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Shure SM81-LC Instrument Microphone

Shure SM81-LC Instrument Microphone
Item# SM81-LC
Factory List Price: $591.60
Sale Price: $414.12
This item is currently out of stock! Call for Availability

Product Description

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.



SM81-LC with windscreen, without cable. Phantom power required.



Type Condenser (electret bias)



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

Output Impedance 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)

Output Configuration and Connector Balanced, transformer-coupled output; male XLR connector

Sensitivity (at 1,000 Hz) Open Circuit Voltage: -45 dBV/Pascal (5.6 mV) (1 Pascal = 94 dB SPL)

Clipping Level (at 1,000 Hz) 800 ohm Load: -4 dBV (0.63 V) 150 ohm Load: -15 dBV (0.18 V)

Total Harmonic Distortion Less than 0.5% (131 dB SPL at 250 Hz into 800 ohm load)

Maximum SPL (at 1,000 Hz) 800 ohm load: 136 dB (attenuator at 0) 146 dB (attenuator at -10) 150 ohm load: 128 dB (attenuator at 0) 138 dB (attenuator at -10)

Hum Pickup -3 dB equivalent SPL in a 1 mOe field (60 Hz)

Self-Noise (equivalent sound pressure levels; measured with true rms voltmeter) 16 dB typical, A-weighted 19 dB typical, weighted per DIN 45 405

Signal-to-Noise Ratio 78 dB (IEC 651)* at 94 dB SPL *S/N ratio is difference between 94 dB SPL and product's equivalent self noise (SPL A-weighted).

Overvoltage and Reverse Polarity Protection Max. external voltage applied to pins 2 and 3 with respect to pin 1: +52 Vdc Reverse polarity protection: 200 mA max. (diode-clamped)

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

Cartridge Capacitance 54 pF

Low Frequency Response Switch Positions Flat; -6 dB/octave below 100 Hz; -18 dB/octave below 80 Hz

Attenuator Switch Positions (Lockable) 0 or -10 dB

Power Supply Voltage: 11 to 52 Vdc, positive, pins 2 and 3 Current Drain: 1.2 mA max.

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

Case Steel construction with vinyl metallic paint finish and stainless steel screens

Dimensions See User Guide

Weight Net: 230 grams (8 oz) Packaged: 740 grams (1 lb 10 oz)