Well, depending on how low you want it to go at 'x' peak SPL, just mounting it on a sturdy 2x4 ~24" square frame and placed on, and perpendicular to, the floor (reinforced somehow if a 'floating' one like mine) will load down to ~120-130 Hz and it high Qt will fill in somewhat below it, so depending on where in the room it is relative to its room modes, may 'pound sand' all the way to Fs and beyond.
Use fore, aft legs with some triangulation bracing for laying trash bags of sand/whatever draped over the legs to damp/'plant' it to the floor.
A cheap, easy way to experiment if nothing else.
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