As far as the theory goes, u could go for a quadraphonic rumble. In the same breathe the output would be the same to each, but halfed (quartered for quad) to each one, so as long as the woofer isn`t a dumb one u could play with a knob to adjust it.
How good it would sound and feel irl, I don`t know. Particularly as the recordings of woofer based effects are normally banking on a X.1 setup, perhaps not X.2 or .4
Be kewl to try as a goof tho
I`d be interested if the outputs overlapped too much to cancel some things out.