By: Shure
Microphones, Headphones & Wireless systems
Contact us for lowest price (800) 284-2288, (858) 565-1101,, or fax (858) 300-4193
Headset Wireless System

The BLX14/P31 Lavalier Wireless System from Shure includes a BLX4 single-channel wireless receiver, a BLX1 bodypack transmitter, and a PGA31 headset mic. The system is set to Shure's H8 frequency band and operates between 518 - 542 MHz.

The BXL1 bodypack transmitter has a 300' line of sight operation range with the BLX4 receiver. It is powered by two included AA batteries that can provide up to 14 hours of operation. The BLX4 receiver features microprocessor-controlled internal antenna diversity that helps prevent interference and signal dropouts. Its one-touch QuickScan feature detects the most interference-free frequency and sets the channel to it for fast setup.


Available Configurations Include:

BLX14/SM31  BLX14 Headset System with SM31

BLX14/P31 features include:

  • H8 Frequency Band
  • BLX4 Single-Channel Wireless Receiver
  • BLX1 Bodypack Transmitter
  • PGA31 Headset Microphone
  • One-Touch QuickScan Frequency Selection
  • Internal Antenna Diversity
  • 300' Operating Range
  • Batteries Included
Type Electret condenser
Frequency Response 60 Hz to 20 kHz
Polar Pattern Cardioid
Output Impedance 600 Ω @ 1 kHz, typical
Audio Output Level -50 dBV/Pa
Signal to Noise Ratio 66 dB @ 1 kHz
Maximum SPL 145 dB, @ 1 kHz (1,000 Ω load)
Dynamic Range 117 dB, @ 1 kHz (1,000 Ω load)
Output Noise 28 dB, typical, A-weighted
Power Requirements +5 V DC (nominal), 10 V maximum (DC bias)
Polarity Positive pressure on diaphragm produces positive voltage on pin 3 with respect to pin 1
Cable 50" (1.3 m))
Connector TA4F
Weight 1.59 oz (45 g)

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Prices and specifications subject to change without notice.