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Shure SM81-LC Cardioid Condenser Handheld Wired Microphone with 10db Attenuator.
Mfr. Part: SM81LC SKU: VDSHSM81LC
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Item Includes
Swivel Adapter A57F - 10 dB Attenuator Lock 34A830 - Carrying/Storage Case 65A1797 - Windscreen 49A111.
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Description
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.
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Features
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20 Hz to 20 kHz frequency response |
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Flat response curve for accurate reproduction of sound sources |
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Low noise and high output clipping level |
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Low distortion over a wide range of load impedances |
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Cardioid polar pattern, uniform with frequency and symmetric about axis, providing maximum rejection and minimum coloration of off-axis sounds |
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Low RF susceptibility |
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Selectable low-frequency response: flat, 6 or 18 dB/octave rolloff |
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0 dB/10 dB lockable attenuator switch |
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Phantom powering (DIN 45 596 voltages of 12 to 48 Vdc) |
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Rugged steel construction for durability |
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Field-usable over wide range of temperature and humidity conditions |
Specifications
| Type | Condenser (electret bias) |
| Applications | Studio recording, broadcasting, and sound reinforcement,
A standard for applications involving acoustic instruments, especially guitar, piano, and cymbals. |
| Frequency Response | 20 to 20,000 Hz |
| Polar Pattern | Cardioid (unidirectional) response—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 §Ù Load .4 dBV (0.63 V) 150 §Ù 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. |
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