Amazon.com: 10" Car Audio Speaker Subwoofer - 1000 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System - Non Press Paper Cone, 90 dB, 4 Ohm, 50 oz Magnet, 2 Inch
Amazon.com: Massive Audio MMA124 MMA Series. 12 Inch, 1000 Watt, Dual 4 Ohm Car Subwoofer, 2.5 Inch Voice Coil. Sold Individually. : Electronics
Amazon.com: Massive Audio MMA104 MMA Series. 10 Inch, 1000 Watt, Dual 4 Ohm Car Subwoofer, 2.5 Inch Voice Coil. Sold Individually. : Electronics