DS-1010 10"Woofer Foam -edge Paper Cone 2 X50 oz Magnet 2.5"(KSV) Voice Coil Sensitivty: 87 dB Impedance:4 Ohm 300 Watts RMS Power DS-1012 12"Woofer Foam -edge Paper Cone 2 X65 oz Magnet 3"(KSV) Voice Coil Sensitivty: 87 dB Impedance:4 Ohm 450 Watts RMS Power We have many models of car speaker component kits;profession speaker component kits; Loudspeaker Components and GPS , with high end good quality and best prices . If you are interested in our products ,please feel free to contact us . OEM/ODM service :available