Hey Bob
When I was at Axiom 4 years ago, as I was touring the plant I saw a speaker box with 9 holes in it. Looked like an M80 with only 3 x 3 driver configuration instead of the 2 x 3 in the M80's. I asked Ian what was this, he looked at me and said, that is R&D, our Kilowatt speaker. He also mentioned to me that it wouldn't necessarily sound better then the M80's, it would just play a whole lot louder.
The current Axiom HT speaker lineup hasn’t changed in almost 10 years (with some minor tweaks). I am sure there is new stuff on the horizon. What and when we will see it, who knows.
Maybe someone else here knows more about that and can enlighten us.