how do i calculate the cubic airspace of an enclosure?

[B2000]

How do i do that??

[ReversdPolarity]

ok dood the basic formula is depth x width x height (of interior dimensions not external)... but there are more complicated enclosures and what not hence resulting in multiple formulas depending on box shape size and wot not.,...
this is a site that is all u would ever need to know about anything related to car audio but there is a section in the site that does the enclosure calculations for u....
http://www.eatel.net/~amptech/elecdisc/caraudio.htm

u will find this site to be the answer to just about any question u will ever have

[MikeofTulsa]

L x W x D / 1728 = X^3


to find the internal jus subtract the displacment of the sub from the total from above

[ace7733]

how do you find the displacement of the sub?

and why do you divide by 1728?!?!?!?!?!?

[EVOECLIPSE]

on the spec sheet you get with your sub, that is where you can find its displacement.

[MikeofTulsa]

1728 is 12x12x12

basicly the number of inches in 1 cubic foot of space....thats how you convert it to ft^3

[ace7733]

oh, ok

so it's L (in inches) times W (in inches) times H (in inches) = x

x/1728 = cubic feet

[MikeofTulsa]

correct....then just subtract the cubic ft. of displacment of your sub or the cubic inches before you divide by 1728...good luck

[ace7733]

Ok, I haven't got my subs yet, so I don't know the exact figure, but I subtracted .07 ft^3 for a 12, I got that number from http://www.eatel.net/~amptech/elecdisc/caraudio.htm.