MB Quart Formula FW1-254 bundle - Two 10 Inch Dual Voice Coil 400 Watt Car Audio Subwoofers - Creative Audio
RWE-304 - MB Quart 12" 1000 Watt Reference Series Subwoofer
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
Amazon.com: MB Quart DS1-254 Discus Shallow Mount Subwoofer (Black) – 10 Inch Subwoofer, 400 Watts, Car Audio, 2 Inch Voice Coils, UV Rubber Surround, Best in Sealed Enclosures : Electronics