The Monstros are 4 feet tall - one wing is 10 inches wide and the other wing is 18 inches wide. The center baffle is 10 inches wide. With a lighter driver I would have gone with a 9 inch center baffle. But the Tang Band with its neodymium magnet is very heavy and I felt it needed the extra support. The center of the driver is 25 inches from the floor. The nice thing about the wings is that you can angle them anyway to suit your preference. Mine sound great with both wings at 90 degrees. Technically they should offer more bass as you spread the wings but the TB's give bass regardless. From everything I've read you can hardly make an OB too large.

You can make the Monstros from a single sheet of $35 plywood. HD or your lumberyard will make all the cuts for free and you can carry them home in a subcompact. As I've said in other posts, OB's are too simple and not profitable to make like regular enclosures and that is why I suspect they will never be commercially produced.

I drive the Monstros with a Bada Tube Hybrid ( 95 wpc ) or a modded MiniWatt SET ( 2.5 wpc ) with some gain from a Aric Audio Tube Preamp. SET's are stunningly with efficient FR drivers but the Bada gives the TB's some interesting slam.

The TB's in OB produce music as close to live as anything I've heard. It's what I've been looking for since I started this hobby many years ago.