Amazon.com: PyleUsa 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 :
Professional PA System with 15-inch Speakers, 18-inch Subwoofers, Amplifier – Sound Town Inc
Kicker Comp R 12 Inch Dual Subwoofer in Vented Enclosure Package with 46CXA8001 Amplifier and wire kit - Creative Audio
Kicker 48TRTP82 Comp RT 8 Inch Sub and Amp Combo with Box: TRTP82-SK
Amazon.com: BOSS Audio Systems CUBE10 Car Subwoofer and Amp Package – Built-in Amplifier, 10 Inch Subwoofer with Passive Radiator, Remote Subwoofer Control : Electronics