Shure BLX14/SM31 Wireless Fitness Headset System with SM31FH Headset Microphone

Designed with Fitness, Moisture Rich Environments (plenty of sweat), and Energetic Performancesin mind
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The Shure BLX14UK/SM31 has been designed with fitness professionals in mind, although it could benefit anyone in a more moisture rich environment or a particularly hot and energetic physical performance situation.

The BLX14/SM31 Wireless System can handle your most intense workouts. The SM31 Fitness Headset is made from corrosion proof materials. You can sweat on it or shout into I and it will perform just as you need it.

Built to ensure rock solid signal from transmitter to receiver. Shure BLX Wireless Systems eliminate interference and drop-outs. You will sound completely clear. And thanks to one-touch Quickscan technology, all the hard work is done for you. Locating the best frequency for your performance is as easy as pushing a button. No trial and error. No complicated set up. Just one press.


Shure SM31FH-TQG Headset Mic

  • Comfortable and lightweight wire frame design
  • Moisture resistant fabrics protect mic from sweat
  • Super secure fit even during high energy workouts
  • Clear, detailed sound similar to quality handheld mics
  • Cardioid polar pattern focuses only on your voice
  • Flexible gooseneck for quick, easy adjustments
  • Windscreen tames wind and breath noise
  • Clothing clip keeps cable tucked away
  • Permanently charged condenser capsule (phantom power not required)
  • TA4F (TQG) connector compatible with any Shure bodypack

BLX1 Body Pack Transmitter

  • 14-hour run time and a 100 meter range from one pair of AA batteries
  • Quick and easy frequency matching
  • Continuously adjustable gain dial
  • Easily accessible on/off switch
  • Power & battery status LED
  • Clip-on design easily attaches to performer
  • Lightweight, comfortable, and discrete build
  • Rugged and robust - built for rigorous live performances
  • TA4F (TQG) connection for use with Shure headset, lavalier, instrument mics and guitar cables

BLX4 Single Channel Receiver

  • User friendly and intuitive design – no complicated setup options
  • One touch QuickScan finds the best open frequency for uninterrupted signal
  • Internal microprocessor-controlled antenna keeps the unit discrete and compact
  • Two colour LED for monitoring signal level
  • Compatible with up to 12 other systems
  • XLR & 1/4" audio outputs


SM31FH Headset Microphone

  • Connector: TA4F (TGQ)
  • Type: Condenser
  • Frequency Response: 45Hz - 20kHz
  • Polar Pattern: Cardioid
  • Output Impedance: 600Ω
  • Audio Output Level: -50 dBV/Pa
  • Signal-To-Noise Ratio: 66dB
  • Maximum SPL: 145.0 dB
  • Dynamic Range: 117 dB
  • Equivalent Output Noise: 28 dB
  • Power Requirements: +5 V DC, 10 V Maximum
  • Cable Length: 1.1m
  • Net Weight: 60 g

BLX1 Body Pack Transmitter

  • Connector Type: TA4F (TGQ)
  • Operating Range (Up To): 100 m
  • Batteries: AA (included)
  • Battery Life: 14 hours
  • Battery Status: Multi-Colour LED
  • Transmitter Housings: Molded ABS
  • Gain Adjustment Range: 26 dB
  • Included Antenna: 1/4 Wave
  • Input Impedance: 1 MΩ
  • Weight: 75 g
  • Dimensions (HxWxD): 110 mm x 64 mm x 21 mm

BLX4 Single Channel Receiver

  • Transmission: Analog
  • Power Supply: External
  • Receiver Type: Single
  • Number of Compatible Systems Per Frequency Band: 12
  • Receiver Displays: LEDs
  • Housings: Molded ABS
  • Scan Features: Quick Scan
  • Rack Hardware: Optional URT2
  • Image Rejection: 50 dB, Typical
  • RF Sensitivity: -105 dBm, For 12dB SINAD, Typical
  • Weight: 241 g
  • Dimensions (HxWxD): 40 x 188 x 103 mm