Amazon.com: MTX TN8MS Terminator 8 Inch Micro Compact Amplified Subwoofer Enclosure for Small Vehicles with Class A/B Amplifier, Variable Bass Boost, External Bass Control, and Smart Engage Auto Turn On Circuitry :
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
8" Active Amplified built in Amp Under Seat Sub Subwoofer Enclosed box ON SALE | eBay
RetroSound® SUB8100 8-inch Class D Amplified Subwoofer – Retro Manufacturing
Yamaha DXS18XLF 1600W 18 inch Powered Subwoofer | Sweetwater
KICKER Hideaway 8" Subwoofer with Enclosure and Integrated 150W Amplifier Black 11HS8 - Best Buy
Behringer B1800XP 3000W 18 inch Powered Subwoofer | Sweetwater
BOSS Audio Systems BAB8 8 Inch Powered Under Seat Car Audio Subwoofer - 800 Watts Max, Low Profile, Remote Subwoofer Control, For Truck, Boxes and Enclosures - Walmart.com
BOSS Audio Systems BASS8 8 Inch Under Seat Powered Car Subwoofer – 800 High Output, Low Profile, Built In Amplifier, For Truck, Boxes and Enclosures, Remote Subwoofer Control