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View Full Version : Box DIM. airspace, am I right?



Afboy143
06-13-2003, 11:45 PM
20 " width x 8" bottom depth X 3" top depth X 18" heigh, using 3/4 MDF this would come out to 1.450 right? Its like a slant box ona truck

Randy Savage
06-13-2003, 11:51 PM
I came up with 0.84...

ss3079
06-13-2003, 11:59 PM
I came up with 0.707...

Uh oh...

- Steve

evo2k3
06-14-2003, 12:03 AM
[(20-1.5)*(5.5-1.5)*(18-1.5)]/1728 = 0.706 ft^3

the 5.5 is the average of the bases since it is a trapaziod.....thats what i get?

Woodmister
06-14-2003, 12:10 AM
Ive got 0.83908cuft

http://www.the12volt.com/caraudio/boxcalcs.asp (Volume Calculator - Wedge Enclosures 2)

Afboy143
06-14-2003, 12:12 AM
Hey woodmister, those calcs are awsome thanks. Everyone else thanks for the help, i guess i was way off, first time i did it :-)

slipknot87420
06-14-2003, 12:24 AM
http://www.eatel.net/~amptech/elecdisc/spboxnew2.htm


i got .707 :confused:

Afboy143
06-14-2003, 12:31 AM
I like wood misters calculator so much better, the one u had slipknow, look at what it measures, where the side wood ends ont he bottom peice. Like wood mister's calc measures the whole bottom as urs only measure the bottom where other wood isnt touching

slipknot87420
06-14-2003, 12:33 AM
yeah....but you want internal dimensions right?

slipknot87420
06-14-2003, 12:36 AM
ok dont believe me...do on a calculator:)

Afboy143
06-14-2003, 12:36 AM
Yeah I want the internal volume but I gave the external dimensions, so doesnt the calc take out the 3/4 all the way around? I dont know i give up lol ill jus go wit wood mister

slipknot87420
06-14-2003, 12:41 AM
18.5x4x16.5/1728 go put that in a calculator:)

Woodmister
06-14-2003, 12:44 AM
20 " width - 1.5 = 18.5
8" bottom depth - 1.5 = 6.5
3" top depth - 1.5 = 1.5
18" heigh - 1.5 = 16.5

18.5 x 4 x 16.5 = .7065

What sub is it? The box can be a lil big, it can produce more bass...

evo2k3
06-14-2003, 01:23 AM
anybody look at mine...good old fashion mathmatics....its just the volume of a trapazodial prism....still sticking by my 0.706 messurement.....since a few others got that as well....im pretty sure it is correct.

Trixter
06-14-2003, 11:40 AM
Count me as another one that got 0.7.

Woodmister
06-14-2003, 11:43 AM
Yea, that cac might be wrong or somthin. I also got the .706cuft when doing it free hand.