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SM81Instrument Microphone 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. Other accessories are available. Features:20 Hz to 20 kHz frequency responseFlat response curve for accurate reproduction of sound sourcesLow noise and high output clipping levelLow distortion over a wide range of load impedancesCardioid polar pattern, uniform with frequency and symmetric about axis, providing maximum rejection and minimum coloration of off-axis soundsLow RF susceptibilitySelectable low-frequency response: flat, 6 or 18 dB/octave rolloff0 dB/10 dB lockable attenuator switchPhantom powering (DIN 45 596 voltages of 12 to 48 Vdc)Rugged steel construction for durabilityField-usable over wide range of temperature and humidity conditions
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