Alphasonik AS12DF 12" Down Fire Shallow Mount Flat Enclosure | Alphasonik
SLIM SHADY 10" Shallow Subwoofer – Black Brick Audio
Sub 12 Slim | Focal America
Car Audio Slim Active Subwoofer – Pyle USA
Primus 1270B | Sealed slim enclosure with 12" (300mm) subwoofer
800w 10 Inch Enclosed Subwoofer System Car Super Slim Subwoofer Under Seat Sub Amplifier Power Hifi Audio Processor Music Player - Subwoofers - AliExpress
Amazon.com: Rockford Fosgate T1S1-12 Power 12" T1 Slim Single 1-Ohm Subwoofer : Electronics
Q POWER Single 10 in. Vented Shallow Sub Box and 10 in. 800-Watt Slim Car Audio Subwoofer SHALLOW110-VENTED + D10F - The Home Depot
Pioneer TS-A3000LS4 Shallow-mount 12" 4-ohm subwoofer at Crutchfield