BOSS Audio Systems P126DVC Phantom Series 12 Inch Car Audio Subwoofer – 2300 Watts Max, Dual 4 Ohm Voice Coil, Sold Individually, For Truck Boxes and Enclosures, Hook Up To Amplifier - Walmart.com
Amazon.com: NVX VCW124v3 12" 2400 Watt Peak (1200W RMS) Dual 4-Ohm VC-Series Car Subwoofer (VCW124 Version 3) : Electronics
Audi A4 B8 Woofer Replacement 2009-2016 - YouTube
Amazon.com: Massive Audio SUMMOXL104-10 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 10" Subwoofer 1500 Watt RMS, 3000w MAX Dual 4 Ohm, 3 Inch Voice Coil. Sold Individually : Electronics
Amazon.com: Boss Audio Systems P126DVC Phantom 12-Inch 2300 Watts 4 Ohm Dual Copper Voice Coal Car Audio Stereo Subwoofer Speaker with Poly Injection Cone : Electronics