Shure SM81 Instrument Microphone

The Shure SM81 is a high-quality, unidirectional condenser microphone designed for studio recording, broadcasting, and sound reinforcement. Its wide frequency response, low noise characteristics, and low RF susceptibility have made it a standard for applications involving acoustic instruments, especially guitar, piano, and cymbals. With it’s rugged constructed, this microphone has become a staple of our company. It operates on phantom power and performs over a wide range of temperatures and humidity conditions. It is furnished with a swivel adapter, attenuator-switch lock, and foam windscreen.



Frequency Response:

  20Hz through 20KHz

Polar Pattern:

  Cardioid (unidirectional) response-uniform with frequency, symmetrical about axis

Sensitivity (at 1,000 Hz):

  Open Circuit Voltage: -45 dBV/Pascal* (5.6 mV)  based on *1 Pascal=94 dB SPL*


  Rated at 150 ohms (85 ohms actual) - Recommended minimum load impedance: 800 ohms (May be used with loads as low as 150 ohms with reduced clipping level)

Low Frequency Response Switch Positions:

  Flat; -6 dB/octave below 100 Hz; -18 dB/octave below 80 Hz

Attenuator Switch Positions:

  0 or -10 dB - Lockable


  230 grams (8 oz)

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