Amazon.com: Massive Audio GTX122 – 12 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 12" Subwoofer 700 Watt RMS, 1400w MAX Dual 2 Ohm, 2.5 Inch Voice Coil. Sold Individually : Electronics
Amazon.com: Massive Audio KILOX104-10 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 10" Subwoofer 1000 Watt RMS, 2000w MAX Dual 4 Ohm, 3 Inch Voice Coil. Sold Individually : Electronics
Best Buy: Massive Audio Massive GTX Series 12-Inch 1,000-Watt-RMS Dual 4-Ohm Subwoofer Black Black GTX 124R