The JBL Studio 660P is a high-performance powered subwoofer utilizing a front-firing 12-inch PolyPlas cone woofer with dual down-firing tuned ports. A 500Wrms amplifier provides the sonic impact and a full complement of inputs and controls make for easy system integration. The elegant cabinet design includes a magnitically attached grille and brings an element of sophistication to any room. The Studio 6 series delivers big dynamics, detailed sound, and powerful bass for true high-fidelity sound.