BT 201 stereo pair

BT201|1 Transducer type electrostatic Operating principal pressure gradient Diaphragms active diameter 25 mm Frequency range 20 Hz to 20 kHz Polar pattern cardioid Output impedance 50 ohms Rated load impedance 1000 ohms Suggested load impedance > 500 ohms Sensitivity at 1000 Hz into 1000 ohms load 22 mV/Pa S/N Ratio CCIR 468-3 weighted 76 dB S/N Ratio DIN/IEC 651 A-weighted 87 db-A Equivalent noise level DIN/IEC A-weighted 6 dB-A Maximum SPL for 0.5% THD at 1000 ohm load 134 dB Dynamic range of the microphone preamplifier 128 db Phantom powering voltage on pins 2 & 3 of XLR +48 V (+/-4 V) Current consumption < 2 mA Output connector 3-pin XLR male, gold plated contacts Signal polarity positive toward pressure on a diaphragm produces positive polarity voltage on XLR pin #2 relatively to pin #3