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
Pioneer TS-WX1210A - Sealed 12" 1,300-Watt Active Subwoofer with Built-in Amp - Walmart.com
Amazon.com: Acoustic Audio WS1005 Passive Subwoofer Amp 200 Watt Amplifier for Home Theater : Electronics
Crunch 2 Channel 1000 Watt Amp A/b Class Car Audio Stereo Amplifier & Mtx 12 Inch 1200 Watt Car Audio Dual Loaded Subwoofer Box Enclosure : Target