Shure BLX14UK/SM31 Headset System with SM31FH - B-Stock

£282.90 RRP £307.50 (including VAT @ 20%)

This product is currently not available for purchase

  • Analogue Wireless Headset System
  • Ideal for Fitness Instruction
  • Includes SM31FH Headset Mic
  • BLX1 Transmitter and BLX4 Receiver
  • License Required for Ch. 38

Shure BLX14UK/SM31 Headset System with SM31FH - B-Stock


The Shure BLX14UK/SM31 Wireless Headset System is a high quality analogue wireless system, perfect for use in fitness and aerobics instruction. The system includes the versatile SM31 Cardioid Condenser Headset Mic, along with the reliable BLX1 Bodypack Transmitter and BLX4 Wireless Receiver, offering superior hands-free performance for a wide range of applications.

Please note, this is a B-Stock item. B-stock items are either ex repair or have previously been returned by another customer. The original boxing and manual may be missing, and there may be some slight signs of usage.
Otherwise, the unit operates as new.

This is a great opportunity to buy a fully functioning product at a discounted price, supplied with a one year warranty.

Software bundled with the original new product may have been registered or may no longer be included.

Product Ref: 80874

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Full Description

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Please Note: The Shure BLX14UK/SM35 Wireless System operates in the 606 - 630 MHz band. A valid license is required to operate wireless equipment in UHF Channel 38 (606 - 614 MHz).

SM31FH Cardioid Condenser Headset Mic

The Shure SM31FH-TQG Cardioid Condenser Headset Microphone is a versatile headworn mic, designed with fitness and aerobics instructors in mind. It features moisture-repellant hydrophobic materials, protecting the sensitive microphone element from damage in humid sport and fitness hall environments. The SM31FH features standard TA4F (TQG) connectivity, allowing it to integrate seamlessly with the included BLX1 bodypack transmitter.

BLX4 Dual Wireless Receiver

The Shure BLX4 Wireless Receiver features Shure's innovative QuickScan automatic frequency scanning system and microprocessor-controlled true diversity operation, providing incredibly consistent signal reception with minimal setup. The BLX4 receiver comes with both XLR and 1/4" outputs, making it perfect for a wide range of performers including vocalists, guitarists, bassists and more.

System Specifications

  • Compatible systems per frequency band: Up to 12
  • Selectable frequencies: Up to 150
  • Auto Setup Features: QuickScan - finds group with most compatible frequencies and sets to best frequency
  • Audio Reference Companding: Yes
  • Included Antennas: Internal
  • Transmitter Display: LED
  • Receiver Display: LED
  • Battery, Endurance: 2AA, up to 14h
  • Environment: Daily Touring
  • Operating Range: 91 m (line of sight - actual range depends on RF signal absorption, reflection and interference)
  • Operating Frequencies: 606 - 630 MHz
  • Audio Range: 50 Hz - 15 kHz (dependent on microphone type)
  • Transmitter RF Output Power: 10 mW, typical (varies by region)
  • Audio Output Connector: XLR and 1/4" (6.3 mm) unbalanced
    • Maximum Output Level: -27 dBV (XLR, mic level), -13 dBV (1/4")
  • Battery Life: Up to 14 hours
  • Dynamic Range: 100 dB A-weighted
  • System Distortion: 0.5% THD typical (ref. +/- 38 kHz deviation, 1 kHz tone)
  • Operating Temperature Range: -18°C (0°F) - +50°C (122°F)

Component Specifications

BLX4 Wireless Receiver

  • Output Impedance:
    • XLR Connector: 200 Ω
    • 6.35 mm (1/4") Connector: 50 Ω
  • Audio Output Level Ref. +/- 33 kHz deviation with 1 kHz tone:
    • XLR Connector: -27 dBV (into 100 kΩ load)
    • 6.35 mm (1/4") Connector: -13 dBV (into 100 kΩ load)
  • RF Sensitivity: 105 dBm for 12 dB SINAD, typical
  • Image Rejection: >50 dB, typical
  • Dimensions: 40 mm X 188 mm X 103 mm (H x W x D)
  • Weight: 241 g
  • Housing: Molded ABS
  • Power Requirements: 12–15 V DC @ 160 mA, supplied by external power supply (tip positive)

BLX1 Bodypack Transmitter

  • Audio Input Level:
    • Gain max: -16 dBV maximum
    • Gain min (0 dB): +10 dBV maximum
  • Gain Adjustment Range: 26 dB
  • Input Impedance: 1 MΩ
  • RF Transmitter Output: 10 mW, typical, varies by region
  • Dimensions: 110 mm x 64 mm x 21 mm (H x W x D)
  • Weight: 75 g, without batteries
  • Housing: Molded ABS
  • Power Requirements: 2x LR6 AA batteries, 1.5 V, alkaline
  • Battery Life: up to 14 hours (alkaline)