Anyone with a pair of these big ol' boxes around would do well to try inverting them like this as a LF platform for whatever MF/HF they want to use on top.

Using 2235H, it's basically 4430 bass, but with the driver up off the floor and close to the horn. No changes to the box are required other than to block off the original MF/HF openings.

Up on these dollies, the top is 35.5" from the floor, 3" shorter than L200, and 1" shorter than 4507 on the same wheels....