TS-A301D4 - 12" - 1600 W Max Power, Dual 4 Ohm Voice Coil, Champion Series- Component Subwoofer | Pioneer Electronics USA
TS-A301S4 - 12" - 1600 W Max Power, Single 4 Ohm Voice Coil, Champion Series- Component Subwoofer | Pioneer Electronics USA
Pioneer TS-A301S4 Champion Series12 inch 1,600-Watt Max Single-Voice-Coil 4-Ohm Component Subwoofer - Walmart.com
Amazon.com: Alphasonik NSW412 Neuron 400 Series 12” 1500 Watts Max / 500 Watts RMS Dual 4 Ohm Car Subwoofer w/ High Grade Magnet Non Pressed Paper Carbon Stitched Cone Cooling Rings System