The Rockville W65K9D4 6.5" Dual 4-Ohm Car Audio Subwoofer combines compact size with powerful performance. Delivering 1000 watts peak, 500 watts program, and 250 watts RMS (CEA-rated), it produces deep, distortion-free bass that enhances any music style. Built with 2" 4-layer ASV voice coils wound with USA-made OFC wire, this sub is thermally stable up to 180 degree C for consistent performance.A double-stacked 66 oz magnet with a high BL motor gap provides strong bass output, while the black non-pressed paper cone, thick foam surround, and black stitching ensure durability and clarity. The cast aluminum basket with black sanded finish keeps weight low and efficiency high, while the vented T-yoke improves heat dissipation during extended use.With 82.1dB sensitivity, a frequency response of 52Hz-800Hz, and a 4.17" mounting depth, this subwoofer fits easily into sealed or ported enclosures. The polypropylene dustcap, poly cotton spider, and chrome-plated terminals add reliability and style. Designed for car audio enthusiasts, the W65K9D4 is perfect for those seeking powerful bass in a compact 6.5" format.