\rHi David:
This design is available in a Subwoofer (FORZA8) as well. Both are meant to be buried 3 to 4 inches or at least within an inch of the output slot. Burying tends to solidify the cabinet. There is no way for you to secure the enclosure to the deck without creating something yourself. Securing the FORZA8 Subwoofer would be critical, but I think you secure both in some form or fashion.\r