W10109 10"Rubber Edge PP cone 33 OZ,2"AOSV,4 layer Frequency 39-2000HZ Impedance 4 ohm SPL:84dB Max.power 400W W12109 12"Rubber Edge PP cone 33 OZ,2"AOSV,4 layer Frequency 30-2000HZ Impedance 4 ohm SPL:85dB Max.power 400W