Kenwood P-XW1221DHP Dual 12" High Power Excelon Subwoofers in a Vented Enclosure and includes a KAC-9106D 2000 Max Power Class D Mono Amplifier - Creative Audio
Amazon.com: Kenwood KFC-W3041 Car Subwoofer - 2000 Watts Maximum Power, 12 Inch, Single 4 Ohm Voice Coil, Sold Individually : Electronics