18" Custom Hand Built Subwoofer 5000rms (Team 18) - EM Audio Subwoofers
Monitor Audio Silver W-12 (High Gloss Black) Powered subwoofer with auto room correction at Crutchfield
Supernova MKIV-10 - Earthquake Sound Shop
BOSS Audio Systems BAB10 10 Inch Powered Under Seat Car Audio Subwoofer - 1200 Watts Max, Low Profile, Remote Subwoofer Control, For Truck, Boxes and Enclosures - Walmart.com
5 Inch Car Audio Speaker I Key Buy 12v 220v Max 100watts Hifi Bluetooth Active Motor Auto Van Boom Box Loudspeakers Subwoofer - Subwoofers - AliExpress
BOSS Audio Systems D12F Phantom Series 12 Inch Car Subwoofer - 1000 Watts Max, Single 4 Ohm Voice Coil, Sold Individually, Hook Up To Amp