Originally Posted by dsskid
Is having a front firing, bottom ported subwoofer (energy S10.3) directly on a laminate covered cement slab floor ok?
It's fine, assuming it has rubber feet. But one of the advantages of down firing, be it a port or the driver, is the acoustic filtering of above bandwidth harmonics, which is greatly improved if there's carpet beneath the sub. For that matter carpet throughout the room will give a much better result than bare laminate.