Model No KWH-G90D Voice Coil Impedance 6 Ohm( at 1KHz) Voice Coil Dimension D25.5 mm( Dia.) Magnet Size D60* 32* 7 mm( Dia.* dia.* H) Power Rating 15 W Min.Sound Pressure Level 102dB( at 1 meter / 1W) Resonant Frequency 2KHz± 10% Frequency Response 500-8500Hz Operating Temperature -20~ + 85 Store Temperature -20~ + 90 Weight 355± 10g