Shure BLX14/SM31 Fitness Headset Wireless System (H9: 512 - 542 MHz)

Model #BLX14/SM31-H9

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Specifications

Packaging Info

Box Dimensions (LxWxH) 13.5 x 12.0 x 3.8"
Box Dimensions (LxWxH) 7.7 x 6.4 x 3.1"
Box Dimensions (LxWxH) 11.1 x 5.3 x 3.2"

General Information

Output Impedance 600 Ω @ 1 kHz, typical
Audio Output Level -50 dBV/Pa
Signal to Noise Ratio 66 dB @ 1 kHz
Maximum SPL 145 dB, @ 1 kHz (1,000 Ω load)
Dynamic Range 117 dB, @ 1 kHz (1,000 Ω load)
Output Noise 28 dB, typical, A-weighted
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 45" (1.1 m)
Connector TA4F
Weight 2.11 oz (60 g)
Output 1x XLR Output 1x 1/4" (6.35 mm) Output
Output Impedance XLR: 200 ohms 1/4": 50 ohms
Type Electret condenser
RF Sensitivity -105 dBm for 12 dB SINAD, Typical
Image Rejection >50 dB, Typical
Housing Molded ABS
Power Requirement 12 to 15 V DC @ 160 mA, Supplied by External Power Supply (Tip Positive)
Dimensions (H x W x D) 1.5 x 7.4 x 4.1" (40 x 188 x 103 mm)
Weight 8.5 oz (241 g)
Audio Input Gain: -16 dBV (Maximum), 10 dBV (Minimum)
Gain Adjustment Range 26 dB
Input Impedance 1 MOhm
RF Output 10 mW, Typical
Housing Molded ABS
Power Requirement 2x LR6 AA Batteries, 1.5 V Alkaline
Battery Life Up to 14 Hours
Dimensions (H x W x D) 4.3 x 2.5 x 0.8" (110 x 64 x 21 mm)
Weight 2.6 oz (75 g)
Audio Output Level XLR Connector: -27 dBV into 100 kOhms Load (Reference +/-33 kHz with 1 kHz Tone) 1/4": -13 dBV into 100 kOhms Load (Reference +/-33 kHz with 1 kHz Tone)
Frequency Response 45 Hz to 20 kHz
Polar Pattern Cardioid
Product Highlights
  • H9 Frequency Band
  • BLX4 Single-Channel Wireless Receiver
  • BLX1 Bodypack Transmitter
  • SM31FH Fitness Headset Microphone
  • One-Touch QuickScan Frequency Selection
  • Internal Antenna Diversity
  • 300' Operating Range
  • Batteries Included
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