that would be your best bet. maybe they have a forum?? im not sure but it would be worth checkin into. also the manual should have some specs that would give you "optimal" enclosure specs.
One of the best features of the Axis is that it needs very little box volume to thrive. it needs no more than 1.5 to 2^3 ft. after displacement. When I was looking at running two of em(15's), I was looking at 4 ^3 ft. 80^2 of port. tuned to 32-33 hz for daily.