Shure BLX14/SM31 Wireless Fitness Headset System, BLX4 Receiver, BLX1 Bodypack Transmitter & SM31 Cardioid Condenser Microphone

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.

FEATURES

BLX4 Wireless Receiver

• Up to 12 compatible systems (region dependent)
• Microprocessor-controlled internal antenna diversity
• One touch QuickScan locates the best open frequency
• ¼" and XLR audio outputs
• Two color audio status indicator LED
  - Green: Normal audio levels
  - Red: Excessive audio levels (overload/clipping)
  

BLX1 Wireless Bodypack Transmitter

• Adjustable gain control
• Power and battery status LED
• Quick and easy frequency matching
• 100 m (300 ft.) operating range (line of sight)
• AA batteries (included) provide up to 14 hours of continuous use

SPECIFICATIONS

System

• RF Bandwidth : 24 MHz
• Dynamic Range : 100 dBA
• Diversity : Antenna Diversity
• Max Systems per Setup : 12
• Number of RF Channels : 123
• Wireless Transmission : Analog UHF
• Included Transmitters : 1 x Bodypack
• RF Frequency Band : J10: 584 to 608 MHz
• Max Operating Range : 300' / 91.4 m (Line of Sight)

Receiver

• Housing : ABS
• Form Factor : Tabletop
• Weight : 8.5 oz / 241 g
• 1 x 1/4" TRS Female Output
• Antenna : 2 x Internal, Fixed
• Number of Audio Channels : 1
• Audio I/O : 1 x XLR 3-Pin Male Output
• Approximate RF Sensitivity : -105 dBm
• Power Requirements : AC/DC Power Adapter
• Operating Temperature : 0 to 135°F / -17 to 57°C
• Dimensions : 7.4 x 1.6 x 4.1" / 188 x 40 x 103 mm
• Frequency Response : 50 Hz to 15 kHz (Dependent on Mic)
• Impedance : XLR Output : 200 Ohms | 1/4" Output : 50 Ohms
• AC/DC Power Adapter : 12 to 15 VDC at 160 mA, Center-Positive (Included)
• Display & Indicators : 1 x Multi-Segment LED (Channel, Group) | 2 x LED (AF Level, Sync)
• Audio Output Level : XLR Output : -27 dBV (Mic Level) | 1/4" Output : -13 dBV (Instrument Level)

Microphone

• SNR : 66 dB
• Sound Field : Mono
• Weight : 2.12 oz / 60 g
• Impedance : 600 Ohms
• Polar Pattern : Cardioid
• Operating Voltage : 5 V
• Form Factor : Headworn
• Dynamic Range : 117 dB
• Cable Length : 3.61' / 1.1 m
• Maximum SPL : 145 dB SPL
• Capsule : Electret Condenser
• Equivalent Noise Level : 28 dB
• Frequency Range : 45 Hz to 20 kHz
• Output Connectors : 1 x TA4/Mini XLR 4-Pin Female (Lockable)