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About Shure SM94 Instrument Microphone
Product Description 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. Amazon.com Ideal for instrument miking needs of professional musicians and sound engineers in both live performance and sound recording, the Shure SM94 is equally at home in sound reinforcement systems or in sound studios and motion picture/ TV scoring stages. 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 Shure SM94 instrument mic. Frequency response. Polar pattern. The SM94 can be powered by any phantom power source, or by an internal 1.5-volt AA battery. The battery, which serves as a backup power source in the event of phantom power failure, can provide up to 5,000 hours of continuous operation. When used with the optional wind-screen (available separately), the SM94 can be used by vocalists and speech-makers who desire a wide, flat response with minimum coloration. Key Features 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 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 Connector: XLR professional audio 3-Pin Case: Steel and brass construction with gray finish and stainless steel mesh grille Weight: 8.8 ounces (less battery) 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
