Farralane.com - Shure BETA 53 Headworn Microphone

The BETA 53 is a fully adjustable omnidirectional condenser headworn vocal microphone, designed for applications where unconspicuous appearance and incredible sound quality are required. Its lightweight, adjustable, modular headband, flexible wireframe and soft earpieces provide a comfortable fit while still allowing the Beta 53 to be positioned as close to the left or right corner of the mouth as possible, assuring maximum voice pickup.

Comfortable, latex-free Dynaflex^® earforms that hide behind the ears
Thin, non-reflective wireframe that is easily hidden underneath hair
Ultra-thin detachable microphone boom mount for right or left positioning
Interchangeable frequency response caps (mild or high, two pieces each)
Two foam windscreens included

Type: Condenser (electret bias)
Frequency Response: 20Hz to 20KHz; View Larger
Polar Pattern: Omnidirectional
Output Noise (equivalent dBSPL, A-weighted): 39.0 dB typical; 42.0 dB maximum
Signal-to-Noise Ratio: 55 dB at 94 dB SPL
Recommended Minimum Input Impedance: >1 kilohm
Preamp Output Impedance: 136 ohms
Output Level, open circuit, ref. 1v/Pa at 1 kHz: -50.0 +/- 3.0dB 3.16mV

Maximum Sound Pressure Level: 147 dBSPL at 1% THD/1 kilohm load
Dynamic Range: 108 dB (max. SPL with 1k load, minus typical A-wt. noise)
Current Drain: 4.6 mA (preamp and microphone)
Output Polarity: Positive pressure on the diaphragm produces a positive voltage at:; Pin 2 relative to pin 3 at the output connector of the preamp
Power Requirements: Phantom power; 11 to 52 Vdc positive on pins 2 and 3, return on pin 1 (ground)
Net Weight: 135.35 g (4.75 oz.) microphone and in-line preamp
Cable: 1.5 m (5 ft.), small-diameter, shielded, with mini 4-pin connector (TA4F)