RetroSound® SUB8100 8-inch Class D Amplified Subwoofer – Retro Manufacturing
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 :
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
BAS8 - 8" 400 Watts RMS Class D Powered Subwoofer in Ported Enclosure,
XS-AW8 | 8" (20cm) Compact Powered Subwoofer | XS-AW8 | Sony Asia Pacific
MTX RT8PT 420W 8" Active Amplified Sub Subwoofer Enclosure Box Car Bass Tube | eBay
Everything You Need to Know About Car Powered Subwoofers + 5 Top Picks
10-Inch Low-Profile Amplified Subwoofer System - 900 Watt Compact Enclosed Active Underseat Car Audio Subwoofer with Built in Amp, Powered Car Subwoofer w/Low & High Level Inputs - PPLBX10A : Amazon.ca: Electronics