Ok I'm finally back and settled in. I've been run off my feet lately and looking forward to this weekend. Kind of an interesting thing for work, a town I live near has underground mines all over the place. One of them opened up under a fairly major road near downtown. It was a truck route. So I've been buried deep in that project trying to solve the problem. Trucks were driver over a 20x20 area of soil only 4 feet thick with absolutely nothing below them. We discovered it below it was to late thankfully.
Ok. If you start to build these before Erich releases the flat pack, this is what you'll need to know.
Width = 12"
Depth = Can be what ever you want.
Height = This can also be what ever you want, except if you want Erich's baffle. I'm not sure he's landed on a final baffle height, but 36" would be about a minimum.
Ok, you'll need a midrange chamber for the mids. They can share the space. They are sealed, and should have 10L. If you need to build it with less, that would be fine, but bigger is better to keep internal reflection away. Provide ample damping material. I'd suggest a minimum of 10.5" wide (internal), 6" tall, and 10.5" deep or what ever depth you choose. That's 8L. For simplicity, the waveguide could share this space and allow more room.
The woofers can share a space or not. If they are in separate spaces, two ports each, kind of like I did:
25L (about 1cuft). Two ROUND ports. Each are 1.75" diameter and 2" long. The box should be amply stuff, even if it mean blocking the ports a little bit. The upper impedance peak needs to be knocked down for the XO to work nicely. So don't be afraid to stuff it up nicely.
If a shared woofer space with only two ports (not what I did):
50L or 2 cuft. Two ROUND ports. Each are 3" diameter and 2.5" long. Same box stuffing.
Brace it every 8" with dowels is my preference. You can improvise here though.
All your driver cut outs and things should be done when you have the parts in hand. However, for basic planning, the SEOS 10 and mids take up about 11" width and height. The woofers are about 10.5" overall. But make sure it all fits on the baffle properly before hacking it up. Flush mounting isn't a bad thing, but be consistent. Either flush them all, or surface them all. Flushing the woofers doesn't include the foam ring. That would put the woofer much to deep, unless the baffle was 1.5" thick.
Hope that helps people plan a little bit. In the mean time: ERICH, HURRY UP