GX 10" High Performance Dual 4-Ohm Subwoofer – Stinger Electronics
Power Acoustik MOFO-152X 15" 3000 Watt / 1700w RMS Car Subwoofer Sub MOFO152X - Walmart.com
Amazon.com: American Bass HD Series Subwoofer Dual 4 Ohm Voice Coil, 800W AB-HD-8-D4 : Electronics
STLF-15110ZA | 15" 500W Cast Aluminum Frame Woofer (Low Frequency Driver) – Sound Town
BOSS Audio Systems BE12D Elite Series 12 Inch Car Audio Subwoofer - 1000 Watts Max, Dual 4 Ohm Voice Coil, For Truck Boxes and Enclosures, Hook Up To Amplifier