Shure SM94 Instrument Microphone
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 FeaturesA sensitive mic with a wide, flat response ideal for live amplified and acoustic instruments.Extremely well-suited for reproduction of stringed instruments, woodwinds and cymbalsAA battery or phantom powerInternal shock mountWide dynamic rangeSmooth, flat frequency responseUniform Cardioid condenserSpecificationsType: Cardioid condenser (electret bias)Frequency Response: 40 to 16,000 HzPolar Pattern: Cardioid (unidirectional)--uniform with frequency, symmetrical about axisOutput Impedance: Rated at 150 ohms; 200 ohms actualRecommended Minimum Load Impedance: 800 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-Ω Load-14 dBV (0.63 V) (phantom), 1% THD;-23 dBV (0.71 V) (battery), 3% THDTotal 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-weighted25 dB typical, weighted per DIN 45 505Dynamic 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 SPLOvervoltage Protection:Maximum External Voltage Applied to Pins 2 and 3 with respect to Pin 1: +52VdcReverse polarity protected to 75 VdcPolarity: Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3Cartridge Capacitance: 24 pFConnector: XLR professional audio 3-PinCase: Steel and brass construction with gray finish and stainless steel mesh grilleWeight: 8.8 ounces (less battery)Power:Phantom OperationSupply Voltage: 11 to 52 Vdc, (+) pins 2 and 3Current Drain: 1.0 TO 1.2 mA max. at 52 VdcBattery OperationType: 1.5 V alkaline, AA size (NEDA 15A)Life: Up to 5,000 hours with fresh battery