I've said it before that stuff is lighter. It has been for some time. At least the 160 and M5s are. I don't know about anything else. But it sounds just as good as the heavier versions.

Axiom is indeed working on something big and I have no idea how they're going to pull it off.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated