Shure BLX14/SM31 Wireless Cardioid Fitness Headset Microphone System
Shure BLX14/SM31 Wireless Cardioid Fitness Headset Microphone System - BLX14/SM31-J11 is backordered and will ship as soon as it is back in stock.
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Shure BLX14/SM31 Wireless Cardioid Fitness Headset Microphone System
Product Overview
The Shure BLX14/SM31 is a wireless fitness headset microphone system built for instructors who need rugged, sweat-resistant speech reinforcement during high-movement activity. It pairs the SM31FH moisture-resistant cardioid condenser headset with a BLX1 bodypack and BLX4 receiver for reliable UHF wireless in fitness studios, training rooms, and multi-purpose rooms. This cost-effective wireless headset system is designed for demanding instructional and group-exercise environments.
Product Description
The BLX14/SM31 provides durable, hands-free vocal pickup for fitness and group-exercise instructors who move continuously and perspire heavily. The SM31FH headset uses a hydrophobic, moisture-resistant cardioid condenser element engineered to resist sweat and maintain clear speech during intense sessions. Its secure, lightweight headband stays in place through dynamic movement, while the cardioid pattern controls feedback in loud, music-driven rooms. One-touch QuickScan finds the best open frequency at setup, and microprocessor-controlled internal antenna diversity keeps the link stable across the floor. The BLX1 bodypack runs up to 14 hours on two AA batteries, and up to 12 compatible systems can operate per frequency band for facilities running multiple studios.
Key Features
- SM31FH Fitness Headset — A moisture-resistant cardioid condenser headset engineered to resist sweat during high-intensity instruction.
- Secure Lightweight Fit — The headband stays in place through dynamic movement for uninterrupted hands-free speech.
- Cardioid Pattern — Rejects off-axis sound to control feedback in loud, music-driven rooms.
- QuickScan Frequency Selection — One-touch scanning locates the best open frequency for fast, interference-resistant setup.
- Internal Antenna Diversity — Microprocessor-controlled diversity maintains a reliable link as the instructor moves.
- Scalable Operation — Up to 12 compatible systems per band support multi-studio facilities.
Typical Applications
- Training room
- Multi-purpose room
- Auditorium
- Commercial meeting space
Technical Specifications
| System Type | UHF analog wireless fitness headset system |
| Included Microphone | SM31FH moisture-resistant cardioid condenser headset |
| Transmitter | BLX1 bodypack |
| Receiver | BLX4 with QuickScan and internal antenna diversity |
| Polar Pattern | Cardioid |
| Working Range | Up to 300 ft (91 m) line of sight |
| Audio Frequency Response | 50 Hz – 15 kHz |
| Compatible Systems | Up to 12 per frequency band |
| Transmitter Battery Life | Up to 14 hours (2 AA) |
Frequently Asked Questions
What makes the SM31FH suited for fitness use?
Its moisture-resistant cardioid condenser element resists sweat and maintains clear speech during high-intensity instruction.
Will the headset stay in place during movement?
Yes. The secure, lightweight headband is designed to remain stable through dynamic, high-movement activity.
How do I prevent interference across multiple studios?
Run QuickScan at setup and coordinate up to 12 compatible systems per band for multi-room facilities.
Can it connect to an installed sound system?
Yes. The BLX4 receiver provides XLR and 1/4-inch outputs. For a rack-mount option, see the Shure BLX4R Rackmount Wireless Receiver.
Is support available?
Yes. Creation Networks provides expert AV support for setup and frequency coordination.
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
Nationwide Audiovisual Services, Design, Installation & Support
Creation Networks is a trusted nationwide partner for complete audiovisual solutions — delivering expert AV system sales, professional design, programming, installation, and ongoing support to organizations across the United States.
From Microsoft Teams Rooms and enterprise video conferencing to LED video walls, live streaming production, and hybrid collaboration systems, we provide end-to-end AV integration using premium, certified technology from industry leaders including Crestron, Q-SYS, Shure, Extron, and Absen.
Whether you operate a single location or manage facilities nationwide, Creation Networks ensures your AV systems are designed for reliability, scalability, security, and long-term performance — helping your organization communicate more effectively and operate at peak efficiency.
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