Powerbass S-1004 10-Inch Single 4 Ohm Subwoofer 550 Watts MaxBrand New Powerbass S 1004 10 Inch Single 4 Ohm Subwoofer 550 Watts Max Key Features: 4 Layer Black Paper Wool Cone provides for very natural smooth bass reproduction Large Roll Foam Surrounds allow the free movement of the cone which equals loud bass Oversized Motor Structure high intensity ferrite magnet for increased power handling Dual and Single 4 ohm Voice Coils made with pure PIW wire looped through the spider 2" BASV Voice Coil Formers for