Source 12 inch active car audio powered subwoofer box system built in amplifier car speaker enclosure on m.alibaba.com
TS-WX130EA - Car Subwoofers | Pioneer
Amazon.com: Yaeccc 10 Inch 600W Car Under-Seat Sub Woofer Active Powered Amplifier Bass Enclosed : Electronics
Amazon.com: Pyle 8-Inch Low-Profile Amplified Subwoofer System - 600 Watt Compact Enclosed Active Underseat Car Audio Subwoofer with Built in Amp, Powered Car Subwoofer w/Low & High Level Inputs PLBX8A : Electronics
Best car powered subwoofers for 2023
BassLink SM2 | ["Add high-performance bass with a low-profile woofer enclosure", "Powered, 8\" (200mm) compact car audio under seat woofer system"]
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
Discontinued Obsolete SKU | MTX Audio - Serious About Sound®
VPAS10V2 - 10" Vega Powered Active Subwoofer - Cerwin Vega