Amazon.com: 1x Gravity 12 Inch 2000 Watt Car Audio Subwoofer w/ 2 Ohm DVC Power 12 in. Sub - Feature Dual Voice Coil, Thick Magnet, Design for Car, ATV, Van, High Performance Car Show : Electronics
Amazon.com: Savard Speakers HiQ Series 6.5" inch Dual 2 Ohm Subwoofer : Electronics
Amazon.com: Cadence 12 Inch Car Subwoofer, High Performance 1600 Watts Dual 2 Ohm 2.5 Inch Black Aluminum 4 Layer Voice Coil, Beast Series Car Audio Woofer BT12D2, Single : Electronics
Amazon.com: Skar Audio SDR-12 D2 12" 1200 Watt Max Power Dual 2 Ohm Car Subwoofer : Electronics
Amazon.com: Car Vehicle Subwoofer Audio Speaker - 15 Inch Competition Grade Pressed Paper Cone, 2 Ohm DVC, Advanced Air Flow, 7000W Power for Stereo Sound System - Gravity Warzone GW15D2 (2 Subwoofers) : Electronics