Alpine W10S4 Car Audio BassLine Series Sub Single 4 Ohm 500W Peak 10" Subwoofer with ASC DTB-2X10-CREW-UP Dual 10" Subwoofer Enclosure | 2X10DTB-CREW-19UP-ALP19-W10S4
Alpine S-W10D4 S-Series 10" subwoofer with dual 4-ohm voice coils - Breakers Stereo and Performance
Alpine BassLine Series 10 Inch 750 Watt 4-Ohm Car Audio Subwoofer | W10S4 - Walmart.com
Alpine 10-inch S-Series Subwoofer with Dual 2-Ohm Voice Coils -
Alpine Next Generation S-Series 10" Dual-Voice Coil 4-Ohm Subwoofer Black S2-W10D4 - Best Buy