The SM94 is a unidirectional electret condenser microphone tailored to the instrument miking needs of professional musicians and sound engineers in both live performance and sound recording. Its smooth, flat frequency response is free of either a presence peak or a low-frequency rolloff, making it a perfect choice for all types of musical instruments.

The SM94 is equally at home in sound reinforcement systems or in sound studios and motion picture/ TV scoring stages. When used with the optional wind-screen, the SM94 can be used by vocalists and speech-makers who desire a wide, flat response with minimum coloration.

TypeCardioid Condenser (electret bias)Frequency Response40 to 16,000 Hz

Polar PatternCardioid (unidirectional)--uniform with frequency, symmetrical about axisOutput ImpedanceRated at 150 ohms; 200 ohms actualRecommended Minimum Load Impedance800 ohmsSensitivity (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)Output Clipping Level (1 kHz, 3% THD)

800 Ohm Load

-14 dBV (0.63 V) (phantom), 1% THD;

-23 dBV (0.71 V) (battery), 3% THD

Total Harmonic Distortion< 0.25% (130 dB SPL at 250 Hz into 800 ohm load)Maximum SPL800 ohm Load: 141 dB (phantom), 123 dB (battery)Hum Pickup-3 dB equivalent SPL in a 1 millioersted field (60 Hz)Output Noise(equivalent sound pressure levels; measured with true rms voltmeter)22 dB typical, A-weighted25 dB typical, weighted per DIN 45 505Dynamic Range119 dB (phantom); 101 dB (battery) (maximum SPL, 2000-ohm load, to A-weighted noise level)
Signal-to-Noise Ratio72 dB (IEC 651) at 94 dB SPLOvervoltage ProtectionMaximum External Voltage Applied to Pins 2 and 3 with respect to Pin 1: +52VdcReverse polarity protected to 75 VdcPolarityPositive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3Cartridge Capacitance24 pFPower - Phantom OperationSupply Voltage: 11 to 52 Vdc, (+) pins 2 and 3Current Drain: 1.0 TO 1.2 mA max. at 52 VdcPower - Battery OperationType: 1.5 V alkaline, AA size (NEDA 15A)Life: Up to 5,000 hours with fresh batteryEnvironmental 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)

ConnectorXLR professional audio 3-PinCaseSteel and brass construction with gray finish and stainless steel mesh grille