V-shaped box design, check please

[rbenz27 10+ year member]

This is a rough sketch of what I can fit in my SUV. The 2 drawings on top are internal dimensions and the last one on the bottom is the whole enclosure made with 3/4 MDF.

I'm aiming for a 0.75 cu. ft. enclosure. I'm not sure if I calculated it correctly.

Is it accurate?

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[PSturmer 10+ year member]

no.

to find the area of a trapiziod prysim its 1/2(bhd) so it would be 0.1041 instead of .130. i would personaly make the box a rectangle for strength reasons and then add the sides on as hollow pieces

 

[boomanchu]

I got .63 internal

Those are some really shallow subs if they need less than 5" depth

 

[PSturmer 10+ year member]

well its 1/2(12 x 5 x 3) divided by 1728 = 0.052 for each chamber

 

[~Magick_Man~ 10+ year member]

what sub is going in there?

~Magick_Man~

 

[rbenz27 10+ year member]

no.
to find the area of a trapiziod prysim its 1/2(bhd) so it would be 0.1041 instead of .130. i would personaly make the box a rectangle for strength reasons and then add the sides on as hollow pieces

Thanks. I just looked at my original draft on paper and the depth of prism should be 3.75 instead of 3.

It should come out to 1.302 and 0.7552 total right?

Yes, a rectangle would be stronger but there is just no way a 0.75 rectangle enclosure would fit in the wheel well of the car. Hence, the v-shape design.