smith Jr.

    http://www.cardomain.com/id/smkmotorsports



    145.7db w/2 aw1200q's 9ft.^3 @37Hz and a Mmats d200 in a Expedition




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    Re: what improvment can i get????

    anything decently above 140 is all tiral and error, and assloads of time. the only real way is to get yourself a usb tl...build a bunch of ported boxes and expect to switch their positioning about a million+ times until u squeeze every last dB out of that truck

    and also a "custom" box is a must, and if your serious about comps tune it high with lots of airspace for those subs



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    smkmotorsports's Avatar
    smkmotorsports is offline Car Audio Competitor

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    Re: what improvment can i get????

    how do i tune a box to around 36 t0 42 Hz??????



    Robert Smith Jr.

    http://www.cardomain.com/id/smkmotorsports



    145.7db w/2 aw1200q's 9ft.^3 @37Hz and a Mmats d200 in a Expedition

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    Re: what improvment can i get????

    http://www.jlaudio.com/tutorials/ports/index.html

    theres your formula, or you could get someone on here or locally to design one for you.



    Panasonic CQ-HR1003U
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  5. #5
    Moe Lester's Avatar
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    Re: what improvment can i get????

    like i told you before, do 10-12 cubes @ 40hz with 200 square inches of port, fire the subs up and the port back. you will definately get a large gain.




  6. #6
    SPL140.2's Avatar
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    Re: what improvment can i get????

    I agree with moe lester about the cub ft. But id tune it higher than 40hz, maybe around 46,47hz. just my 2 cents



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    Re: what improvment can i get????

    not in his expedition

    hell, in order for me to peak at 51hz (the res freq of my explorer) i have to tune at 38 or 39




  8. #8
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    Re: what improvment can i get????

    i think my two tens can hit over 139 in the box theyre in right now someone get me a mic already



    DTM HATER

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