Shure BLX14R/SM31 Wireless Rackmount Headset System BLX4R/SM31FH K3E

BLX4R Receiver Features

• One-touch QuickScan frequency selection quickly locates the best open frequency (in case of interference)
• Up to 12 compatible systems per frequency band (region-dependent)
• XLR and ¬º‚Äù output connectors
• Two-colour audio status indicator LED
• Green: Normal audio levels
• Red: Excessive audio levels (overload/clipping)
• Adjustable output level
• Removable antennas for quick antenna distribution
• LC Display with detailed RF and audio metering

BLX1 Bodypack Features

• For use as part of BLX and BLX-R Analogue Wireless Systems
• Power and battery status LED
• Adjustable gain control
• Quick and easy frequency matching
• AA batteries provide up to 14 hours of continuous use
• 100 m (300 ft.) operating range (line of sight)

SM31 Headset Features

• Wearable wireframe headset with secure, comfortable fit made for fitness and aerobics instructors
• Integrated moisture-repelling hydrophobic fabric protects the microphone element from harmful corrosion for use in humid environments
• Flexible gooseneck provides discrete adjustment options to optimize placement for greatest isolation
• Lightweight and low-profile form factors stave off fatigue during high-impact use
• Compatible with Shure wireless bodypack systems for direct replacement of TA4F-connected microphones
• Included windscreen tames plosive, breath and wind noises for clean and intelligible sound
• Tailored frequency response refined for crisp and clear vocal reproduction

System Specifications

• Working Range: 91 m (300 ft) Line of Sight Note: Actual range depends on RF signal absorption, reflection and interference.
• Audio Frequency Response: 50 to 15,000 Hz Note: 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)
• 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.

BLX4R Specifications

• Output Impedance
  • XLR connector: 200 Œ©
  • 6.35 mm (1/4") connector: 50 Œ©
• Audio Output Level Ref. ¬±33 kHz deviation with 1 kHz tone:
  • XLR connector: ‚Äì20.5 dBV (into 100 kŒ© load)
  • 6.35 mm (1/4") connector: ‚Äì13 dBV (into 100 kŒ© load)
• RF Sensitivity: -105 dBm for 12 dB SINAD, typical
• Image Rejection: >50 dB, typical
• Dimensions: 1.65 in. X 7.80 in.X 6.42 in. (42 mm X 198 mm X 163 mm) H x W x D
• Weight without antennas: 2.2 lbs (998 g)
• Housing: Molded ABS, steel
• Power Requirements: 12‚Äì15 V DC @ 260 mA, supplied by external power supply (tip positive)

BLX1 Bodypack Specifications

• Audio Input Level
  • max: -16 dBV maximum
  • min (0 dB): +10 dBV maximum
• Gain Adjustment Range: 26 dB
• Input Impedance: 1 MŒ©
• 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)

SM31 Headset Specifications

• Type: Electret Condenser
• Frequency Response: 45 to 20,000 Hz
• Polar Pattern: Unidirectional (Cardioid)
• Output Impedance @ 1 kHz: 600 Œ©
• Audio Output Level: -50 dBV/Pa
• Signal-To-Noise Ratio @ 1 kHz: 66 dB
• Maximum SPL 1000 Œ© load, @ 3% THD: 145.0 dB
• Dynamic Range @ 1 kHz, 1000 Œ© 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.)