I'm anxious as well to see the improvements of this 350, based on Alan's post. When I first started with Axiom I had a 350v1 which did a decent job upstairs, and even in my huge rec room/ht area. Then I upgraded to a 500, which was unbelievable, then the 600 which was even more unbelievable.
I'm guessing with the step up to the 500 enclosure, bigger amp, goosed up special circuit, that it will be much improved sub. I'm hoping 2 of them will help me even out the FR across all seats.