MS-10SD4 SLIM | An advanced-design, shallow-mount, 4-ohm dual voice-coil subwoofer delivering phenomenal bass in a small space
Amazon.com: Slim Subwoofer Box System - 600 Watts, Perfect for Mount Car Truck Audio Powered Subwoofer Enclosure, High Powered 12-inch Woofers with a Non-Pressed Paper Cone - PSBS12 : Electronics
Harman Jbl Basspro Sl Car Subwoofer Amplifier Built-in Power High And Lower Level Hifi Auto Audio Slim 125w 8" 200mm - Subwoofers - AliExpress
JBL 102AM Stage Series 10" 4-ohm component subwoofer at Crutchfield
JBL MS Slim Series Shallow Mount Subwoofer - YouTube