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Has any installed this custom speaker box?

Discussion in 'Audio & Video' started by DooDooBrown, Jan 8, 2009.

  1. Jan 8, 2009 at 6:06 PM
    #1
    DooDooBrown

    DooDooBrown [OP] New Member

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  2. Jan 8, 2009 at 9:12 PM
    #2
    TorenApart

    TorenApart Well-Known Member

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    I've never seen that one before, but watch out for the 5'' mounting depth!
     
  3. Jan 8, 2009 at 9:13 PM
    #3
    wildjerseyfirefighter

    wildjerseyfirefighter I sell fishing and fishing accessories

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    stock, for now
    gonna need the shallow mount subs for that box.
     
  4. Jan 8, 2009 at 9:21 PM
    #4
    mneuls

    mneuls Well-Known Member

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    I have this one from supercrewsound.com

    http://www.supercrewsound.com/commerce/product.jsp?prodId=105&catId=69

    it's pretty much the same deal. It fit great, and sounds great. but as was pre-mentioned, you need to use shallow mount subs. I went with the 10" TT65's (MTX) with only 3" depth, there's lots of room. and they pound. I did have to mod the box so that the sub wouldn't hit the back of the seats though. I just cut out the box to bigger than the sub, and mounted another mdf ring inside the enclosure, so the woofer is set bask an extra 5/8"
     
  5. Jan 8, 2009 at 9:42 PM
    #5
    Mr Marv

    Mr Marv Well-Known Member Vendor

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    I normally don't comment on other peoples items but I'm still trying to figure out what kind of math these guys are using to come up with .77ft^3 per chamber. :confused:
     
  6. Jan 8, 2009 at 9:44 PM
    #6
    mneuls

    mneuls Well-Known Member

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    maybe they fill them full of water then measure the water. each enclosure, (there being two of them) is .77 cubes each. what's the big deal?
     
  7. Jan 8, 2009 at 9:59 PM
    #7
    Mr Marv

    Mr Marv Well-Known Member Vendor

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    The big deal is if you are relying on that amount of airspace to determine if your particular subs will work well in it you will be way off. I've built a fair amount of enclosures for these trucks and simple math tells me or anyone else who can multiply/divide that there is no way you can get any where near that amount of airspace with those measurements.
     
  8. Jan 8, 2009 at 10:29 PM
    #8
    mneuls

    mneuls Well-Known Member

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    i dunno dude, if each enclosure was about 1'2" long, that would put you right around .77cubic feet.
     
  9. Jan 9, 2009 at 6:47 AM
    #9
    sooner07

    sooner07 1/2 man 1/2 amazing

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    Yeah duuuude... except it isn't a rectangle, it's a trapazoid... so like, I mean the math doesn't support the .77 cft. :p
    There is also the notch that has to be cut for the cross bar in the back, that reduces internal volume.

    If the dimensions are accurate (and assuming a width of 1'2" per enclosure) you can only achieve .88cft of total displaced volume from the enclosures. But that is not taking into account the lost internal volume due to the dimensions of the building materials (listed as 5/8"). If you take that into account, you end up with .484 cuft, and this is before removing the cutout for the cross bar, which is about .05 cuft per enclosure. Marv has done these calcs more than I have (and I have plugged numbers on this problem for my truck numerous times and let him go ahead and build it for me), so I completely trust his logic on this issue.
     
  10. Jan 9, 2009 at 5:22 PM
    #10
    mneuls

    mneuls Well-Known Member

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    i dunno, I usually just fill them with water then weigh the water. it's a lot easier or some of the fiberglass ones i've seen. it's pretty simple to work out. 1 liter weighs one kilogram. and one liter is .035 cubic feet.
     
  11. Jan 9, 2009 at 8:07 PM
    #11
    sooner07

    sooner07 1/2 man 1/2 amazing

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    Understandable, and that is a great technique for fiberglass, especially if it is in an odd shape. But with MDF or particle board like most boxes (including the one we are discussing here) you can't do that. Water will destroy the material.

    I was just bored this morning, so I crunched the numbers given above.
     
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