These babies have about 17.5 feet of 2x4 internal bracing on the interior panels (hey, we just lost 0.7 cu. ft.). The finish looks like a vinyl cladding to me; if it is even paint, it looks VERY NICE, even the wife thinks they look good, and we went from mahogany vintage ev enclosures to these!

Those convienient t-nut inserts on top worked perfect for attaching my altec 511 horn mounts. "Sams Time Alignment Trolley" lets you adjust the fore/aft position of the horn to optimise it per altecs practice.
If the polyurethane on the baffles ever dries, 2404H1 tweeeters on top to fill in the upper octave a bit, not really needed on most material.

We have listened to one pair at least 8 hours daily since 27 Dec, I think these were the best upgrade (for the dollars) possible for a direct radiator LF system. They rumble low enough for me, and are tuneful and articulate to the point I can identify three SEPARATE notes in bass progressions where I heard only one before.

No way would I take the two woofs from one enclosure and make two speakers, much happier with the performance of a pair per side, floor space still about the same, just taller. Sam