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SM81 Instrument Recording Microphones

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SM81 Instrument Microphone


Product Code: 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.

SM81-LC - With windscreen, no cable. Phantom power required.
 

Features
The SM81 is ruggedly constructed. 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, foam windscreen, and case for carrying and storage. Other accessories are available.
  • 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

Specifications
  • 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
  • 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)

SHURE Pro Audio 120410 shure pro audioNext Index1
Performance Microphone | SM57 | SM58 | SM57+X2u | SM58+X2u | Beta 58A | Beta 57A | SM86 | SM87A | Super 55 | 55SH Series II | 520DX | Beta 52A | Beta 53
|
Beta 54 | Beta 56A | Beta 87A | Beta 87C | Beta 91 | Beta 98/S | Beta 98D/S | Beta 98H/C |
Beta 181 | Beta 91A | Beta 98A | Beta 98AMP | DMK57-52 | KSM137 | KSM141 | KSM9 | PG48 | PG52 | PG56 | PG57
|
PG58 | PG81 | PGDMK4 | PGDMK6 | SM10A | SM27 | SM48 | SM57 | SM81 | SM94 | Recording Microphone | SM57+X2u | SM58+X2u | 810 Modulink | Beta 52A
|
Beta 98H/C | El Diablo | Naked Eye | Proscenium | Recordist | Soundstage  | SPLx Custom | Studio Vocalist | KSM109 | KSM137 | KSM141 | KSM27 | KSM313
|
KSM32 | KSM353 | KSM44 | PG27USB | PG27 | PG42USB | PG42 | SM137 | SM27 | SM81 | VP88 | Installed Microphone | 545SD | 565SD | 104C | 450 Series II
|
503BG | 514B Handheld| 515 Series | 522 Desktop |
527B | 527C | 561 Gooseneck | 562 Gooseneck | 577B | 588SDX | 596LB Handheld | KS109 | KSM137 |
KSM42 | KSM44A
|
KSM141 | MX180/N | MX183 | MX202 | MX391 | MX395 | MX396 | MX405 | MX412 | SM11 | SM57 | Broadcast Microphone | MC50B | MX180/N | MX183 | SM2
|
SM63 | SM7B | SM89 | SM93 | VP64A,VP64AL | VP88 |
|