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BassBoomer
03-16-2003, 09:00 PM
can some one figure out the cubic feet of this box?

biggmarc
03-16-2003, 09:05 PM
http://www.eatel.net/~amptech/elecdisc/caraudio.htm




go to enclosure calculations

80_Cutlass_mn
03-17-2003, 12:04 AM
I got roughly 5.3 +- a few 10th's cu ft. Anyone agree?

flyg20
03-17-2003, 12:36 AM
i got about 5.607638889 cu ft, not factoring in the airspace for the woofer and port volume.

jefe1
03-17-2003, 12:38 AM
ok here what i got.......................

34 w, (b27+t5)/2, (13h1+7h2)/2

34 x 16 x 10 = 5440/ 1728 = 3.15 cuft


thats the way to make a wedge box where you have, bottom plus top, you must divide itby two and the result is one of the measures you multiply by the height and widht


im here to learn if im wrong let me know....................


saludos from mexico :D

jefe1 :nono: :D :nono: :D :nono:

flyg20
03-17-2003, 12:52 AM
jefe1 you are wrong.

according to my geometry lessons:
separate the volume into sections to simplify. so, we got a rectangle at 13X5X34, another rectangle at 22x7x34, and a triangular prism with base 22 x height 6.

13x5x34=2210
22x7x34=5236
.5(22)x6x34=2244


(2210+5236+2244)/1728= 5.607638889 CUBIC FEET


learn

Trixter
03-17-2003, 12:13 PM
Heres what I came up w/...

Divide the box into 2 rectangles and a triangle....

rec. 1: 13 x 5 x 34 / 1728 = 1.28
rec. 2: 22 x 7 x 34 / 1728 = 3.03
the tri.: 6 x 22 x 34 / 2 / 1728 = 1.30
the total: 1.28 + 3.03 + 1.30 = 5.61

(I calculate triangles a little differently, but I think it's easier this way.)

flyg20
03-17-2003, 09:12 PM
exactly

BassBoomer
03-17-2003, 10:47 PM
Originally posted by Trixter
Heres what I came up w/...

Divide the box into 2 rectangles and a triangle....

rec. 1: 13 x 5 x 34 / 1728 = 1.28
rec. 2: 22 x 7 x 34 / 1728 = 3.03
the tri.: 6 x 22 x 34 / 2 / 1728 = 1.30
the total: 1.28 + 3.03 + 1.30 = 5.61

(I calculate triangles a little differently, but I think it's easier this way.)

uve been a great help. :D and now im wondering if u can get me the internal volume using 3/4 in. mdf? and no port, or driver.

Trixter
03-17-2003, 11:23 PM
lets see....

base: 25.5"
front: 6.25
back: 11.5"
top: 4.25"
width: 32.5"

plug the number in and you get....
rec. 1: 11.5 x 4.25 x 32.5 / 1728 = 0.92
rec. 2: 21.25 x 6.25 x 32.5 / 1728 = 2.5
tri. : 21.25 x 5.25 x 32.5 / 2 / 1728 = 1.05
toatl: 0.92 + 2.5 + 1.05 = 4.47

jefe1
03-19-2003, 02:03 AM
many thanks friends for this geometry lesson and you are right...................


saludos from mexico

jefe1

BassBoomer
03-19-2003, 02:07 AM
Originally posted by Trixter
lets see....

base: 25.5"
front: 6.25
back: 11.5"
top: 4.25"
width: 32.5"

plug the number in and you get....
rec. 1: 11.5 x 4.25 x 32.5 / 1728 = 0.92
rec. 2: 21.25 x 6.25 x 32.5 / 1728 = 2.5
tri. : 21.25 x 5.25 x 32.5 / 2 / 1728 = 1.05
toatl: 0.92 + 2.5 + 1.05 = 4.47

4.47 is the internal right? thanks for all the help guys :D

Trixter
03-19-2003, 11:24 AM
I divided the box up a few different ways to check the math and still came up w/ the same number. 4.47-4.46 somewhere in there.

biggmarc
03-19-2003, 01:00 PM
what about the width of the enclosure how do u get ft3 if you don't have it or the port size and lenght

Trixter
03-19-2003, 08:31 PM
The width of the enclosure is 32.5 (34 - (.75 x 2) = 32.5). As he said in his above post, "....and no port, or driver."

We can't figure out the displacement of the port (or the driver for that matter) 'cause he did not provide the info.

BassBoomer
03-20-2003, 12:36 AM
the driver is most likely gonna be 2 re se 10's and i dont think i have enough volume to go ported either.