Amazon.com: Alphasonik AS8DF 8 inch 600 Watts 4-Ohm Down Fire Shallow Mount Flat Enclosed Sub woofer Slim Thin Loaded Subwoofer Air Tight Sealed Bass Enclosure : Electronics
SLW8A 8" Shallow Mount Subwoofer - Elektra Mobile Audio
Pioneer TS-A2000LD2 - 8-inch Shallow-Mount Subwoofer with 700 Watts Max. Power - Walmart.com