Amazon.com: Gravity Warzone 15 Inch 3500 Watt Car Audio Subwoofer w/ 4 Ohm DVC Power (Single) : Electronics
SDR-15 | 15" 1,200 Watt Max Power Car Subwoofer | Skar Audio
Dual 15 Subwoofer Box - Down4sound Shop
Amazon.com: H YANKA BSF-15-2 15 Inch Subwoofer - 2400W MAX Power 15 Inch Paper Cone Subwoofer Car Audio, Black Aluminum Basket, 2.5“ Dual Voice Coil 2 Ohm Impedance 15 Subwoofer for Cars : Electronics