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    Help Me Tune A Box For 3 12's

    Hey Everyone,
    I have 3 kicker cvr's and It's gonna be in a Big Bronco so i have plenty of space but i wanna build it around my spare tire and angled toward the back window (from what i hear that'll make it a lil louder). SO how would i tune to to 30hz. I really have no idea what that means but from what i read 30hz is good for deep bass and to get some SPL.

    How big and long should the ports be?

    Here a idea of how i wanna try to build it:


    Thanks,
    Josh







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    Re: Help Me Tune A Box For 3 12's

    ahh hell, its tough, just pay jmac 10$ to make some plans for you











    see jmac... im gettin you somebusiness you can sen me those plans for free now





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    Re: Help Me Tune A Box For 3 12's

    Ohh and let me ask a Retarded question.....I was reading somewhere where a dude was talking about how he tuned his box to like 50somthin hz and sombody else was like, but dude, what about the girls, and he said don't worry i have another box tuned to 20somthin hz. SOOO what i'm gettin' at is why is a lower hz better for the chicks? the vibarations or somthing?




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    Re: Help Me Tune A Box For 3 12's

    umm.. the higher it is like in the 40's the more the spl anything around 43-50 would be for competition only.. 20 is for like pure sq.. and is waaay too low. i doubt u would even hear most of the music.



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    Re: Help Me Tune A Box For 3 12's

    I i guess i'll try and stay in the 30's




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    Re: Help Me Tune A Box For 3 12's

    mmm vibrations





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    Re: Help Me Tune A Box For 3 12's

    do you have any approximate dimensions?




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    Re: Help Me Tune A Box For 3 12's

    when i had my old ported box with 2 15's it was about 22"deep 22"high and 44" wide




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    Re: Help Me Tune A Box For 3 12's

    This Big:

    It might even be bigger than what i remember but i do know that i don't want it no bigger than that




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    Re: Help Me Tune A Box For 3 12's

    those ports just look like wholes without the tube. according to bass box pro, the EPB (efficiency) of your sub is 22, so it would do well in a sealed box. if you think you can **** it up and have a sealed box, here are some dimensions that would have each chamber tuned at exactly 30 Hz:

    L * W * H

    21.75 * 48 * 18

    seperated into three equal sections.




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    Re: Help Me Tune A Box For 3 12's

    sorry, program accidentally assumed heavy dampening was used. the actual dimensions are as follows:

    18 * 48 *18




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    Re: Help Me Tune A Box For 3 12's

    3 ft per sub sounds pretty big for cvr's...



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    Re: Help Me Tune A Box For 3 12's

    the VAS for the 12 CVR on BBP6 lists 3.278 ft^3. perhaps theyre wrong. i dont know much about the sub.




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    Re: Help Me Tune A Box For 3 12's

    just checked the kicker wevsite and they also claim 3.28 ft.^3




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    Re: Help Me Tune A Box For 3 12's

    i had 2 12"cvr's in 1.25 sealed a piece. and they hit pretty hard.. but since i've started building my own boxes, i'd take ported any day. my boxes are tuned between 30-33. nice and low but still loud.



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