Farralane.com - Shure BETA 54 Headworn Vocal Microphone

The Shure BETA 54 is a subminiature, electret condenser headworn microphone. It provides uncompromised sound quality and reliability with minimal visibility in applications such as broadcast, theater, and touring. Despite the small size, the condenser element delivers full, clear, and natural reproduction of speech and vocals.

Supercardioid polar pattern provides maximum gain-before-feedback and ambient rejection
Extended frequency response tailored for vocal performances
Able to handle extremely high sound pressure levels (SPL)
Snap-fit foam windscreens stay in place during intensive movement

Type: Condenser (electret bias)
Frequency Response: 50Hz to 20KHz; View Larger
Polar Pattern: Supercardioid
Output Noise (equivalent dBSPL, A-weighted): 39.0 dB typical; 42.0 dB maximum
Signal-to-Noise Ratio: 55.0 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: -52.0 +/- 3.0dB 2.51mV

Maximum Sound Pressure Level: 149 dBSPL at 1% THD/1 kilohm load
Dynamic Range: 110 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)