Shure BLX14/SM31 Wireless Fitness Headset Mic System
DETAILS
Shure BLX14/SM31 – Professional Wireless Audio for Active Performers.
The Shure BLX14/SM31 Wireless Fitness Headset System delivers clear, professional-quality audio for instructors, presenters, and performers who need hands-free operation and freedom of movement. Perfect for gyms, fitness studios, schools, places of worship, conference rooms, and live demonstrations, this system provides reliable, wireless sound even during high-energy sessions.
The SM31FH headset microphone features a unidirectional cardioid condenser capsule and hydrophobic moisture-repelling construction, making it ideal for humid or high-intensity environments. Its lightweight, low-profile design ensures comfort during prolonged use, while the flexible gooseneck allows precise positioning for optimal vocal clarity. The included BLX1 bodypack transmitter integrates seamlessly with the BLX4 single-channel receiver for simple setup and dependable wireless performance.
With a range of up to 100 metres (line-of-sight) and up to 14 hours of battery life from two AA batteries, instructors and performers can move freely while maintaining consistent, high-quality audio. One-touch QuickScan frequency selection on the BLX4 receiver ensures interference-free operation, and dual-colour LED indicators help monitor audio levels and battery status at a glance.
The system includes the BLX4 receiver, SM31FH headset with BLX1 bodypack transmitter, clothing clip, windscreen, power supply, AA batteries, and user guide — a complete solution ready to use straight out of the box.
Shure BLX14/SM31 Key Features:
- Professional Sound Quality: Clear, intelligible vocal reproduction tailored for active and high-motion environments.
- Wireless Freedom: Up to 100 m (300 ft) line-of-sight range for unrestricted movement.
- Moisture-Repelling Headset: SM31FH construction protects the microphone from corrosion in humid conditions.
- Lightweight and Comfortable: Low-profile, ergonomic design reduces fatigue during prolonged use.
- Easy Setup: One-touch QuickScan automatically selects the clearest frequency.
- Extended Battery Life: Up to 14 hours of continuous use from two AA batteries.
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Versatile Applications: Ideal for fitness instructors, teachers, speakers, and live presenters.
SPECS & DOWNLOADS
Shure BLX14/SM31 Specifications:
- Working Range: Up to 100 m (300 ft) line-of-sight
- Audio Frequency Response: 45 Hz – 20 kHz (headset), 50 Hz – 15 kHz (receiver)
- Polar Pattern: Cardioid (unidirectional)
- Dynamic Range: 117 dB (headset), 100 dB A-weighted (receiver)
- Transmitter Gain Control: Adjustable up to 26 dB
- Receiver Outputs: XLR and 6.35 mm (1/4") connections
- Receiver Dimensions: 40 x 188 x 103 mm (H x W x D)
- Bodypack Dimensions: 110 x 64 x 21 mm (H x W x D)
- Bodypack Weight: 75 g (without batteries)
- Headset Weight: 60 g
- Power Requirements: 2 x AA batteries per transmitter (included)
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Battery Life: Up to 14 hours continuous use

