Shure Incorporated BETA Series Headworn Microphone BETA 53

The BETA 53 is a fully adjustable omnidirectional condenser headworn vocal microphone, designed for applications where inconspicuous 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.
The BETA 53 microphone features an extended frequency response and high SPL handling ability. It is uniquely designed to provide the sound quality and performance consistency required for environments such as professional theater, event production, trade shows and seminars.
Type
Condenser (electret bias)
Frequency Response
20Hz to 20KHz
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)