15 Dual 4-ohm component subwoofer frequency response: 25-500 Hz,polypropylene cone with ribbed Santoprene rubber surround,100-500 watts RMS power range
10 Dual 4-ohm Component Subwoofer interlaced basalt and carbon reinforced IMPP cone with 3-layer urethane/fiber-woven surround,Air Suspension Control System eliminates traditional spider structure,100-800 watts RMS power range