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The Shure BLX14/SM31 Wireless Fitness Headset System combines professional-quality sound with simple setup and up to 14 hours battery life for legendary audio performance right out of the box. The system includes BLX4 tabletop single-channel receiver, SM31FH headset microphone (w/ moisture-repelling construction) with BLX1 bodypack transmitter, clothing clip, power supply, 2 AA batteries, windscreens, and user guide.

Main Features

  • Available Transmitter Form factors: Bodypack
  • Operating range (up to): 100 m (Under typical conditions)

BLX4 Wireless Receiver for BLX Wireless System

  • Up to 12 compatible systems (region dependent)
  • Microprocessor-controlled internal antenna diversity
  • One touch QuickScan locates the best open frequency
  • ¼" and XLR audio outputs
  • Two color audio status indicator LED
    • Green: Normal audio levels
    • Red: Excessive audio levels (overload/clipping)

Bodypack Transmitter

  • Power and battery status LED
  • Adjustable gain control
  • Quick and easy frequency matching
  • AA batteries (included) provide up to 14 hours of continuous use
  • 100 m (300 ft.) operating range (line of sight)

Fitness Headset Condenser Microphone

  • Wearable wireframe headset with secure, comfortable fit made for fitness and aerobics instructors
  • Integrated moisture-repelling hydrophobic fabric protects the microphone element from harmful corrosion for use in humid environments
  • Flexible gooseneck provides discrete adjustment options to optimize placement for greatest isolation
  • Lightweight and low-profile form factors stave off fatigue during high-impact use
  • Compatible with Shure wireless bodypack systems for direct replacement of TA4F-connected microphones
  • Available with a wide range of Shure wireless systems, renowned for ease of use and reliable performance
  • Included windscreen tames plosive, breath and wind noises for clean and intelligible sound
  • Tailored frequency response refined for crisp and clear vocal reproduction
  • Legendary Shure precision engineering for durability and performance

 

Description

SUPERIOR AUDIO - Perform with Confidence
Get the show going with no wires attached. Professional Shure sound for every band and any vocal need.

RELIABLE SIGNAL - Extend your range
With a range of up to 300 feet (100m), you can take the show into the crowd without interruption.

EASY SETUP – Own the stage
BLX will have you up and running in record time with one-touch scan and selection.

BATTERY LIFE – 14 hours of power
Because BLX transmitters get up to 14 hours of power from a single pair of AA batteries, the show can go on and on (and on).

SYSTEMS EXPANSIONS – Run up to 12 channels per frequency band*
You’ll probably need to find a bigger stage before you run out of channels.
*Note: region and environment dependent.

VERSATILITY INCLUDED – You’ve got options
An impressive variety of Shure microphones are available in BLX systems, so you can find what works for you.

Components

Furnished Accessories

Amount Part Title
1 Power Supply Part PS24
1 clothing clip
1 windscreen

Available Variants

Specs

Technical specifications

BLX14/SM31 Specifications
Set Type:
Headset
Amount of Bodypacks:
1
Amount of Handhelds:
0
Amount of TQG Mics:
1
BLX4 Specifications
Weight:
241 g
Height x Width x Depth:
40.0 × 188.0 × 103.0 mm
Transmission:
Analog
Type of Power Supply:
External
Receiver Housings:
Molded ABS
Active Antenna Possible:
No
Bias via BNC:
No
Encryption:
No
High Density Mode:
No
Interference Detection:
No
Remote Control:
No
Number of compatible systems info:
12
DANTE-Enabled Products:
No
Scan Features:
Quick Scan
Sync Features:
None
Detachable Antennas:
No
Network ability:
No
Software control :
No
Logic:
No
Cascade:
No
Rack Hardware:
Optional: Urt2
Receiver Displays:
LEDs
Receiver type:
Single
Included antenna:
Internal
Line Mic Switch:
No
Image Rejection:
50 dB, typical
RF Sensitivity:
-105 dBm, for 12dB SINAD, typical
Phantom Power Protection:
Yes
BLX1 Specifications
Weight:
75 g
Height x Width x Depth:
110.0 × 64.0 × 21.0 mm
Battery life lithium:
0 h
Battery life alkaline:
14 h
Form Factor:
Bodypack
Transmitter housings:
Molded ABS
Audio Mute:
No
Detachable Antennas:
No
Switchable RF power:
No
Batteries:
AA
Battery Status:
Multi-Color LED
Connectors:
TQG
Frequency Diversity:
No
Functionality:
Transmitter
Gain adjustment range:
26 dB
High Density Mode:
No
Included antenna:
1/4 wave
Input impedance:
1000 kΩ
Transmission:
Analog
SM31FH Specifications
Weight:
60 g
Frequency Response:
45 Hz – 20 kHz
Frequency Response:
Tailored
Sensitivity:
-50.00 dBV/Pa – 3.16 mV/Pa
Equivalent Selfnoise:
28 dB(A)
Sound Pressure:
145.0 dB
Transducer Type:
Condenser
Polar Pattern:
Cardioid
Switchable low cut:
No
Connectors:
TQG (TA4F, 4-Pin Mini)
Attenuator:
No
Interchangeable Capsule:
No
Main Functionality:
Performance
Headphone Output:
No
Requires Phantom Power:
5v DC (bias) VDC
Cartridge:
Fixed

Downloads

Comparable products

Optional accessories

faq

Are the handheld transmitter capsules interchangeable?

No.

I perform all over Europe. What system should I buy?

The 2.4 GHz range that is used with GLX-D systems is usable globally without any need for registration. There is no UHF TV band used for BLX that can be used all over Europe and in many countries you need to register the systems.
Full list of Shure technical questions and answers

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