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Type : Cardioid condenser (electret bias)
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Polar Pattern : Cardioid (unidirectional)--uniform with
frequency, symmetrical about axis
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Output Impedance : Rated at 150 ohms; 200 ohms
actual
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Recommended Minimum Load Impedance : 800 ohms
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Sensitivity (at 1,000 Hz)
Open Circuit Voltage: -49 dBV/Pa (3.5 mV) (phantom)
-50 dBV/Pa (3.2 mV) (battery) (1 Pa = 94dB SPL)
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Output Clipping Level (1 kHz, 3% THD)
800-Ω Load
-14 dBV (0.63 V) (phantom), 1% THD;
-23 dBV (0.71 V) (battery), 3% THD
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Total Harmonic Distortion : < 0.25% (130 dB SPL at 250
Hz into 800 ohm load)
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Maximum SPL : 800 ohm Load: 141 dB (phantom), 123 dB
(battery)
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Hum
Pickup : -3 dB equivalent SPL in a 1 millioersted field (60
Hz)
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Output Noise (equivalent sound pressure levels; measured
with true rms voltmeter)
22 dB typical, A-weighted
25 dB typical, weighted per DIN 45 505
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Dynamic Range : 119 dB (phantom); 101 dB (battery) (maximum
SPL, 2000-ohm load, to A-weighted noise level)
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Signal-to-Noise Ratio : 72 dB (IEC 651) at 94 dB
SPL
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Overvoltage Protection
Maximum External Voltage Applied to Pins 2 and 3 with respect to
Pin 1: +52Vdc
Reverse polarity protected to 75 Vdc
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Polarity : Positive pressure on diaphragm produces positive
voltage on pin 2 relative to pin 3
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Cartridge Capacitance : 24 pF
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Power
Phantom Operation
Supply Voltage: 11 to 52 Vdc, (+) pins 2 and 3
Current Drain: 1.0 TO 1.2 mA max. at 52 Vdc
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Battery Operation
Type: 1.5 V alkaline, AA size (NEDA 15A)
Life: Up to 5,000 hours with fresh battery
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Environmental Conditions
Temperature:
Storage: -29 degrees to 74 degrees C (-20 degrees to 165 degrees
F)
Operating: -6.7 degrees to 49 degrees C (20 degrees to 120 degrees
F)
Humidity:
Storage: 0-95% relative humidity at room temperature (72 degrees to
80 degrees F, 22 degrees to 27 degrees C)
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Connector : XLR professional audio 3-Pin
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Case : Steel and brass construction with gray finish and
stainless steel mesh grille
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Dimensions : See User Guide
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Weight
Net: 250 grams (8.8 oz) less battery
Packaged: SM94-LC: 949.7 grams (2 lb 1 1/2 oz)
