Shure BLX14/SM31 Headworn Wireless System


(2 reviews)


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The BLX14/SM31 Headworn Wireless System is part of the Shure Headworn wireless systems family.

Shure BLX Wireless Systems combine professional-quality sound with simple setup and an intuitive interface for legendary audio performance right out of the box. Precision-built and available in a variety of configurations, it’s the most accessible way to own the stage.

  • BLX4 Wireless Receiver
  • BLX1 bodypack transmitter
  • SM31 fitness headset microphone
  • Power supply
  • Clothing clip
  • Windscreens
  • User guide

SM31FH Fitness Headset Condenser Microphone
The rugged and durable SM31FH is a cardioid condenser microphone constructed with hydrophobic materials that make it ideal for true performance in fitness instruction applications.

The moisture-repellent cartridge housing ensures a long product life by protecting the microphone from the corrosion damage that causes typical fitness instruction headsets to fail. Features TA4F 4-pin (TQG) connectors that make it a viable replacement for any Shure wireless headset system.

  • Wireframe headset fits securely and comfortably for fitness and aerobics instructors
  • Moisture-repellent hydrophobic fabric protects the microphone cartridge from harmful corrosion that occurs in humid environments
  • Flexible gooseneck provides discrete adjustment capabilities to optimize placement for greatest isolation
  • Lightweight and low-profile design won’t fatigue instructors during high-impact use
  • TA4F (TQG) connector is compatible with any Shure wireless bodypack
  • Included windscreen tames plosive, breath, and wind noise for clean and intelligible sound
  • Tailored frequency response ideal for crisp, clear vocal reproduction
  • Legendary Shure precision engineering for durability and performance

BLX1 Bodypack Transmitter
The durable BLX1 features a lightweight, ergonomic design and adjustable gain control. For use with BLX Wireless Systems. Features up to 14 hours of continuous use with 2 AA batteries abd a 300 ft (100 m) transmission radius.

  • Quick and easy receiver frequency matching
  • TQG connection for use with Shure lavalier, headset, earset and instrument microphones and guitar cables
  • Easily accessible On / Off switch
  • Battery Life Up to 14 hours
  • Typical Operating Distance 300 ft (100 m) transmission radius

BLX4 Single Channel Receiver
The durable BLX4 features simple setup, intuitive controls, and microprocessor-controlled internal antenna diversity. One-touch QuickScan frequency selection quickly locates the best open frequency in case of interference. For use with BLX Wireless Systems.  

  • XLR and ¼" output connectors
  • Two-color audio status indicator LED
  • Compatible Systems per Band: Up to 12 (region dependent)

While our site does not specify wireless products by channel or frequency range, we do stock different ones. If you require a specific channel, please call us at 800-472-6274 and we will help you get the exact wireless product you are looking for.

Get your Shure BLX14/SM31 Headworn Wireless System today at the guaranteed lowest price from Sam Ash Direct with our 45-day return and 60-day price protection policy.

Things You Will Get:

    BLX4 Wireless Receiver
    BLX1 Bodypack Transmitter
    SM31 Fitness Headset Microphone
    Power Supply
    Clothing Clip
    User's Guide


by PowerReviews
ShureBLX14/SM31 Headworn Wireless System

(based on 2 reviews)

Reviewed by 2 customers

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Great Bang for your Buck!


from Edison, NJ

Staff Reviewer

Comments about Shure BLX14/SM31 Headworn Wireless System:

This BLX Wireless System feels rugged, durable and lightweight, qualities one demands in a wireless headworn system. The cardioid condenser microphone made this ideal for corporate presentation or fitness instruction as it allows the user freedom to move around without having to be concerned that the unit will stay in place and continue to sound properly. The 'sweat proof' housing ensures a long life no matter what it is put though.

The unit includes a clothing clip, and windscreens making it useable for multiple people to use with in a short period of time. The windscreens do a great job of reducing natural noises such as breathing and wind noise. This is the go-to headset for any fitness instructor, gym teacher or any one else who needs durability coupled meticulously with sound quality and clarity.

  • Was this a gift?:
  • No

Great Activity Headset mic!


from Atlanta

Verified Reviewer


  • good range
  • quality sound
  • reliability


    Best Uses

      Comments about Shure BLX14/SM31 Headworn Wireless System:

      This Shure headset mic is destined to be a hit with the active user. From churches to Gyms, Schools, and many others, Shure has become a staple in both the wired and wireless mic community. This is a well made product with features available from many higher end systems. If you're looking for a quality headset mic, this one won't disappoint!

      • Was this a gift?:
      • No

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      Series BLX
      Model BLX14/SM31
      Polar Pattern Cardioid
      Frequency Response 40Hz-20kHz
      Output Impedence N/A
      Dynamic Range (SPL) 145dB
      Low Cut Filter N/A
      Connector Type Mini XLR
      Self Noise 28dB
      Pad No
      Weight Headset: 60 g (2.11 oz.)
      Matched Pair No
      Warranty Info:

      Monitor mixers, personal monitors, phonograph, wireless: One year parts and labor Wired microphones: Two years parts and labor