Amazon.com: Massive Audio GTX64 – 6.5 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 6.5" Subwoofer 250 Watt RMS, 500w MAX Dual 4 Ohm, 1.5 Inch Voice Coil. Sold Individually : Electronics
JBL Synthesis HDI-4500 - Centre Speaker | AVStore
Amazon.com: Pyramid 12 Inch Car Subwoofer Speaker - 500 Watt High Powered Car Audio Sound Component Speaker System w/ 1.5 Inch Kapton Bobbin Voice Coil, 8 Ohm, 25 oz Magnet, Cloth Edge