Amazon.com: Massive Audio KILOX122-12 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 12" Subwoofer 1000 Watt RMS, 2000w MAX Dual 4 Ohm, 3 Inch Voice Coil. Sold Individually : Electronics
Gravity 10 Inch 1000 Watt Car Audio Subwoofer w/ 4 Ohm DVC Power (Single) : Electronics
Amazon.com: Sound Storm Laboratories US10 Amplified Car Subwoofer - 1000 Watts Max Power, Low Profile, 10 Inch Subwoofer, Remote Subwoofer Control, Great for Vehicles That Need Bass But Have Limited Space : Everything Else
Rockville W12K9D2 12" 4000w Peak Car Audio Subwoofer Dual 2-Ohm Sub 1000w RMS CEA Rated : Electronics
PRV AUDIO 10 Inch Midrange Speaker 10MR1000X, 1000 Watts Program Power, 3 in Voice Coil, 8 Ohm, 500 Watts RMS Pro Audio Loudspeaker (Single) : Electronics