Need to figure out the internal volume of the following (building SEOS MTM speakers).

I know a 10" diameter tube at 12" long is roughly 0.55 ft.³. But I am going sealed and need 0.22 ft.³. So thinking maybe 8" long??????

For a 10" diameter tube, every inch in length is about 0.045 ft^3 of volume so 5" in length is about 0.22 ft^3.

Try about 4.8"

Pi times radius squared times height is the volume of a cylinder.
1728 cubic inches in a cubic foot. So .22 cubic feet would be 380.16 cubic inches.
Radius of a 10" circle is 5", squared is 25. Times Pi (3.142) = 78.54 square inches
The volume you want (380.16) divided by the area (78.54) = 4.84 inches tall.

You made me do that on my day off? Just 'cause you can't google "volume of a cylinder"?

Oh I can Googe. I just like being an ******* . Enjoy your day off

quote Originally posted by Zeb: Pi times radius squared times height is the volume of a cylinder. 1728 cubic inches in a cubic foot. So .22 cubic feet would be 380.16 cubic inches. Radius of a 10" circle is 5", squared is 25. Times Pi (3.142) = 78.54 square inches The volume you want (380.16) divided by the area (78.54) = 4.84 inches tall. You made me do that on my day off? Just 'cause you can't google "volume of a cylinder"?

Is this a three tube MTM? I can't figure out how you're going to fit three drivers in a line into a side of a tube, so I'm thinking that each midwoofer is fit to its own.

Can you post a drawing?

2 tubes. 1 8" per tube and a waveguide which needs no enclosure. I'll sketch something up

My new speakers are MTM

Pretty.

I am going this route, cause I really want to make something with my hands. I miss it ever since moving to the city and not having thr room or tools to do it.

quote Originally posted by Loki: Pretty. I am going this route, cause I really want to make something with my hands. I miss it ever since moving to the city and not having the room or tools to do it.

See guys? This is why we need a "Like" button!

Seriously, I do like this, and I wish that I had time to do anything that I "want" to do instead of those things (like plumbing and painting) that I "have" to do....

[This message has been edited by Patrick's Dad (edited 12-27-2013).]

Will also be refinishing my dads old .22 rifle. That will be easier of course, sand and stain, but still.

I also could probably not have done the H-PAS math (Hybrid Pressure Acceleration System) myself. I did, at one time, sketch out a unique pair of speakers, only to find out a few weeks later that Bob Carver was already making something very similar.

My box was more rectangular, placing threaded rods between the woofers, mechanically connecting them and increasing rigidity.

Care to share?

quote Originally posted by Zeb: Care to share?

Look at the Sunfire speaker at the link. I had this exact design in my brain, and I was figuring out which woofers to use, as the ribbon driver had a fairly low crossover point. Carver's cabinet is more of a trapezoid shape (from the top) so as to reduce standing waves in the cabinet. My concept was more of a rectangle so that I could cross brace the woofers together.

I always look for high WAF designs, although my A/Ts are hardly that, at the moment.