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Shure SM94 Instrument Microphone

Model: SM94-LC

Shure SM94 Instrument Microphone
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About: Shure 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


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

Positive pressure on diaphragm produces positive voltage on pin 2 relative to pin 3

Cartridge Capacitance
24 pF

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
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)

UPC: 042406051163 is a Canadian authorized Shure retailer.

Reviews: Shure SM94 Instrument Microphone

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Warranty: Shure SM94 Instrument Microphone Warranty:

30 Days

Manufacturer's Warranty:

2-year limited