The CM-311A is the latest version of the Crown's proprietary Differoid technology. Differoid stands for differential cardioid. Its cardioid pickup pattern rejects sounds from the rear, such as floor monitors. Its noise-canceling ability also rejects sounds at a distance, such as instruments on stage and crowd noise. This results in the CROWN CM-311A having outstanding gain-before-feedback and isolation. Controlled field tests showed that the Differoid provides up to 12dB more gain before feedback than conventional cardioid microphones. Many users of the Differoid say that their house mix is better because the mic's isolation is nearly complete.

Designed for touring and live-sound applications, the Crown CM-311A is a rugged headworn microphone with unequalled performance. It sounds like the best handheld microphones full, clear and distortion-free, even with the loudest singers. Lightweight and comfortable, the mics headband and boom adjust to fit any singer. An included pop filter greatly reduces breath noise and pops. Because of the booms unique behind-the-ear design, it does not cover up the singers face.
  • Cardioid polar pattern
  • Defferoid noise cancelling technologie
  • Outstanding gain-before-feedback and isolation
  • Premium headworn microphone
  • Hands-free use
  • Applications
    • Lead vocals
    • Backing vocals
    • Lectern
    • Intercom systems

    WARNING: Cancer and Reproductive Harm

    • Polar pattern: Cardioid
    • Frequency response: 50JHz to 17,000Hz
    • Sensitivity: CM-311A: 4 mV/Pa (-48 dBV); CM-311L: 1.25 mV/Pa (-58 dBV)
    • Maximum SPL: 148 dB
    • Equivalent noise level: 26 dB-A
    • Signal/noise ratio: 68dB (A-weighted)
    • Impedance: 75 ohms balanced
    • Powering: 18V to 48V phantom power to DIN/IEC
    • Finish: Satin black
    • Dimensions: ear to ear 5.5" (13.97 cm); boom 7" (17.78 cm), boom to mouth 3" (7.62)
    • Net weight: 61g (2.1 oz.)
    • Cable: 106 cm (42")
    3 year, no-fault parts and labor warranty on amps.
    3 year warranty for most mics.
    1 year warranty for Soundgrabber mic.
    Crown Extended Warranty available as an option.

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