SK-SW8A | 8" 150 WATT COMPACT POWERED ACTIVE LOW PROFILE UNDER-SEAT CAR SUBWOOFER - Down4Sound Shop
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
Amazon.com: Kenwood KSC-SW11 Compact Powered Enclosed Subwoofer for CAR : Electronics
Amazon.com: BESTISAN Powered Subwoofer, 6.5" Active Home Audio Subwoofer in Compact Design,LFE & Stereo Line Inputs & Audio Output, Built-in Amplifier for Home Theater/Receiver/TV/Speakers, Black, SW65D : Everything Else
Polk Audio PSW10 10" Powered Subwoofer, 100W Peak Power, Compact Design, Easy Setup with Home Theater Systems Black PSW10 - Best Buy
FS Compact Powered Subwoofer – SKAAstore™
Harbinger S12 12" Compact Powered Subwoofer With DSP | Guitar Center
PowerBass STA-10 Compact powered under-seat 10" subwoofer enclosure at Crutchfield