The Shure BLX14/SM31 Wireless Fitness Headset Microphone System combines the moisture-resistant SM31FH headset microphone with Shure BLX wireless technology for fitness instructors, aerobics classes, active performers, and other hands-free vocal applications.
Designed for demanding environments where movement, perspiration, and reliable microphone positioning are important, the system includes a BLX4 single-channel wireless receiver, BLX1 bodypack transmitter, and SM31FH cardioid condenser fitness headset microphone.
With one-touch QuickScan frequency selection, up to 14 hours of transmitter battery life, and a wireless operating range of up to 300 feet (91 meters) under suitable line-of-sight conditions, the BLX14/SM31 provides a practical wireless solution for fitness facilities, studios, and live instruction.
SM31FH Moisture-Resistant Fitness Headset
The included Shure SM31FH is designed for active fitness and aerobics instruction. Its moisture-repellent construction uses hydrophobic materials to help protect the microphone element from perspiration and humidity.
A lightweight wireframe design provides a secure, comfortable fit, while the flexible gooseneck allows precise microphone positioning during movement.
Cardioid Condenser Microphone for Clear Instruction
The SM31FH uses a cardioid condenser microphone element with a frequency response tailored for vocal reproduction. Its directional pickup helps focus on the instructor's voice while reducing unwanted sound from the surrounding environment.
The included windscreen helps reduce breath and wind noise during energetic instruction and performance.
BLX1 Wireless Bodypack Transmitter
The compact BLX1 bodypack connects to the SM31FH through its TA4F/TQG connector. Adjustable gain control allows the input level to be matched to the microphone, while the accessible On/Off switch makes operation straightforward.
Powered by two AA alkaline batteries, the transmitter provides up to 14 hours of battery life.
BLX4 Wireless Receiver with QuickScan
The included BLX4 single-channel receiver features one-touch QuickScan frequency selection to help identify an available operating frequency.
Microprocessor-controlled internal antenna diversity supports consistent wireless reception. XLR and 1/4-inch audio outputs provide connection options for mixers, powered speakers, and other compatible sound equipment.
Designed for Fitness and Active Instruction
The BLX14/SM31 is particularly suited to applications where the microphone must stay positioned while the user moves. Its moisture-resistant headset construction and hands-free design make it useful for fitness classes, aerobics, group exercise, dance instruction, and other active vocal applications.
It can also be used for presentations and live performances where a secure headset is preferred over a handheld microphone.
Key Features
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Complete wireless fitness headset microphone system
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Includes BLX4 receiver, BLX1 bodypack, and SM31FH headset
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Moisture-repellent headset materials help protect against sweat and humidity
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Secure, lightweight wireframe design
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Flexible gooseneck for precise microphone placement
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Cardioid condenser element with tailored vocal response
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Included windscreen and cable clip
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Up to 14 hours of operation with two AA alkaline batteries
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Up to 300 ft. (91 m) line-of-sight wireless range
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One-touch QuickScan frequency selection
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XLR and 1/4-inch receiver outputs
