PGA31 Headworn Wireless Microphone

The Shure PGA31 is a headworn electret condenser microphone for use with a wireless bodypack transmitter.

Wearing the Microphone

  1. Install the windscreen on the microphone boom.
  2. Place the headband around the back of the head, with the boom on the left side.
  3. Place the microphone at the corner of the mouth. To decrease pops and plosives, avoid placing the microphone directly in front of the mouth



Electret Condenser

Frequency Response

60 Hz to 20,000 Hz

Polar Pattern

Unidirectional (Cardioid)

Output Impedance

@ 1 kHz

600 Ω

Audio Output Level

-50.0 dBV/Pa

Signal-To-Noise Ratio [1]

@ 1 kHz

66 dB

Maximum SPL [1]

1000 Ω load, @ 3%THD

145.0 dB

Dynamic Range [1]

@ 1 kHz, 1000 Ω load

117.0 dB

Equivalent Output Noise [1]

typical, A-Weighted

28 dB

Power Requirements

+5 V DC (nominal), 10 V maximum (DC bias)


Positive pressure on diaphragm produces positive voltage on pin 3 with respect to pin 1


1.3 m (50 in.)



Net Weight

45 g (1.59 oz.)

[1] Measurements taken using RK100PK preamp set @ 0 dB using 8k bias resistor.

*All specifications measured with a 48 Vdc phantom power supply. The microphone operates at lower voltages, but with slightly decreased headroom and sensitivity.


Note: Testing is based on the use of supplied and recommended cable types. The use of other than shielded (screened) cable types may degrade EMC performance.

The CE Declaration of Conformity can be obtained from:

Authorized European representative:

Shure Europe GmbH

Headquarters Europe, Middle East & Africa

Department: EMEA Approval

Jakob-Dieffenbacher-Str. 12

75031 Eppingen, Germany

Phone: +49-7262-92 49 0

Fax: +49-7262-92 49 11 4