Amazon.com: Timpano 12" Sub D2 2500 Watts Max Power Dual 2 Ohm, 12 Inch Car Subwoofer 23.5 mm High Xmax, TPT-T2500-12 D2, 3 in Voice Coil, Competition Sub Woofer for Car Audio
Amazon.com: Skar Audio EVL-12 D2 12" 2500 Watt Max Power Dual 2 Ohm Car Subwoofer : Electronics
Amazon.com: American Bass XR-12D2 12" 2,400 Watts Max Power Dual 2 Ohm Car Subwoofer : Electronics
Amazon.com: Audiotek AT3500S 2 Channel Stereo Car Amplifier - 3500 Watts, 2 Ohm Stable, LED Indicator, Full Range, Bass Knob Included, Great for Speakers and Subwoofers : Electronics