Nice job. Can't clearly tell from the picture, but is that an H-frame?
Thanks guys. It is an H Frame. The vertical center piece is 1" MDF and the frame extends about 8" on each side. I did not see the need for a separation piece for each driver. None of the plans I saw used it. It sounds pretty good the way it is. I think the bottom and top pieces are important in this case though. It may not be obvious from the picture but what you see is repeated on the other side of the vertical baffle.
The amp heat sinks barely get warm. The room is 28' x 22' x 11'. Remember that the driver area is pretty huge for each side. About the same area as two 15" subs per side so even with low frequency musical signals they do not have to move much at all even in a large room. I have them crossed over at about 80 Hz. Realistically not that much sustained music signal is down that low (I don't listen to techno).
My previous setup was a Bastanis 15" enclosed sub which is a very good musical sub. The new setup however goes lower with lower distortion. Even with some well recorded music that goes nice and low the sound never gets clouded. The subs give me really nice extended bass with seemingly no sweat at all. In fact that is how I would describe the sound overall. Very at ease with no strain. I have been surprised several times already by some low bass that I had not heard before. Very nice addition to the system.
I only have about 30 hours on them so it will take more time to reach full break in but the sound is killer already. Well worth the effort.
My main baffles are wideband units from Bastanis (2 x 12" per side) with a dipole tweeter. My other gear is as follows:
DAC: 16 x 1543 NOS DAC chips with passive I/V conversion (no Op-Amps)
Preamp: 26 tube unit made by me with the circuit design by Gary Pimm with some of my own mods.
Amps: Heavily modified LadyDay 300b amps using Electra-Print partial silver output trannies.
Cables: Digital: Ridge Street Audio. The rest are VH Audio design silver fabricated by me. Speaker cables: Silver ribbons of my own "design".