Wireless, boundary microphone offers total freedom of placement with no holes to drill or cables to run.

The Microflex® Wireless Boundary Microphone offers total freedom of placement with no holes to drill or cables to run for installation.

The Wireless Boundary Microphone is the perfect solution for conference and meeting spaces where users demand flexibility and high performance. Compatible with Shure SLX® Wireless Systems.


Available Bands

G4 (470.125 – 493.825 MHz)  
G5 (494.125 – 517.750 MHz)  
H5 (518.200 – 541.800 MHz)  
J3 (572.200 – 595.800 MHz)  
L4 (638.200 – 661.800 MHz)


Which Band Should I Choose?

Find out which band for the MX690 has the most available wireless channels in your location. Already own the MX690? Use the Wireless Frequency Finder Tool to find frequencies.



Microphone Type


Lightweight, sensitive diaphragm. Precisely and smoothly captures sound nuances. Powered by battery or phantom power supply.

Polar Pattern


Picks up the most sound in front of the microphone and some from the sides. Less susceptible to feedback in high volume environments.

Frequency Response


Smooth, extended response. Tuned to accentuate specific types of instruments or voices.

Form Factor


Model Line


Microflex Microphones Product Brochure (PDF)
MX690 CAD Drawing (ZIP)
MX690 MX890 Specification Sheet (PDF)
MX690 MX890 User Guide (PDF)
Related Links
CAD Drawing (.zip)
FAQ's for MX690
CommShield® Technology White Paper
SLX Wireless Systems
  • 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
Condenser (electret bias)
Frequency Response
50–17000 Hz
Polar Pattern