Amazon.com: Kenwood KFC-W3041 Car Subwoofer - 2000 Watts Maximum Power, 12 Inch, Single 4 Ohm Voice Coil, Sold Individually : Electronics
Kenwood P-XW1221D Dual 12" Excelon Subwoofers in a Vented Enclosure and includes a XR601-1 Reference Series 1200 W Max Power Mono Amplifier - Creative Audio
Kenwood KFC W3013PS Performance Series 12" Subwoofers 4 ohms 400W RMS Power | eBay
Kenwood KFC-W3011 Subwoofer for Car 12" 4-ohm 1200W 90 dB Sensitivity — Online Camera Systems
Kenwood KFC-W3011 at Onlinecarstereo.com
KFC-W3012DVC - Kenwood 12" 1200W DVC 4-ohm Comp Car Subwoofer
Kenwood 12 inch Subwoofer - electronics - by owner - sale - craigslist