Throat – 2 inch Nominal Impedance – 16 Ohm Sensitivity (1W/ 1M) – 112+-2dB Middle Range (AES)- 400 W High Range (AES) – 160 W Frequency Range – 300 – 20 KHZ Frequency Range (-10dB Max) – 700-18 KHZ Voice Coil Diameter – 4 inch Voice Coil Material – C