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View Full Version : Sealed enclosure capacity



Goro
01-03-2003, 03:39 PM
I recently found a custom built enclosure: 3/4 MDF cube form 14"x14"x14" for a single 12" subwoofer.
The only thing I don't know about this box is the capacity in cubic feet.
Maybe someone could hep me out telling me how much is this box capacity? The seller doesn't know about it. I'm from Europe and not very much familiar with non-metric dimensions, so don't know how to count...

TheGrimReaperKD
01-03-2003, 03:40 PM
I'm interested in finding out the formula as well.

BigRedMonkey
01-03-2003, 04:00 PM
Does 1.588 cu. feet sound about right? I'm pretty sure you just convert inches to feet and multiple that **** to get the volume

Grateful
01-03-2003, 05:09 PM
All you do is multiply the three numbers together.Which in yor case it comes out to 2744.Then divide it by 1728 and theres yor answer.1.5879629.But then you can round off from their.

BigRedMonkey
01-03-2003, 11:18 PM
go with what jmac said ;)

Matador
01-04-2003, 02:58 AM
jmac is right, sounds bout right

ridered36
01-04-2003, 08:42 PM
Originally posted by Grateful
All you do is multiply the three numbers together.Which in yor case it comes out to 2744.Then divide it by 1728 and theres yor answer.1.5879629.But then you can round off from their.

Where did u get the 1728 from?

MikeofTulsa
01-04-2003, 08:47 PM
12"x12"x12"=1728" = 1 cu ft

ridered36
01-04-2003, 09:03 PM
Originally posted by Goddyd4me
12"x12"x12"=1728" = 1 cu ft

OK, so when u are trying to find out how much space u take:
total amount (X) / 1728=total cubic feet?

is that how it's done?

nswartley
01-04-2003, 09:07 PM
lol dont they teach volume calculations up in san fran? they do in the south bay :p

MikeofTulsa
01-04-2003, 09:08 PM
yep...that'll give u cu ft

BigRedMonkey
01-04-2003, 09:42 PM
if you're using external dimensions... just don't forget to take away the width of the wood you have on the box like I did ;)

ridered36
01-04-2003, 09:48 PM
OK, now that i know how to find out internal space, how do i figure it with the sub in there and the port/s?

MikeofTulsa
01-04-2003, 09:52 PM
just subtract the displacement of the sub and the port volume......dont quite remember the volume for a cylinder but if memory serves me right its area of circle x length

TRAVIESO
01-04-2003, 10:29 PM
I heard somewere that its not good to put a sub in a perfect cube. EX. 14" x 14" x 14"

MikeofTulsa
01-04-2003, 11:03 PM
where ever u heard that its incorrect

Savant
01-05-2003, 01:54 AM
Originally posted by Jmac
If that's bad then why do most high-end home audio companies use a cube box ?

Cause it looks good and sells subs? ;)

Why do some places suggest any off the shelf band pass box since they are all perfectly designed/optimized, even when they just got done saying you have to tailor boxes for specific speakers? :D

I have read that cubes can cause cancelations.. but probably not to a serious degree.. I have no idea if it does or not *shrug*