Description
The BLX14/SM31 Headworn Wireless System is part of the BLX wireless systems family. Shure BLX Wireless Systems combine professional-quality sound with simple setup and an intuitive interface for legendary audio performance right out of the box. Precision-built and available in a variety of configurations, it’s the most accessible way to own the stage.
It includes BLX4 wireless receiver, BLX1 bodypack transmitter, SM31 fitness headset microphone, power supply, clothing clip, windscreens, and user guide.
BLX1 Bodypack Transmitter
The durable BLX1 features a lightweight, ergonomic design and adjustable gain control. For use with BLX Wireless Systems. It supports up to 14 hours of continuous use with 2 AA batteries. 300 ft (100 m) transmission radius.
Features
- Quick and easy receiver frequency matching
- TQG connection for use with Shure lavalier, headset, earset and instrument microphones and guitar cables
- Easily accessible On / Off switch
BLX4 Single Channel Receiver
This is single channel wireless receiver with microprocessor-controlled internal antenna diversity. The durable BLX4 features simple setup, intuitive controls, and microprocessor-controlled internal antenna diversity. One-touch QuickScan frequency selection quickly locates the best open frequency in case of interference. For use with BLX Wireless Systems.
Features
- XLR and ¼" output connectors
- Two-color audio status indicator LED
- Green: Normal audio levels
- Red: Excessive audio levels (overload / clipping)
SM31FH Fitness Headset Condenser Microphone
The rugged and durable SM31FH is a cardioid condenser microphone constructed with hydrophobic materials that make it ideal for true performance in fitness instruction applications.
The moisture-repellent cartridge housing ensures a long product life by protecting the microphone from the corrosion damage that causes typical fitness instruction headsets to fail.
Available in bundled BLX and GLX-D wireless systems, the SM31FH features TA4F 4-pin (TQG) connectors that make it a viable replacement for any Shure wireless headset system.
Features
- Wireframe headset fits securely and comfortably for fitness and aerobics instructors
- Cardioid polar pattern
- Headset microphone for wireless systems used in fitness instruction
- Condenser cartridge with moisture-repellent housing that resists corrosion
- Moisture-repellent hydrophobic fabric protects the microphone cartridge from harmful corrosion that occurs in humid environments
- Flexible gooseneck provides discrete adjustment capabilities to optimize placement for greatest isolation
- Lightweight and low-profile design won’t fatigue instructors during high-impact use
- TA4F (TQG) connector is compatible with any Shure wireless bodypack
- Included windscreen tames plosive, breath, and wind noise for clean and intelligible sound
- Tailored frequency response ideal for crisp, clear vocal reproduction
- Available with bundled BLX and GLX-D wireless systems
- Legendary Shure precision engineering for durability and performance
Specifications
Overall System Specifications
- Operating Range: 300 ft (91 m) line of sight
(actual range depends on RF signal absorption, reflection and interference) - Available Frequencies: Between 524 – 865 MHz
(available frequencies depend on applicable regulations in country where system used) - Audio Range: 50 – 15,000 Hz
(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)
- BLX4 Power Requirements: 12 – 18 V DC at 150 mA, supplied by external power supply
BLX1 Bodypack Transmitter
- Audio Input Level
- Gain max -16 dBV maximum; 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 (2.6 oz.), without batteries
- Housing Molded ABS
- Power Requirements 2 LR6 AA batteries, 1.5 V, alkaline
- Battery Life up to 14 hours (alkaline)
BLX4 Single Channel 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 (8.5 oz.)
- Housing Molded ABS
- Power Requirements 12–15 V DC @ 160 mA (BLX88, 320 mA), supplied by external power supply (tip positive)
SM31FH Fitness Headset Microphone
- Type Electret Condenser
- Frequency Response 45 to 20,000 Hz
- Polar Pattern Unidirectional (Cardioid)
- Output Impedance @ 1 kHz 600 Ω
- Audio Output Level -50 dBV/Pa
- Signal-To-Noise Ratio @ 1 kHz 66 dB
- Maximum SPL 1000 Ω load, @ 3% THD 145.0 dB
- Dynamic Range @ 1 kHz, 1000 Ω load 117.0 dB
- Equivalent Output Noise Typical, A-Weighted 28 dB
- Power Requirements +5 V DC (nominal), 10 V maximum (DC bias)
- Polarity Positive pressure on diaphragm produces positive voltage on pin 3 with respect to pin 1
- Cable 1.1 m (45 in.)
- Connector TA4F
- Net Weight 60 g (2.11 oz.)
