Amazon.com: KENWOOD X502-1 eXcelon 500-Watt @ 2 Ohms Class D Subwoofer Amplifier | Plus KENWOOD eXcelon P-XW1221DHP 2-ohm Ported Enclosure with Two 12" Subwoofers : 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 Performance KFC-W2513PS Woofer, 300 W RMS, 1000 W PMPO - Walmart.com
Best Buy: 1000W Class D Digital Mono Amplifier with Variable Low-Pass Crossover, 12" Subwoofer, Subwoofer Enclosure and Amp Kit