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    Ported 15" Brahma Suggestions

    I just bought a 15" Brahma and i am going to get a ported box for it. I have a Hifonics BX1500D amp that i am going to be running at 1 ohm. What frequency should i tune the ported box to? and would 18" Height 32"Width 20" Depth be to big? I am looking for mostly spl.







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    Re: Ported 15" Brahma Suggestions

    http://www.adireaudio.com/Files/cut%...20Brochure.pdf i can tell you are new, that site is confusing. they have all the box spec's on there




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    Re: Ported 15" Brahma Suggestions

    I made mine 30"l x 17"d x 16"h (28.5"l x 15.5"d x 14.5"h) and a port that was 2"w x 14.5"h x 21.5"l. This gives me 3cu' tuned to 28Hz. I this is the 4th box I have made for my 15" Brahma and it sounds the best.

    BTW: I am using a Cadence A7hc for my amp (1200w-1400w rms)




    2006 Jeep Liberty
    Adire Audio 15" Brahma running off Cadence A7hc, Clarion hu, MB Quart 6.5s and 5.25s running off old school Punch 800a4

    146+db @ 38hz with 1200w and a single 15"

    Lv = [(14630000 x R^2) / (Fb^2 x Vb)] - 1.463R
    *Vb = vol. in cu"
    **R = sq.rt. A / Pi (for square/slot port)

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    Re: Ported 15" Brahma Suggestions

    trixter- you say the box mentioned above sounded best, what were the dimensions for the other three boxes you had made for the 15B?




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    Trixter's Avatar
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    Re: Ported 15" Brahma Suggestions

    One was 4cu' (net) with a port that was 2.5" x 14.5" and tuned to 30Hz. The other one was 4.5cu' (net) and tuned to 38Hz using two 4" Precision ports. This box sounded pretty good but I could tell it was still too big for the power I was using. I also tried a 5cu' box tuned to 25Hz using 4 4" ports; sounded pretty bad. Kinda funny, after all this trial and error and I end up with the box dimensions that Adire recommends....go figure.



    2006 Jeep Liberty
    Adire Audio 15" Brahma running off Cadence A7hc, Clarion hu, MB Quart 6.5s and 5.25s running off old school Punch 800a4

    146+db @ 38hz with 1200w and a single 15"

    Lv = [(14630000 x R^2) / (Fb^2 x Vb)] - 1.463R
    *Vb = vol. in cu"
    **R = sq.rt. A / Pi (for square/slot port)

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