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Wired Wireless
Solid reliability and superior sound have made our microphones the definition of tried-and-true. That’s why Shure microphones have been so legendary for so long.
MX690 Microflex Wireless Boundary Microphone

The Wireless Boundary Microphone is the perfect solution for conference and meeting spaces where users demand flexibility and high performance.

Features
Sleek, low profile design
Frequency agile, microprocessor controlled transmitter
Bi-color status indicator
IR link to SLX receiver for automatic frequency synchronization
Programmable mute function
Battery level indicator
Operates on two AA batteries
Logic output for remote LED and mute control
CommShield Technology for improved RF filtering

Specifications
Operating Range 30 m (100 ft.)
Note: Actual range depends on RF signal absorption, reflection, and interference

Frequency Stability
±10 ppm

Maximum Frequency Deviation
45 kHz
Oscillator Type Phase-locked loop (PLL) controlled synthesizer
Power Requirements 3V (2 AA alkaline or rechargeable batteries)
Battery Life =8 hours (alkaline)

Power Consumption
130 mA, ±15 mA

Operating Temperature Range
-18–57 °C (0–135 °F)
Note: Battery may limit this range
Dimensions 43 mmH x 87 mmW x 148 mmD (1 11/16 x 3 3/8 x 5 13/16 in.)
Weight
Net: 318 g (11.2 oz)
Microphone Specifications
Type Condenser (electret bias)
Frequency Response 50–17000 Hz

Polar Pattern (at 1 kHz)
Cardioid

Sensitivity (at 1 kHz , open circuit voltage)
–33 dBV/Pa (22 mV)
1 Pascal=94 dB SPL

Dynamic Range (1 kO load at 1 kHz)
96 dB
Common Mode Rejection (10 Hz to 100 kHz) 45 dB minimum
Preamplifier Output Clipping Level (1% THD) –6 dBV (0.5 V)
Polarity Positive sound pressure on diaphragm produces positive
voltage on pin 2 relative to pin 3 of output XLR connector or tip
of 1/4” phone plug.
 
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