Element Fixed-charge back plate, permanently polarized condenser Polar Pattern Cardioid Frequency Response 80-20,000 Hz Open Circuit Sensitivity Phantom: -46 dB (5.0 mV) re 1V at 1 Pa Battery: -48 dB (3.9 mV) re 1V at 1 Pa Maximum Input Sound Level Phantom: 137 dB SPL, 1 kHz at 1% T.H.D. Battery: 125 dB SPL, 1 kHz at 1% T.H.D.
