Kicker 46HS10 Hideaway Series 10" compact powered subwoofer with 180-watt amp at Crutchfield
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,Black : Electronics
Polk Audio PSW111 8" Compact Powered Subwoofer 300 Watt
Amazon.com: DR DOUBLE ROCK CB08 Under-Seat Subwoofer Car Audio 600 Watts 8 inch Slim Powered Subwoofer with Built in Amp Active Compact Subwoofer with Amplified+Bass Volume Control Knob : Electronics
PSI AUDIO Sub A125-M Compact 10" Powered Subwoofer (White)
QSC KS112 12" Compact Powered Subwoofer | Guitar Center
Kicker Hideaway 8" Compact Powered Subwoofer | P.C. Richard & Son
Kenwood KSC-SW11 150-Watt Compact Powered Subwoofer with Remote - Walmart.com
Alpine PWE-S8-WRA 8-inch Compact Powered Subwoofer System for 11-18 Jeep Wrangler Unlimited JK | Quadratec
SK-SW8A | 8" 150 WATT COMPACT POWERED ACTIVE LOW PROFILE UNDER-SEAT CAR SUBWOOFER - Down4Sound Shop