The Shure BLX14/W85M Wireless Presenter System combines professional-quality sound with simple setup and up to 14 hours battery life for legendary audio performance right out of the box. The system includes BLX4 tabletop single-channel receiver, WL185m lavalier microphone with BLX1 bodypack transmitter, lavalier clip, power supply, 2 AA batteries, windscreens, and user guide.

Product Features

BLX4 Receiver Features

• 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 colour audio status indicator LED
• Green: Normal audio levels
• Red: Excessive audio levels (overload/clipping)
• Not rack-mountable

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)

WL185M Features

• Cardioid polar pattern
• 8 mm shorter than original WL18X series
• Higher dynamic range with improved max SPL, self-noise, and general sound quality when compared to the original WL18X series

Product Specifications

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.

BLX4 Receiver Specifications

• 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:  –27 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:  1.57 in. X 7.40 in. X 4.06in. (40 mm X 188 mm X 103 mm) H x W x D
• Weight:  8.5 oz. (241 g)
• Housing:  Molded ABS
• Power Requirements:  12–15 V DC @ 235 mA (BLX88, 320 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 MΩ
• 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)

WL185M Specifications

• Microphone Capsule:  Condenser
• Polar Pattern:  Cardioid
• Frequency Response:  70 Hz – 20 kHz
• Sensitivity 1 Pa = 94 dB SPL:  -37.0 dBV/Pa
• Self-Noise A-Weighted, Equivalent Acoustical:  19.5 dB SPL
• Signal-to-Noise Ratio (Using RPM400 Preamp):  74.5 dB
• Maximum SPL (1% THD):  134 dB SPL
• Dynamic Range:  114.5 DB
• Microphone Current Draw:  140-240 µA
• Bias Voltage Recommended Operating Voltage:  5 VDC Bias
• Polarity:  Positive pressure produces positive voltage on pin 3 with respect to pin 1
• Housing:  2.2 mm

What's in the Box?

• 1 x BLX4 Wireless Receiver for BLX Wireless System
• 1 x BLX1 Bodypack Transmitter
• 1 x Power Supply
• 1 x Carrying Case
• 2 x AA Batteries
• 1 x WL185m Low-profile Cardioid Lavalier Microphone
• 1 x Single-Mount Tie Clip
• 1 x Snap-Fit Windscreen
• 1 x Carrying Pouch