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 12"Woofer Foam -edge Paper Cone 2 X65 oz Magnet 3"(KSV) Voice Coil Sensitivty: 87 dB Impedance:4 Ohm 450 Watts RMS Power