Amazon.com: Massive Audio SUMMOXL154-15 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 15" Subwoofer 1500 Watt RMS, 3000w MAX Dual 4 Ohm, 3 Inch Voice Coil. Sold Individually : Electronics
Sundown Audio NSv6 18 inch Dual 1 ohm Subwoofer Nightshade(3000 watts) – Droppin HZ Car Audio
Pioneer TS-W3002D4 Champion Series 12" 3500W PRO DVC Subwoofer 4+4 Ohm
Amazon.com: Pioneer TSW312D4 Champion Series 12" 1500 Watt Dual 4 Ohm Voice Coil DVC Car Subwoofer : Electronics