The Shure MX690 Microflex Wireless Boundary Microphone offers total freedom of placement with no holes to drill or cables to run for installation. The MX690 plate mic is a both a microphone and a wireless transmitter and is the perfect solution for conference and meeting spaces where users demand flexibility and high performance. Compatible with Shure SLX wireless systems, including the SLX4L receiver with logic output for applications requiring logic functionality.

Shure MX690 Microflex Wireless Boundary Microphone 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

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Shure MX690 Microflex Wireless Boundary Microphone Specifications:

• Transmitter Specifications
• Operating Range: 100 ft (30 m) (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 degrees C (0—135 degrees F)
• (Note: Battery may limit this range)
• Dimensions (H x W x D): 1-11/16" x 3-3/8" x 5-13/16" (43 x 87 x 148 mm)
• Weight: 11.2 oz (318 g)
  
  Microphone
• 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 kohm 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.