AUDIOPIPE High Power 1800-Watt 15 in. 4 Ohm DVC Car Audio Subwoofer, Black TXX-BDC2-15 - The Home Depot
BOSS Audio CXX8 Chaos Exxtreme 600 Watt Subwoofer - Walmart.com
Amazon.com: JBL Club WS1000 10" Shallow Mount subwoofer w/SSI (Selectable Smart Impedance) Switch from 2 to 4 ohm Bundled with Alphasonik Earbuds : Electronics
DS18 PRO-BX18N.2D 18" Neodymium Woofer 5000 Watts 6" 2-Ohm DVC audio car home system Subwoofers
2) JBL JRX215 15" 1000 Watt DJ PA Speakers+Power Amplifier+Stands+Cables - Rockville Audio
Amazon.com: JBL BassPro SL2 Active Underseat Car Subwoofer with Built in Amplifier - Under Seat 8'' Subwoofer Car with 125 Watt Power Amplifier : Electronics