SM94 Instrument Microphone 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. A sensitive mic with a wide, flat response ideal for live amplified and acoustic instruments. Extremely well-suited for reproduction of stringed instruments, woodwinds and cymbals AA battery or phantom power Internal shock mount Wide dynamic range Smooth, flat frequency response Uniform Cardioid condenser Frequency response: 40 to 16,000 Hz Specifications Type Cardioid condenser (electret bias) Frequency Response 40 to 16,000 Hz Polar Pattern Cardioid (unidirectional)--uniform with frequency, symmetrical about axis Output Impedance Rated at 150 ohms; 200 ohms actual Recommended Minimum Load Impedance 800 ohms 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) 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 Total Harmonic Distortion < 0.25% (130 dB SPL at 250 Hz into 800 ohm load) Maximum SPL 800 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-weighted 25 dB typical, weighted per DIN 45 505 Dynamic Range 119 dB (phantom); 101 dB (battery) (maximum SPL, 2000-ohm load, to A-weighted noise level) Signal-to-Noise Ratio 72 dB (IEC 651) at 94 dB SPL Overvoltage Protection Maximum External Voltage Applied to Pins 2 and 3 with respect to Pin 1: +52Vdc Reverse polarity protected to 75 Vdc Polarity Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3 Cartridge Capacitance 24 pF 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 Battery Operation Type: 1.5 V alkaline, AA size (NEDA 15A) Life: Up to 5,000 hours with fresh battery 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) Connector XLR professional audio 3-Pin Case Steel and brass construction with gray finish and stainless steel mesh grille Dimensions See User Guide Weight Net: 250 grams (8.8 oz) less battery Packaged: SM94-LC: 949.7 grams (2 lb 1 1/2 oz)
