SHURE / BLX14RSM31

This is a three-piece set from Shure, including the BLX1 bodypack transmitter, BLX4 wireless receiver, and SM31 condenser microphone, designed for simple setup and user-friendly operation.

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SAMSON / ESWC88XBHS5J-B

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Features an automatic channel selection function that chooses the optimal channel from 30 channels in the B band.Up to six sets can be used simultaneously in the same area. Suitable for a wide range of applications, including speeches, live performances, events, and conferences.

■ Wireless Microphone Set
Shure's BLX headset wireless system combines world-class design and construction with simple and easy setup and operation. It features QuickScan frequency selection and a durable SM31 headworn microphone for active performance applications. Easily reproduce legendary sound and performance.

■ Set Contents
SM31 Fitness Headset Cardioid Condenser Microphone
BLX1 Bodypack Transmitter
BLX4R Metal Rack-Mount Receiver

■ BLX1 Bodypack Transmitter
Audio Output Level: Maximum Gain -16 dBV maximum,
Minimum Gain (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 (Height x Width x Depth)
Weight: 75 g, without batteries
Housing: Molded ABS
Power Requirements: 2 LR6 AA batteries, 1.5 V, alkaline
Battery Life: Up to 14 hours

■ BLX4R Wireless Receiver
Output Impedance
XLR connector: 200 Ω
6.35 mm phone jack: 50 Ω
Audio Output Level
THD (Total Harmonic Distortion) Ref. ±33 kHz deviation, 1 kHz tone
XLR connector: -20.5 dBV (into 100 kΩ load)
6.35 mm phone jack: -13 dBV (into 100 kΩ load)
RF Sensitivity
-105 dBm for 12 dB SINAD, typical
Image Rejection
50 dB, typical
Dimensions: 50 mm X 198 mm X 163 mm (Height x Width x Depth)
Weight: 998 g, without antennas
Housing: Molded ABS
Power Requirements: 12-15 V DC @ 160 mA (BLX88, 320 mA), supplied by external power supply (tip positive)

■ SM31FH-TQG
Fitness Headset Microphone
Type: Condenser
Polar Pattern: Cardioid
Lowest Frequency Response: 45 Hz
Highest Frequency Response: 20 KHz
Sensitivity (dBV/Pa): -50 dBV/Pa
Weight: 60 g
Output Impedance: 600 Ω
Signal-to-Noise Ratio (S/N Ratio) : 66 dB
Maximum SPL : 145.0 dB / 1000 Ω load, @ 1% THD
Dynamic Range: 117.0 dB @ 1 kHz, 1000 Ω load
Equivalent Output Noise : 28 dB Typical, A-weighted
Power: +5 VDC (typical), 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
Connector: TA4F