Rated Input 15 W Rated Impedance 8 Ω Sound Pressure Level >109 dB (1 W, 1 m at 500 Hz to 2.5 kHz peak level) Frequency Response Low : <333 High : >10.511 Sensitivity as microphone (0dBm = 1mW / 10 dyne) -20 dBm at 1 kHz Ambient Temperature -20 ℃ to +55 ℃