BETA 87 A

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Cartridge Type Electret Condenser
Frequency Response 20 to 20,000 Hz
Polar Pattern Supercardioid
Output Impedance 150 Ω
Sensitivity −52.5 dBV/Pa (2 mV)
(at 1kHz, open circuit voltage) 1 Pascal=94 dB SPL
Maximum SPL (1 kHz at 1% THD, 1kΩ load) 140.5 dB
Signal-to-Noise Ratio 70.5 dB
(referenced at 94 dB SPL at 1 kHz) S/N ratio is difference between 94 dB SPL and equivalent SPL of self noise, A-weighted
Dynamic Range (at 1 kHz, 1 kΩ load) 117 dB
Clipping Level (1 kHz at 0.25% THD, 1kΩ load) −6 dBV (0.5 V)
Self Noise(typical, equivalent SPL, A-weighted) 23.5 dB typical
Polarity Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
Weight Net: 0.207 kg (0.475 lbs)
Connector Three-pin professional audio (XLR), male
Power Requirements 11 to 52 Vdc phantom (1.2 mA)