Microflex Wireless Boundary Microphone

The Shure Microflex Microphone Series MX 690 offers total freedom of placement with no holes to drill or cables to run for installation.

The MX 690 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.

→ 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

Type	Condenser (electret bias)
Frequency Response	50–17000 Hz
Polar Pattern	Cardioid
Sensitivity (at 1 kHz , open circuit voltage)	–33 dBV/Pa (33 mV); 1 Pascal=94 dB SPL
Dynamic Range	96 dB (1 k ohm load at 1 kHz)
Common Mode Rejection	45 dB minimum (10 Hz to 100 kHz)
Preamplifier Output Clipping Level	-6 dBV (0.5 V) (1% THD)
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
MX690 and MX890 Transmitter	See below 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); Packaged= 516 g (18.2 oz)