Amazon.com: Alphasonik AS12DF 12" 1500 Watts 4-Ohm Down Fire Shallow Mount Flat Enclosed Sub woofer for Tight Spaces in Cars and Trucks, Slim Thin Loaded Subwoofer Air Tight Sealed Bass Enclosure :
2 x DS18 Hooligan X 15" 12000 W 4"DVC 2 Ohm High Excursion Competition Subwoofer - Walmart.com
Amazon.com: ALPHASONIK AS10DF 10 inch 1200 Watts 4-Ohm Down Fire Shallow Mount Flat Enclosed Sub woofer for Tight Spaces in Cars and Trucks, Slim Thin Loaded Subwoofer Air Tight Sealed Bass Enclosure :
BOA121 12 Inch Subwoofer | 6,000 Watts RMS Dual 1 Ohm Mega Subwoofer – Massive Audio
Massive Audio Celebrates their 20th Anniversary with their new “BOA SERIES” 12,000 Watt Mega Subwoofers - 12voltmag.com
15 inch 12000 Watts Car Subwoofer | EDGE EDP152SPL-E6 – Midbass Distribution Ltd