When you know how good your music can sound with a subwoofer, listening without one just isn't the same. Get the beat back with the Altec Lansing BB2001 Subwoofer. It adds seriour, bone-rumbling bass to your your speaker system. It sports a silver grille, blue power indicator light, and clean lines that look good in any setting. A convenient power switch, volume control, and simple installation make this subwoofer a necessary addition to your system. It plugs into the SUB OUT port on your portable speakers. Easy and effective, the BB2001 gives you the bass you've been craving.