Amazon.com: Kenwood KFC-W120SVC Road Series 12" Passive Car Subwoofer - 1000W, 36Hz-300Hz Frequency Range, 4-Ohm Impedance, Polypropylene Woofer Cone, Deep, Powerful Bass : Electronics
Kenwood P-XW1221SHP Single 12" High Power Subwoofer in a Vented Enclosure and includes a X502-1 1000W Max Power eXcelon Series Class D Mono Amplifier - Creative Audio
Kenwood KFC-W12PS 12" 1000 Watt Single 4 Ohm Car Audio Subwoofer/Sub KFCW12PS | Audio Savings
Kenwood Performance KFC-W2513PS Woofer, 300 W RMS, 1000 W PMPO - Walmart.com
KENWOOD KFC-W3041 12-Inch 2,000-Watt Max Subwoofer in the Mobile Audio department at Lowes.com