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The Shure Model 527C is a dynamic hand-held communications microphone designed for use in a variety of mobile and fixed station applications, including police, transportation, amateur radio and similar applications. The 527C offers extremely low sensitivity to hum pickup and low susceptibility to radio-frequency interference. A built-in solid state amplifier permits the use of up to 30 m (100 ft) of unshielded cable.

Features:

• Built-in amplifier
• Frequency response from 300 to 5,000 Hz, tailored for voice communications
• Low sensitivity to hum
• Low susceptibility to radio-frequency interference
• “Million-Cycle” leaf-type switch stands up under severe operating conditions and constant use
• High-impact ARMO-DUR case — lighter and stronger than die-cast metal, comfortable to the touch in hot or cold weather
• Rugged and dependable under all operating conditions
• Long-life neoprene-jacketed coil cord

Specifications:

• Type: Dynamic (with transistor preamplifier)
• Frequency Response: 300 to 5,000 Hz
• Sensitivity (at 1,000 Hz): Open Circuit Voltage ­31dBV/Pascal (28 mV)(1 Pascal = 94 dB SPL)
• Load lmpedance Range: 220 to 2,200 ohms
• Maximum Signal (with 10 Vdc, 470 ohm load, 135 dB SPL at 1,000 Hz produces +10 dBV (3.2V) at 10% THD
• DC Supply Voltage and Current: 4 to 35 Vdc
• Switch: Double-pole, single-throw, leaf-type
• Cable: Non-detachable, 1.8 m (6 ft), 4-conductor, neoprene-jacketed coil cord
• Case: Black high-impact ARMO-DUR®
• Net Weight: 342 grams (12 oz)
• Packaged Weight: 483 grams (17 oz)