Shure BLX14R/SM35 Wireless Headworn Microphone System

The Wireless Headset System with SM35 features a durable, industry-standard microphone cartridge in a comfortable headset design for hands-free performance combined with simple setup and an intuitive interface for performance you can trust. Features rack-mount analogue wireless transmission.

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 BLX4R rack mount receiver, BLX1 bodypack transmitter, SM35 headset microphone, power supply, clothing clip, windscreens, rack mount hardware, and user guide.

Shure BLX14R/SM35 Features

• Simple setup and intuitive interface
• Up to 14 hours of battery life
• Single and dual rackmount kit offer flexibility in setup
• Wireless headset microphone fits securely and comfortably
• Flexible gooseneck in headset mic adjusts microphone placement

• BLX4R Rack Mount Receiver1
• BLX1 Bodypack Transmitter1
• SM35 Headset Microphone1
• Rack mount bracket1
• Long rack mount bracket1
• Link bracket1
• Hardware kit1
• Thread Adapter1
• 1/4 Wave antenna/BNC2
• BNC bulkhead adapters2
• Zippered vinyl bag1
• 22" BNC cables2
• Power supply1

• System
  • Working Range: 91 m (300 ft) Line of Sight
  • Audio Frequency Response: 50 to 15,000 Hz
  • 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.
• BLX1 Transmitter
  • Audio Input Level
  • max: -16 dBVmaximum
  • min (0 dB): +10 dBVmaximum
  • Gain Adjustment Range: 26 dB
  • Input Impedance: 1 MΩ
  • RF Transmitter Output: 10 mW, typical
  • 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)
• BLX4R Receiver
  • 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: –20.5 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: 1.65 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: 12–15 V DC @ 260 mA, supplied by external power supply (tip positive)
• SM35 Performance Headset Condenser Microphone
  • Type: Electret Condenser
  • Frequency Response: 40 Hz to 20,000 Hz
  • Polar Pattern: Unidirectional (Cardioid)
  • Output Impedance @ 1 kHz: 2400Ω
  • Audio Output Level: -59.0 dBV/Pa
  • Signal-To-Noise Ratio[1] @ 1 kHz: 55 dB
  • Maximum SPL[1] (1000Ω load, @ 1% THD): 153.0 dB
  • Dynamic Range[1] @ 1 kHz, 1000Ω load: 114.0 dB
  • Equivalent Output Noise[1] (Typical, A-Weighted): 39 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: 72 g (2.53 oz.)