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  4. Shure SM81 Condenser Mic
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Shure SM81 Condenser Mic
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Shure SM81 Condenser Mic

Product Code: 433830

Cardioid condenser instrument microphone offers a wide frequency response and low self-noise.

Shure SM81 Condenser Mic £293.03 (INC VAT)
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Shure SM81 Condenser Mic

Features include flat response curve, low noise and high output clipping level, low distortion over a range of load impedances, and low RF susceptibility.


SM Microphones are equal to the demands of high-energy performance, proven time and time again through decades of rigorous use by performers and engineers of all experience levels.


The SM81 is the perfect choice for a professional musician or sound engineer who is looking to mic up acoustic instruments such as acoustic guitar, piano and cymbals. It can ideally be used on stage and because of its high quality is also at home in the recording studio.




  • 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


Furnished Accessories


  • swivel adapter
  • attenuator-switch lock
  • foam windscreen
  • carrying case
  • * Frequency Response: 20 to 20,000 Hz
  • * Polar Pattern: Cardioid
  • * Sensitivity (at 1,000 Hz): Open Circuit Voltage: -45 dBV/Pascal (5.6 mV) (1 Pa = 94 dB SPL)
  • * Impedance: Rated at 150 Ω (85 Ω actual) Recommended minimum load impedance: 800 Ω
  • * Output Clipping Level: 800 Ω Load: -4 dBV (0.63 V)
  • 150 Ω Load: -15 dBV (0.18 V)
  • * Maximum SPL (at 1,000 Hz): 800 Ω load: 136 dB (attenuator at 0) 146 dB (attenuator at -10)
  • 150 Ω load: 128 dB (attenuator at 0) 138 dB (attenuator at -10)
  • * Self-Noise: 16 dB typical, A-weighted
  • 19 dB typical, weighted per DIN 45 405
  • * Hum Pickup: -3 dB equivalent SPL in a 1 mOe field (60 Hz)
  • * Signal-to-Noise Ratio: 78 dB (IEC 651)* at 94 dB SPL S/N ratio is difference between 94 dB SPL and equivalent SPL of self– noise 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
  • * Power: 11 to 52 vdc, 1.2 mA
  • * Case: Steel construction with vinyl metallic paint finish and stainless steel screens
  • Connector: Three-pin professional audio connector (male XLR type)
  • * Weight: 230 g
  • * Dimensions: 212 mm L x 23.5 mm W at the widest point
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