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
Bose MB210 compact subwoofer, black | MUSIC STORE professional
JBL 18-in Passive Compact Subwoofer - Westlake Pro
REL T/5X Compact Subwoofer | ListenUp
ESX DBX-200 Dbx Kompakt-Subwoofer For Fiat Ducato Citroën Jumper Peugeot Boxer | eBay
V8 Compact Subwoofer - M&K Sound® | Official Site
12 Killer Compact Subwoofers - Electronic House
Alpine PWE-S8 Compact 120-watt powered 8" subwoofer at Crutchfield
L-Acoustics SB15M High Power Compact Subwoofer 1x15-Inch | PSSL ProSound and Stage Lighting
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
Sound Ordnance™ B-8PTD 125-watt compact powered subwoofer at Crutchfield
Sub 12 slim - Subwoofer | Focal
Amazon.com: BESTISAN Powered 6.5'' Home Audio Subwoofer, Deep Bass Response Subwoofers in Compact Design, Easy Setup with Home Theater Systems, TV, Speakers, RCA, Black : Electronics