I'd be very interested in this design as well. As others have said, I am curious what the real world advantage would be to this design? Is it similar output in a smaller package? Sonos has adopted this design in their subwoofer , but that is a niche product for Sonos owners. Plus they have oval 'racetrack' drivers to get the form factor they wanted.

I am excited to see what Axiom will come up with for new sub designs! Please keep us posted Andrew.
On-Wall M5HP LCR, QS8 & EP500 in 7.1