Shure BLX14/P31 Wireless Lavalier Headset System
The Shure BLX14/P31 Wireless Lavalier Headset System offers professional-grade wireless audio performance with simple setup and reliable connectivity. This system includes the BLX4 single-channel wireless receiver, BLX1 bodypack transmitter, and the PGA31 performance headset microphone. Operating within Shure’s H8 frequency band (518 - 542 MHz), the system provides a clear 300-foot line-of-sight range, making it ideal for live performances, presentations, and active use.
The BLX1 bodypack transmitter is powered by two AA batteries, delivering up to 14 hours of continuous operation, ensuring long-lasting reliability on stage or in the field. The BLX4 receiver features microprocessor-controlled internal antenna diversity for stable signal reception, minimizing interference and dropouts. Its QuickScan feature automatically finds the best available frequency for effortless setup and seamless audio transmission.
PGA31 Performance Headset Condenser Microphone
Designed for multi-instrumentalists and active performers, the PGA31 is a lightweight, wearable wireframe headset microphone. Its permanently charged electret condenser element delivers crisp, detailed vocal reproduction. The cardioid polar pattern helps isolate the performer’s voice by rejecting unwanted ambient noise, while the flexible gooseneck design offers discreet and precise microphone placement. Equipped with a TA4F (TQG) connector, the PGA31 seamlessly integrates with Shure’s BLX wireless bodypack systems. A windscreen is included to reduce breath and wind noise, providing clear, professional sound for vocal and speech applications.
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Type
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Electret condenser
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Frequency Response
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60 Hz to 20 kHz
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Polar Pattern
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Cardioid
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Output Impedance
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600 ? @ 1 kHz, typical
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Audio Output Level
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-50 dBV/Pa
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Signal to Noise Ratio
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66 dB @ 1 kHz
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Maximum SPL
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145 dB, @ 1 kHz (1,000 ? load)
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Dynamic Range
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117 dB, @ 1 kHz (1,000 ? load)
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Output Noise
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28 dB, typical, A-weighted
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Power Requirements
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5 V DC (nominal), 10 V maximum (DC bias)
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Polarity
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Positive pressure on diaphragm produces positive voltage on pin 3 with respect to pin 1
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Cable
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50" (1.3 m))
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Connector
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TA4F
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Weight
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1.59 oz (45 g)
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BLX4 Single-Channel Wireless Receiver:
The BLX4 Single-Channel Wireless Receiver is a single-channel receiver set to Shure's H8 frequency band and operates between 518 to 542 MHz. It has microprocessor-controlled internal antenna diversity for reduced signal interference and dropouts. The one-touch QuickScan frequency selection feature allows you to quickly locate the frequency with the least amount of interference available. Its front-panel dual-color LED status indicator displays green for normal levels and red when clipping for fast metering. It has an XLR output in additional to an instrument level ¼" output. The BLX4 can be used with up to 11 other compatible systems simultaneously per frequency band.
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Output
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1x XLR Output 1x 1/4" (6.35 mm) Output
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Output Impedance
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XLR: 200 ? 1/4": 50 ?
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Audio Output Level
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XLR Connector: -27 dBV into 100k? Load (Reference /-33 kHz with 1 kHz Tone) 1/4": -13 dBV into 100k? Load (Reference /-33 kHz with 1 kHz Tone)
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RF Sensitivity
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-105 dBm for 12 dB SINAD, Typical
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Image Rejection
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>50 dB, Typical
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Housing
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Molded ABS
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Power Requirement
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12 to 15 V DC @ 160 mA, Supplied by External Power Supply (Tip Positive)
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Dimensions (H x W x D)
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1.5 x 7.4 x 4.1" (40 x 188 x 103 mm)
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Weight
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8.5 oz (241 g)
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BLX1 Bodypack Transmitter: The BLX1 Bodypack Transmitter is designed for use with Shure's BLX wireless systems. It is set to the H8 frequency band and operates between 518 and 542 MHz. It has a TQG input and can be used with Shure lavalier, headset, earset and instrument microphones. With the optional WA302 adapter cable, the BLX1 can be used as a transmitter for guitar. The unit has a top panel mounted on/off switch as well as volume control for quick access while speaking or performing. The BLX1 is powered by the two included AA batteries for up to 14 hours.
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Audio Input
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Gain: -16 dBV (Maximum), 10 dBV (Minimum
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Gain Adjustment Range
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26 dB
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Input Impedance
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1 M?
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RF Output
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10 mW, Typical
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Housing
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Molded ABS
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Power Requirement
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2x LR6 AA Batteries, 1.5 V Alkaline
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Battery Life
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Up to 14 Hours
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Dimensions (H x W x D)
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4.3 x 2.5 x 0.8" (110 x 64 x 21 mm)
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Weight
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2.6 oz (75 g)
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