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Reload Thread: box for 2) HD315's Please?

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    box for 2) HD315's Please?

    for 2) HD3 15"s amp is an MM4000.1D

    34" wide (can go to 38" if you must)
    26" deep (can go to 30" if you must)
    16.5" tall

    tuned to around 38Hz

    just a daily driver but i would love it to SLAM. Port/Subs rear facing prefered... Or subs rear and port forward (firing into cabin) if you think that would be best...

    Thank You







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    Re: box for 2) HD315's Please?

    subs/port won't fit on the same baffle, not enough room....




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    Re: box for 2) HD315's Please?

    Quote Originally Posted by mlstrass View Post
    subs/port won't fit on the same baffle, not enough room....
    how long are your ports? I know that AQ says 16" long, this tunes it to 40hz...would like to know.



    Active Front Tweeters:Seas Neo Alumn.

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    Re: box for 2) HD315's Please?

    Type of Vehicle?




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    Re: box for 2) HD315's Please?

    Quote Originally Posted by Kenneth10483 View Post
    Type of Vehicle?
    1986 chevy caprice



    Active Front Tweeters:Seas Neo Alumn.

    Midbass:ID OEMs
    Mids & Highs amp PPI DCX1000.4
    Subs 2-12 Si Mags 2nd gen.
    Box ported tuned to 34hz 2.17 cu.ft dual chambers
    Sub amp Kicker KX2500.1

    H/U:Alpine 9815
    Doors and Trunk are deaden by SS
    PPI MAN

    REFS:2lows10, XylerB, Scoobasteve, Ksin291,TheLow, Amokie , MemphisSoul4u , TheHardKnoxLife , RydHy3845 ,GORDOS420 , Mihklo,Jameseypoo , integra88

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    Re: box for 2) HD315's Please?

    I have tried subs rear facing and port to the side in trunk cars and it sounded the best like that but hey half of the people on this forum never listen to anything I say anyway so whats the difference I dont know anything!!!

    I would do the dimensions listed about with about 60" of port about 14" long subs facing rear and port to the side of the box passenger side
    Last edited by Kenneth10483; 04-19-2008 at 08:05 AM.




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    Re: box for 2) HD315's Please?

    Quote Originally Posted by Kenneth10483 View Post
    Type of Vehicle?
    Mine is a '99 Cadillac Eldorado




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    Re: box for 2) HD315's Please?

    Quote Originally Posted by Kenneth10483 View Post
    I have tried subs rear facing and port to the side in trunk cars and it sounded the best like that but hey half of the people on this forum never listen to anything I say anyway so whats the difference I dont know anything!!!

    I would do the dimensions listed about with about 60" of port about 14" long subs facing rear and port to the side of the box passenger side
    thanks I`m listening regardless what anybody else thinks.



    Active Front Tweeters:Seas Neo Alumn.

    Midbass:ID OEMs
    Mids & Highs amp PPI DCX1000.4
    Subs 2-12 Si Mags 2nd gen.
    Box ported tuned to 34hz 2.17 cu.ft dual chambers
    Sub amp Kicker KX2500.1

    H/U:Alpine 9815
    Doors and Trunk are deaden by SS
    PPI MAN

    REFS:2lows10, XylerB, Scoobasteve, Ksin291,TheLow, Amokie , MemphisSoul4u , TheHardKnoxLife , RydHy3845 ,GORDOS420 , Mihklo,Jameseypoo , integra88

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    Re: box for 2) HD315's Please?

    Did mine at 18" for a 38Hz tune, but extened it to about 21" for a 35Hz tune. Box is 38 1/2" wide and around 18 1/2" high and the subs JUST fit by staggering mounting them a little. Also with your box being shorter you'll need a wider port to get enough port area, that's why I said no way putting subs/port on the same side.

    I'd do port out the side, only real way to make it work. HD's sound very good at 35Hz and still slam. I do want to go back to 38Hz just to see how it sounds not that I've got my front stage dialed in better.




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    Re: box for 2) HD315's Please?

    Quote Originally Posted by mlstrass View Post
    Did mine at 18" for a 38Hz tune, but extened it to about 21" for a 35Hz tune. Box is 38 1/2" wide and around 18 1/2" high and the subs JUST fit by staggering mounting them a little. Also with your box being shorter you'll need a wider port to get enough port area, that's why I said no way putting subs/port on the same side.

    I'd do port out the side, only real way to make it work. HD's sound very good at 35Hz and still slam. I do want to go back to 38Hz just to see how it sounds not that I've got my front stage dialed in better.
    so is your port 7" wide?



    Active Front Tweeters:Seas Neo Alumn.

    Midbass:ID OEMs
    Mids & Highs amp PPI DCX1000.4
    Subs 2-12 Si Mags 2nd gen.
    Box ported tuned to 34hz 2.17 cu.ft dual chambers
    Sub amp Kicker KX2500.1

    H/U:Alpine 9815
    Doors and Trunk are deaden by SS
    PPI MAN

    REFS:2lows10, XylerB, Scoobasteve, Ksin291,TheLow, Amokie , MemphisSoul4u , TheHardKnoxLife , RydHy3845 ,GORDOS420 , Mihklo,Jameseypoo , integra88

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    Re: box for 2) HD315's Please?

    8" wide port. Had to remove the rubber gaskets and add a little piece on the right side of the box to make em fit....




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    Re: box for 2) HD315's Please?

    You can see the extra piece of 3/4" on the right side...





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    Re: box for 2) HD315's Please?

    Quote Originally Posted by mlstrass View Post
    You can see the extra piece of 3/4" on the right side...

    I don`t think I`ll have that problem becuase of the type of car it is going in a 1986 Chevy caprice which is wider then your car my internal measurements for the box is38.5"w x 18.5"h x 21"d =8.42 cu.ft. ...with spkr displ for 2 15s =.46 cu.ft. so 8.4-.46=7.94 cu.ft now do I have to add the port to the 8.4 cuft. of the box? or better yet how wide is your box and how high and how deep? for my box including port it is 47 inches wide externaly.



    Active Front Tweeters:Seas Neo Alumn.

    Midbass:ID OEMs
    Mids & Highs amp PPI DCX1000.4
    Subs 2-12 Si Mags 2nd gen.
    Box ported tuned to 34hz 2.17 cu.ft dual chambers
    Sub amp Kicker KX2500.1

    H/U:Alpine 9815
    Doors and Trunk are deaden by SS
    PPI MAN

    REFS:2lows10, XylerB, Scoobasteve, Ksin291,TheLow, Amokie , MemphisSoul4u , TheHardKnoxLife , RydHy3845 ,GORDOS420 , Mihklo,Jameseypoo , integra88

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    Re: box for 2) HD315's Please?

    you know... I think i am just gonna hand this thread on over to you guys!

    I'll start my own




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    Re: box for 2) HD315's Please?

    Box is 38 1/2" wide and 18 1/2" high, don't remember how deep off the top of my head. Goes all the way back and touches the back trunk wall. Think it's around 28" deep...

    You would subtract the space the aero's will take up, so that box is not big enough as you'll also need bracing in there.

    You can fit 47" wide in your car???




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