I was also thinking about taking 2 Kicker LF7's and putting them in a 6 cubic squared sealed box with a woofer on each side of the enclosure for my HT set up in the basement. I suspect that babt wouild hit at about 17 htz.
Mike that idea is ridiculous. Maybe instead of 2 L7s you could use one and maybe add a couple of PRs to it. Hit me up for some help with the design! By the way, what do you plan on using for amplification?