[Raine]

Infinite baffle systems generally sound quite sloppy, albeit loud. The problem lies with the fact that in a no-enclosure situation, the speaker cone has nothing to reflex off (in a sealed box, for example, it has the air, slightly compressed by the pressure generated at low frequencies), thereby nothing to force the cone back against the signal. Certain IB subs have "springs" to return the cone to position, but such springs can often be TOO tight and result in short, overly sharp bass hits. I still think a sealed fiberglass enclosure is the best option. If space is your concern, either try making a sidewall box, a false floor, or use an Infinity Basslink