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    truckstoy's Avatar
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    Icon32 want to build a new box, have a few ?'s

    i want to build a ported box for my 13w7, right now it is in the jl prowedge sealed box and would like to get a little more out of it.

    want to use areo ports and try and keep the box around the size i have now.

    was thinking 22L x 18H x 18D = 5581.12/1728 =3.22 ft3 less .21 ft3 for the sub
    now that is 3.04 ft3 internal volume.

    on the 1 site i used for a calc. using 2 4" ports on a 3 ft3 box tuned to 34htz it says port lenth of 16.6" so i will assume that is 16.6" ea. (not sure)

    ? 1. do not know how to figure out port displacement.
    ? 2. will this be a good box for my sub

    any help would be great


    mike



    BJ fisher custom ported box
    built for a 13w7, 05-10 mustang
    for sale!!!!!!


    don't just stare at it, eat it ! (O & A )




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    psych0ticnemes1 is offline Psych0tic Customs



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    Re: want to build a new box, have a few ?'s

    bump. someone help him out



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    Re: want to build a new box, have a few ?'s

    thanks kris,



    BJ fisher custom ported box
    built for a 13w7, 05-10 mustang
    for sale!!!!!!


    don't just stare at it, eat it ! (O & A )

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    Re: want to build a new box, have a few ?'s

    Let's see here

    The 16" is for each port

    Port displacement is just a matter of finding the volume of your port, then subtracting it from the volume of the enclosure. So pi*r^2*h for volume of a cylinder

    Sorry can't help ya with the enclosure size, haven't dealt with too many w7's ported



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    Re: want to build a new box, have a few ?'s

    are those outer dimension?

    if so, you'll need to make the box quite a bit bigger to make up for mdf and port displacement.




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    Re: want to build a new box, have a few ?'s

    Quote Originally Posted by xluben
    are those outer dimension?

    if so, you'll need to make the box quite a bit bigger to make up for mdf and port displacement.

    those are outer dim. so i did 20.5 x 16.5 x 16.5 = 3.22 ft3
    jl reccomends 2.375 for ported

    i wanted to keep the box as small as i could

    would a better sealed box help in my wanting more instead of the jl box

    mike



    BJ fisher custom ported box
    built for a 13w7, 05-10 mustang
    for sale!!!!!!


    don't just stare at it, eat it ! (O & A )

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    Re: want to build a new box, have a few ?'s

    Quote Originally Posted by truckstoy
    those are outer dim. so i did 20.5 x 16.5 x 16.5 = 3.22 ft3
    jl reccomends 2.375 for ported

    i wanted to keep the box as small as i could

    would a better sealed box help in my wanting more instead of the jl box

    mike

    Depends, a little larger enclosure could increase efficiency but you don't want to go too far and over power it. Ported would definately make it louder. I just don't know a good size to recommend



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    Re: want to build a new box, have a few ?'s

    this is what i have now, would like to keep it pretty much the same only a ported box, i want sub up and port to the back but on the bottom not side so i can put a window in.



    BJ fisher custom ported box
    built for a 13w7, 05-10 mustang
    for sale!!!!!!


    don't just stare at it, eat it ! (O & A )

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    Re: want to build a new box, have a few ?'s

    bump



    BJ fisher custom ported box
    built for a 13w7, 05-10 mustang
    for sale!!!!!!


    don't just stare at it, eat it ! (O & A )

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    Re: want to build a new box, have a few ?'s

    Looks like you got plenty of room there my brother . Might have to mount the amps in front of the enclosure though



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    Re: want to build a new box, have a few ?'s

    ok, with those dimensions (22 x 18 x 18) with two 4" dia 17" long ports I get:

    ~3 ft^3 net, tuned to ~33Hz

    Seems like a pretty good plan to me. I don't have experience with the driver, but it meets the manufacturer's specs quite well.

    EDIT: forgot driver displacement, it actually comes to about 2.8 @ 34.5 Hz Just add an inch to the overall height (or width) and you're back to 3 @ 33Hz.




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