frame diameter: 390 mm (15 in) Nominal impedance: 8Ω VOICE COIL DC resistance: 5.6 Ω/200Hz Nominal power handling: 800W Continuous power handling: 1000 W Sensitivity (SPL1W/1m): 103 +/-2 dB Frequency range: F0~2.5 kHz Voice coil diameter: 75mm (3 in) Winding material: CCAW Diaphragm material: PAPER Magnet material: Neodymium