Shure SM81 Condenser Microphone (Used)


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Product Code: 2941-2
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Front End Audio acquires previously owned gear through our Buy-Back program. You can purchase used gear at a great price but there are no manufacturer warranties with these items. These items have been inspected and/or tested by our staff to make sure each one is in working condition and comes with our commitment to service. This Shure SM81 looks and functions perfectly and includes everything just as if you were to buy it brand new!

The Shure SM81 Condenser Microphone is a high-quality, unidirectional classic electret 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. The SM81 is ruggedly constructed. It operates on phantom power and performs over a wide range of temperatures and humidity conditions.

Shure SM81 Condenser Microphone Features

  • 20 Hz to 20 kHz frequency response
  • Flat response curve for accurate reproduction of sound sources
  • Low noise and high output clipping level
  • Low distortion over a wide range of load impedances
  • Cardioid polar pattern, uniform with frequency and symmetric about axis, providing maximum rejection and minimum coloration of off-axis sounds
  • Low RF susceptibility
  • Selectable low-frequency response: flat, 6 or 18 dB/octave rolloff
  • 0 dB/10 dB lockable attenuator switch
  • Phantom powering (DIN 45 596 voltages of 12 to 48 Vdc)
  • Rugged steel construction for durability
  • Field-usable over wide range of temperature and humidity conditions

Shure SM81 Condenser Microphone Specifications

  • Type Condenser (electret bias)
  • Frequency Response 20 to 20,000 Hz
  • Polar Pattern Cardioid (unidirectional) responseâ?"uniform with frequency, symmetrical about axis
  • Impedance 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 Level 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 - Load .4 dBV (0.63 V) 150 - Load .15 dBV (0.18 V)
  • Total Harmonic Distortion Less than 0.5% (131 dB SPL at 250 Hz into 800 . load )
  • Connector Output Configuration and Connector Balanced, transformer-coupled output; male XLR connector
  • Polarity Positive pressure produces positive voltage on pin 2 relative to pin 3
  • Dimensions 212 mm / 8.34 in./ in length, and 23 1/2 mm / 0.92 in./ in diameter. ( Handle diameter: 20.1 mm / 5/32 in. )
  • Weight 230 grams (8 oz)
  • Power Requirements Supply Voltage 11 to 52 Vdc, positive, pins 2 and 3 / Current Drain 1.2 mA max. The SM81 requires phantom power. This may be supplied to the microphone by a mixer, preamplifier or console with built-in phantom power or from an external power supply (such as the Shure model PS1A). Phantom power sources providing between 11 and 52 Vdc are suitable.

Shure SM81 Condenser Microphone Applications

  • Acoustic Guitar
  • Acoustic Bass
  • Strings
  • Piano
  • Woodwinds
  • Orchestra
  • Cymbals
  • Live Recording
  • Ensemble Vocals

Shure SM81 Condenser Microphone Includes

  • Shure SM81 Condenser Microphone
  • Shure Swivel Adapter
  • Shure Attenuator-switch Lock
  • Shure Foam Windscreen
  • Carrying Case

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