Trying to figure out volume?

[WildOne]

I have 2 round heavy duty containers and they measure 18" deep by 25" around.

I want to make a couple Bass speakers out of them and need to figure out the volume so I can decide on a speaker to fit. I would like to go with 15s

WO

[chris661]

25" diameter would be 12.5" radius.

using h*pi*r^2, 18*156 = 8822 cubic inches. There are volume converters all over the web, so find one and convert to litres, cubic feet or whatever you like.

[Cal Weldon]

Not to get picky but I get 8836 in^2. Are these internal dimensions?

[WildOne]

outside measurements. If I remember right the last time I built a speaker box it was something like 1.5 cubic feet? or something. I am just trying to determine what speaker to buy for a good woofer. It is going to be sealed, But I could add a tube if really necessary for better sound. I want tight strong bass..

Thanks
WO

[Cal Weldon]

Measure the inside.

If you are looking for "tight" bass consider a PA driver.

[David McBean]

Originally Posted by Cal Weldon

Not to get picky but I get 8836 in^2.

Hi Cal,

Don't you mean 8836 in^3?

Yes, I know I'm being "picky" - just couldn't resist it :-).

Kind regards,

David

[chris661]

Yeah, fair enough, I missed the .25in^2 off the end area. Just did 13*12 instead... Neath trick there:
For a (number+0.5)^2, you can use n(n+1)+0.25.

Chris

[Cal Weldon]

Originally Posted by David McBean

Hi Cal,

Don't you mean 8836 in^3?

Got me!