Amazon.com: DS18 PSW12.4S 12" Shallow Mount Subwoofer 1200 Watts Max Power 600 Watts RMS Single Voice Coil 4 OHMS Water Resistant - Best Sub for Tight Spaces in Car & Trucks - 1 Speaker : Electronics
Pioneer TS-A3000LS4 Shallow-mount 12" 4-ohm subwoofer at Crutchfield
VS-12 | 12" 1000 Watt Max Power Car Ultra Shallow Mount Car Subwoofer | Skar Audio
Focal Sub 12 Slim 12" Shallow Mount Subwoofer, Single 4-ohm, 280w Rms - 560 W Max : Target
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