A drop ceiling would be the only thing separating the front and rear waves, can I install an IB?
No, a drop ceiling doesn’t provide adequate isolation between the front and rear waves. FYI, a drop ceiling functions as a bass-trap. People have built IB subs in the attic above a drop ceiling, then extended the outlet of the manifold below the ceiling tiles. In this instance it’s a good idea to place 6″ or more of fiberglass batts on top of the tiles so they’re less likely to bounce from the pressure of the bass output.
