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
MB Quart Formula FW1-254 bundle - Four 10 Inch Dual Voice Coil 400 Watt Car Audio Subwoofers - Creative Audio