Boston Acoustics VOYASUB12 Voyager 12-Inch Outdoor Subwoofer Moisture-sealed basket and UV resistant polyethylene cabinet Power-coated aluminum grille 5-way gold-plated binding posts Mounts easily and inconspicuously between underside joists of a deck, or can be buried vertically in a garden Designed to be used with the SA-1 subwoofer power amplifier