Shure SM81-LC Cardioid Condenser with 10dB Attenuator and 3 Position Low-Cut Filter, with Foam Windscreen

Shure SM81-LC Cardioid Condenser with 10dB Attenuator and 3 Position Low-Cut Filter, with Foam Windscreen

The SM81-LC is a cardioid condenser microphone by Shure is used in live sound, broadcast, and recording scenarios. The SM81-LC is featured with a flat-frequency response between 20 Hz and 20 kHz and offers a switchable low-pass filter that can be set to either 6 dB/octave or 18 dB/octave. Other features, such as a lockable -10 dB pad and SPL handling of 146 dB (with the pad on), make the microphone is perfect for a various situations.

This mic sports a cardioid polar pattern that helps it achieve a high level of gain before inducing feedback, ensuring the mic will work well on the stage. This polar pattern also sports excellent off-axis rejection, helping to retain isolation in live and studio recordings.

The SM81-LC offers the kind of durability one would expect from Shure as well as low susceptibility to RF issues in the field. Its steel construction ensures the mic can be used in a variety of conditions, though phantom power is required to operate the SM81-LC.

Key Features at a Glance

• Uniform cardioid pick-up pattern provides lots of gain before feedback on stage, as well as rejection of off-axis sound
• Flat-frequency response from 20 Hz to 20 kHz for accurate reproduction of sound sources  
• Selectable low-frequency response (flat, 6 dB/octave, or 18 dB/octave roll-off)
• Vinyl-coated steel construction and stainless steel screen resist wear and abuse
• High sound pressure level (SPL) handling
• Low susceptibility to RFI
• Lockable -10 dB attenuator switch
• Performs over a wide range of temperature and humidity conditions
• Phantom powered
• Rugged and reliable

Shure SM81

• Transducer: (Electret Bias) Condenser
• Polar Pattern:  Cardioid
• Frequency Response: 20 Hz to 20 kHz
• Signal-to-Noise Ratio:  78 dB (at 94 dB SPL)
• Maximum Input Sound Level:  136 dB (@ 250 Hz 0.5% THD)
  146 dB (with Pad)
• Power Requirements: 11 to 52 VDC Phantom Power
• Output Impedance: 150 Ohms (85 Ohms Actual)
• Output Connectors:  XLR-3M Type
• Pad: -10 dB Attenuation
• Low Frequency Roll-Off:  -6 dB/Octave at 100 Hz
  -18 dB/Octave at 80 Hz
• Sensitivity: -45 dBV/Pa, 5.6 mV (at 1 kHz)
• Self Noise: 16 dBA Typical
  19 dB Typical (Weighted per DIN 45 405)
• Maximum SPL: 136 dB (1 kHz at 1% THD, 1 kOhm Load), 146 (-10 dB Pad On)
• Clipping Level: -4 dBv, 0.63 V (1 kHz at 0.25 THD, 1 kOhm Load)
• Hum & Noise: -3 dB, Typical at 60 Hz, Equivalent SPL/mOe
• Housing: Steel Construction with Vinyl Metallic Print Finish and Stainless Steel Screens
• Applications: Sound Reinforcement, Broadcast, and Studio Recording
• Operating Temperature: 20 to 120°F / -6.7 to 49°C
• Storage Temperature: -20 to 165°F / -29 to 74°C
• Relative Humidity:  0 to 95%
• Dimensions: Mic Body Diameter x Length: 

  0.79 x 8.4" / 20 x 212 mm
  Capsule Diameter: 0.9" / 23.5 mm 

• Weight: 0.5 lb / 0.2 kg

Packaging Info

• Package Weight: 1.775 lb
• Box Dimensions (LxWxH): 11.9 x 6.05 x 3.05"