SM81 Cardioid Condenser Instrument Microphone

Shure SM81 Cardioid Condenser Instrument Microphone - Main Image

Shure SM81 Cardioid Condenser Instrument Microphone - Image 1

Shure SM81 Cardioid Condenser Instrument Microphone - Image 2

Price:: RRP: £392.40 inc VAT
Code:: SHUSM81LC
Manufacturer Code:: SM81-LC
Brand:: Shure

Main 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

The Shure Model 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. 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.

Product 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

Product Specifications

Type: Electret Condenser
Frequency Response: 20 to 20,000 Hz
Polar Pattern: Cardioid
Output Impedance: EIA rated at 150 Ω (85 Ω actual)
Sensitivity at 1 kHz, open circuit voltage: -45 dBV/Pa (5.6 mV)
Maximum SPL 1 kHz at 1% THD, 1 kΩ load: 136 dB SPL
Signal-To-Noise Ratio Ref. 94 dB SPL at 1 kHz: 78 dB
Clipping Level 1 kHz at 0.25% THD, 1 kΩ load: -4 dBV (0.63 V)
Hum Pickup typical, at 60 Hz, equivalent SPL/mOe: -3 dB
Polarity: Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
Weight: Net: 0.230 kg (0.5 lbs)
Attenuator Switch: 0 or −10 dB, lockable
Connector: Three-pin professional audio (XLR), male
Housing: Steel construction with vinyl metallic paint finish and stainless steel screens
Environmental Conditions:
- Operating Temperature: -6.7° to 49° C (20° to 120° F)
- Storage Temperature: -29° to 74° C (-20° to 165° F)
- Relative Humidity: 0 to 95%
Power Requirements: 11 to 52 V DC phantom power (1.2 mA)