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Reload Thread: can someone check my math???

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    Terminator's Avatar
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    Icon30 can someone check my math???

    okay i have a box that is flat in the front, top, bottom and sides but the back is slanted (fits perfect in my trunk) anyway, can someone tell me the volume of my box. its made of 3/4" MDF. the dimensions are:

    front height: 14"
    bottom width: 14"
    top width: 8"
    front width: 27"
    slant length: 15"



    *'95 Del Sol VTEC
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    about 3.7814 cuft someone else should double check that though...



    when in doubt, check the ground.

    1728

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    Terminator's Avatar
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    dammit. i got 2.41 ft^3 without taking off the 3/4" all around.

    anyone else???



    *'95 Del Sol VTEC
    -To do List:-
    HU- Alpine CDA-9813 - Installed
    Front- Alpine Type-R 6.5" - Pending
    Rear- Alpine Type-R 6.5" - Pending
    Sub- 12" Rockford HX2 - Installed
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    Wireing- Stinger 4 AWG - Intalled

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    mine was after account for 3/4" mdf....and of course before driver displacement...



    when in doubt, check the ground.

    1728

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    Trixter's Avatar
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    When using 3/4" these measurements become:
    front height: 14" = 12.5
    bottom width: 14" = 12.5
    top width: 8" = 6.5
    front width: 27" = 25.5

    So let's do the rectangle first:
    12.5 x 12.5 x 25.5 / 1728 = 2.31

    And now the triangle: (w/ the base being 6 ((12.5 - 6.5 = 6))
    6 x 12.5 x 25.5 / 2 / 1728 = .55

    So:
    2.31 + .55 = 2.86

    Not what you guys got, but no matter how I do it, it's what I get.



    2006 Jeep Liberty
    Adire Audio, Cadence, Clarion, MB Quart

    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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    In your post you listed 3 widths and NO depths?
    Your box should have one width, not three.

    If this drawing is correct. You have 1.75 cuft.
    Attached Thumbnails Attached Thumbnails can someone check my math???-3333.jpg  



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    i took a second look....and my second attempt wasn't even close to the first.....i came out with... 1.82 cuft...ill try again later tonight and see what i get.....lol



    when in doubt, check the ground.

    1728

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    Trixter's Avatar
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    That is how I drew the box whan I figured it. I also got 1.75, but I checked it and I was wrong. look at my #'s above...



    2006 Jeep Liberty
    Adire Audio, Cadence, Clarion, MB Quart

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

  9. #9
    Terminator's Avatar
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    okay sorry its 27" DEEP



    *'95 Del Sol VTEC
    -To do List:-
    HU- Alpine CDA-9813 - Installed
    Front- Alpine Type-R 6.5" - Pending
    Rear- Alpine Type-R 6.5" - Pending
    Sub- 12" Rockford HX2 - Installed
    Amp- Rockford 301M or 501BD - Pending
    Wireing- Stinger 4 AWG - Intalled

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    Originally posted by Trixter
    So let's do the rectangle first:
    12.5 x 12.5 x 25.5 / 1728 = 2.31
    A 12.5 x 12.5 x 25.5 rectangle doesn't fit into this box. The top is only 6.5" deep.
    The rectangle should be 6.5 x 12.5 x 25.5, then add the triangle.
    1.199(rectangle) + .55(triangle) = 1.74 cuft.
    Attached Thumbnails Attached Thumbnails can someone check my math???-333344.jpg  



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    Trixter's Avatar
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    ahh yes...

    so I was right the first time. I took the bottom # instead of the top.



    2006 Jeep Liberty
    Adire Audio, Cadence, Clarion, MB Quart

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

  12. #12
    Terminator's Avatar
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    okay thanks guys



    *'95 Del Sol VTEC
    -To do List:-
    HU- Alpine CDA-9813 - Installed
    Front- Alpine Type-R 6.5" - Pending
    Rear- Alpine Type-R 6.5" - Pending
    Sub- 12" Rockford HX2 - Installed
    Amp- Rockford 301M or 501BD - Pending
    Wireing- Stinger 4 AWG - Intalled

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