Amazon.com: MB Quart DS1-204 Discus Shallow Mount Subwoofer (Black) – 8 Inch Subwoofer, 400 Watt, Car Audio, 2 Inch Voice Coils, UV Rubber Surround, Best in Sealed Enclosures : Electronics
Amazon.com: BOSS Audio Systems CXX8 8 Inch Car Subwoofer - 600 Watts Maximum Power, Single 4 Ohm Voice Coil, Easy Mounting, Sold Individually : Electronics
Polk Audio db840DVC db Series 8" subwoofer with dual 4-ohm voice coils at Crutchfield
DS18 ZXi8.4D High Excursion 8" Car Audio Subwoofer 1200W Watts DVC 4-Ohms Quad Stacked Magnets
DB1042 DVC 10" Subwoofer | Car & Marine | Polk Audio
BOSS Audio Systems CUBE8 8 Inch Car Audio Subwoofer and Amplifier Package – Powered, Built-in Amplifier, Passive Radiator, Remote Subwoofer Control, For Truck, Boxes and Enclosures - Walmart.com
BOSS Audio Systems BE8D Elite Series 8 Inch Car Audio Subwoofer - 600 Watts Max, Dual 4 Ohm Voice Coil, For Truck Boxes and Enclosures, Hook Up To Amplifier
Sony XS-GS80L GS Series 8" 4-ohm subwoofer at Crutchfield