1.1" large diaphragm capsule Perfect circuit design &transformer output Low noise, wide dynamic range and strong sound pressure Element:Ф 34Pressure Gradient Transducer Polar Pattern Uni-directional Frequency Response:20Hz-20kHz Sensitivty:-32 2dB(OdB= 1V/Pa atlkHz) Outputimpedance:550$30%(at1kHz) LoadImpedance:≥ 1000S2 EquivalentNoiselevel:14dB A S/Ratio:80dB Max. SPL:130dB(at1kHz< 1%T.H.D) CurrentConsumption:3mA