Shure SM94 Cardioid Instrument Condenser Microphone

Shure SM94 Cardioid Instrument Condenser Microphone

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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.

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


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 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 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


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

Power - Battery Operation

Type: 1.5 V alkaline, AA size (NEDA 15A)

Life: Up to 5,000 hours with fresh battery

Environmental Conditions

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)


Storage: 0-95% relative humidity at room temperature (72 degrees to 80 degrees F, 22 degrees to 27 degrees C)


XLR professional audio 3-Pin


Steel and brass construction with gray finish and stainless steel mesh grille


See User Guide


Net: 250 grams (8.8 oz) less battery

Packaged: SM94-LC: 949.7 grams (2 lb 1 1/2 oz)

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