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