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Shure BLX14/SM31 Wireless Fitness Headset System with SM31FH Headset Microphone (H9 Band)
SKU
BLX14/SM31-H9
$389.00
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The SM31FH cardioid condenser microphone with analogue transmission, designed for use in fitness instruction, features moisture-repelling construction for true performance in humid applications where corrosion damage is common. 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. Includes BLX4 wireless receiver, BLX1 bodypack transmitter, SM31 fitness headset microphone, power supply, clothing clip, windscreens, and user guide. 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.
Shure BLX14/SM31 Wireless Fitness Headset System Features:
- Up to 12 compatible systems per frequency band (region dependent.)
- Microprocessor-controlled internal antenna diversity.
- One-touch QuickScan frequency selection quickly locates the best frequency.
- 1/4" and XLR audio outputs.
- Two color audio status indicator LED.
- Wireframe headset of the SM31FH cardioid condenser microphone fits securely and comfortably for fitness and aerobics instructors.
- 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.
Shure BLX14/SM31 Specifications:
System
Working Range: 91 m (300 ft) Line of Sight (Actual range depends on RF signal absorption, reflection and interference.)
Audio Frequency Response: 50 to 15,000 Hz (Dependent on microphone type)
Total Harmonic Distortion (Ref. ±33 kHz deviation with 1 kHz tone): 0.5%, typical
Dynamic Range: 100 dB, A-weighted, typical
Operating Temperature: -18°C (0°F) to 57°C (135°F) (Battery characteristics may limit this range.)
Polarity: Positive pressure on microphone diaphragm (or positive voltage applied to tip of WA302 phone plug) produces positive voltage on pin 2 (with respect to pin 3 of low-impedance output) and the tip of the high impedance 1/4-inch output.
BLX1
Audio Input Level:
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: 4.33 in. X 2.52 in. X 0.83 in. (110 mm X 64 mm X 21 mm) H x W x D
Weight: 2.6 oz. (75 g), without batteries
Housing: Molded ABS
Power Requirements: 2 LR6 AA batteries, 1.5 V, alkaline
Battery Life: up to 14 hours (alkaline)
Audio Input Level:
0dB: -20 dBV maximum
-10dB: -10 dBV maximum
Gain Adjustment Range: 10 dB
RF Transmitter Output: 10 mW, typical (varies by region)
Dimensions: 8.82 in. X 2.09 in. (224 mm X 53 mm) L x Dia.
Weight: 7.7 oz. (218 g) without batteries
Housing: Molded ABS
Power Requirements: 2 LR6 AA batteries, 1.5 V, alkaline
Battery Life: up to 14 hours (alkaline)
BLX4
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: 1.57 in. X 7.40 in. X 4.06in. (40 mm X 188 mm X 103 mm) H x W x D
Weight: 8.5 oz. (241 g)
Housing: Molded ABS
Power Requirements: 12–15 V DC @ 235 mA (BLX88, 320 mA), supplied by external power supply (tip positive)
SM31FH
Type: Electret Condenser
Frequency Response: 45 Hz to 20,000 Hz
Polar Pattern: Unidirectional (Cardioid)
Output Impedance @ 1 kHz: 600 Ω
Audio Output Level: -50.0 dBV/Pa
Signal-To-Noise Ratio [1] @ 1 kHz: 66 dB
Maximum SPL [1]: 1000 Ω load, 1 kHz@ 3%THD / 145.0 dB
Dynamic Range [1] @ 1 kHz, 1000 Ω load: 117.0 dB
Equivalent Output Noise [1] (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.)
[1] Measurements taken using RPM626 preamp set @ 0 dB using 8k bias resistor.
*All specifications measured with a 48 Vdc phantom power supply. The microphone operates at lower voltages, but with slightly decreased headroom and sensitivity.
(1) BLX1 Bodypack Transmitter
(1) SM31 fitness headset microphone
(1) BLX4 single-channel receiver
(1) PS24 Power Supply
(1) Clothing clip
(1) 95E16526 Carrying Case
(1) Windscreen
(1) User Guide
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