Shure MX690 MicroFlex Wireless Cardioid Boundary Microphone (G4 Band - 474-494 MHz)


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Dale #:SHUR-MX690G4

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  • 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.

    • 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

    Frequency Selection:Shure offers wireless systems in a selection of bands that conform to the different government regulations of specific nations or geographic regions. These regulations help limit radio frequency (RF) interference among different wireless devices and prevent interference with local public communications channels, such as television and emergency broadcasts.The system's band and frequency range are identified on the receiver and transmitter. For example, "H4 518-578 MHz."For information on bands available in your area, consult your local dealer or phone Shure.

    Microphone Placement:Place the MX690 within 1.5 m (5 ft.) of a talker. Aim the microphone toward the talkers and away from loudspeakers and noise sources. Use one microphone for every two talkers. Pickup angle with a cardioid cartridge is 130 deg. at "–3 dB. Receiver:Make sure the receiver is within sight of the transmitter. Do not place receiver behind a metal barrier or any reflective surface.The low-cut filter attenuates frequencies below 150 Hz by 6 dB per octave.

  • Operating Range30 m (100 ft.)
    Frequency Stability±10 ppm
    Maximum Frequency Deviation45 kHz
    Oscillator TypePhase-locked loop (PLL) controlled synthesizer
    Power Requirements3V (2 AA alkaline or rechargeable batteries)
    Battery Life>=8 hours (alkaline)
    Power Consumption130 mA, ±15 mA
    Operating Temperature Range-18–57 °C (0–135 °F)
    Dimensions43 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)
    Packaged516 g (18.2 oz)
    Microphone Specifications
    TypeCondenser (electret bias)
    Frequency Response50–17000 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 kohms 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)
    PolarityPositive 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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