Amazon.com: Skar Audio IX-10 D4 10" 400 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
10 Inch 400-Watt Rms Dual Car Audio Subwoofer
Amazon.com: MB Quart DS1-204 Discus Shallow Mount Subwoofer (Black) – 8 Inch Subwoofer, 400 Watt, Car Audio, 2 Inch Voice Coils, UV Rubber Surround, Best in Sealed Enclosures : Electronics