RetroSound R-TW84: R-TW8 Series Flat Subwoofer 8" Round - JEGS
Targa TG-F10D 10" Street Series Flat DVC Subwoofer (2500W) – Max Motorsport
Focal P 20 FSE Flax Evo Series shallow-mount 8" 4-ohm component subwoofer at Crutchfield
Source 8inch car audio shallow subwoofer with flat PP dust cap and rms 100w power slim subwoofer speaker on m.alibaba.com
Amazon.com: Alphasonik Dynamis DCP8 8 inch 1000 Watts 4-Ohm Shallow Mount Flat Enclosed Sub woofer in Ported Vented Box for Tight Spaces in Cars and Trucks, Slim Thin Loaded Subwoofer Custom Port
Pioneer TS-A2000LD2 - 8-inch Shallow-Mount Subwoofer with 700 Watts Max. Power - Walmart.com
Sealed MDF Enclosure For Flat 8-inch Subwoofer - Final Sale – Retro Manufacturing
Lighting Trendz: GROUND ZERO HYDROGEN SERIES FLAT SUBWOOFERS
Neotera Audio 10" Ultra Flat Subwoofer
Amazon.com: Alphasonik Dynamis DCP8 8 inch 1000 Watts 4-Ohm Shallow Mount Flat Enclosed Sub woofer in Ported Vented Box for Tight Spaces in Cars and Trucks, Slim Thin Loaded Subwoofer Custom Port
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
AS8DF 8 inch 600 Watts 4-Ohm Down Fire Shallow Mount Flat Enclosed Sub woofer | eBay
Carwales Car Active Powered Woofer System Amplified Subwoofer 8 Inch Car Audio Sub Woofers Car Slim Flat Subwoofers Under Seat - Subwoofers - AliExpress