As to the question about my Celestion TMM build. I've briefly discussed this in my build thread, but here's some more detail.
The 1099 is really quite good. It's the best speaker I've ever built and possibly the best I've heard. I said that earlier in this thread, so nothing new. And of course that bold statement comes with caveats (requires a quality subwoofer system). Some might say, "but it only uses $80 woofers, the Celestions are $130???". Ya but it doesn't work that way. What makes a speaker good is the overall execution, concept, goals, etc. As an example. The noesis 212 generated buzz in the DIY community, not because it's just another speaker that has high output, but because the concept is truly great and works really well. There's nothing revolutionary about the 1099, but there are some features about it that are great, that raise it into the category of "this might be the best thing I've ever heard". First is the dual woofers in the WTMW which cancel ceiling and floor reflections. Speakers like the statements also share this feature. Next is the side by side mids. Very difficult to work with, but you get the clarity of a 5" mids, with the output of two of them. Last is that its a 3 way SEOS. The only one I'm aware of. Being 3 way relieves the midrange from IMD and increases power handling (decreases compression). The result was hearing right through and into the recording like the musicians were right in front of me.
Ok, the TMM (possibly MTM). Well, it has two 12" woofers which is an incredible amount of mid bass capability. I don't even have both woofers going yet and it's really got punch. Two is blow knock my socks off. But if my audio memory serves me well (it never does though, keep that in mind), the 1099 was no slouch. That thing just went up and up and up. It too has mid bass output more than same people need (I know that's not us). Just ask fatshaft. He's now running them full range. But indeed, the dual 12s should over take the 1099 in mid bass, by a noticeable and significant margin.
The TMM will also carry directivity a couple hundred hz lower than the 1099. The 1099 is narrow, and directivity is sacrificed as a result. But if I may butt in my personal opinion here, I personally don't find directivity to be a significant criteria below about 700hz. I can explain that if anyone cares. Never-the-less, it is worth noting as all else equal, greater directivity is an advantage.
And that's it. The TMM offers nothing else over the 1099.
Celing/floor reflection canceling
Dedicated midrange with two small mids.
Worked out really well IMO.
Mid bass king
Sorry I can't tell you which one I ultimately prefer, but the TMM isn't done. I will say though, I'm NOT betting on the TMM. I know I know. Why the heck am I building the TMM?? Cause I can, cause I want to do some PA work, and cause I wanted to try the Celestion. Now that I think about it... Those are dumb reasons.