SONY ECM-66B Miniature Cardioid Directional Lapel Electret Condenser Microphone


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The ECM-66B miniature, lapel microphone is suitable for voice and musical instrument pick-up in noisy environments. The cardioid polar response allows the microphone to be positioned for picking up the sound source while rejecting background noises. It is supplied with a integral power barrel and it is terminated with an XLR connector.

Hands Free microphone
As a lapel microphone, the ECM-66B is an alternative to the traditional hand held microphone and being 'hands free' it allows the presenter to concentrate on her/his performance.

Simple to use in public address systems.
As a cardioid polar response microphone, the ECM-66B can help to reduce the potential problem of microphone 'howl round'. The alternative omni-directional microphones are more prone to creating audio feedback loops.

Versatile performance
The ECM-66B has an extended frequency response and high SPL handling, making it highly versatile.


  • Designed for a wide range of audio sources - The ECM-66B's capsule features an extended frequency response and it can handle high SPL signals.
  • Ready for wired applications - The ECM-66B is the wired microphone version with an XLR output and integral power supply barrel. It can either be powered by the external microphone amp or an internal battery (LR6/AA size).
  • Compact size - The capsule has a diameter of only 10.6mm and is 24mm long, making it easy to conceal.



    Audio Section
    Capsule Type: Electret Condenser
    Frequency Response: 70 Hz to 14 kHz
    Directivity: Uni-directional
    Sensitivity *[1]: -50.0 dB ±2 dB
    Output Impedance *[2]: 100Ω±20%, Balanced
    Dynamic Range: 101 dB or more
    Signal-to-Noise Ratio *[3]: 65 dB or more
    Inherent Noise *[4]: 29 dB SPL or less
    Induction Noise From External Magnetic Field *[5]: 5 dB SPL or less
    Wind Noise *[6]: 50 dB SPL or less (with windscreen)
    Maximum Input Sound Pressure Level *[7]: 130 dB SPL
    General Section
    Connector: B type. Supplied with XLR-3-12C (male) connector in power supply unit (single AA size battery)
    Mic Cable: 9.8 feet, 3 m
    Power Requirements: DC 1.5 V (AA size battery) or +48 V phantom power
    Battery Operating Time: Approx. 400 h (LR6)
    Power Consumption: Internal battery: 3.0 mA or less, External battery: 2 mA or less
    Dimensions *[8]: φ7/16 X 31/32 inches (Mic head), φ20.0 X 163 mm (Power unit XLR type), φ13/16 X 6 1/2 inches (Power unit XLR type), φ10.6 X 24.2 mm (Mic head)
    Mass: Approx. 5.9 oz (with power supply unit), Approx. 167 g (with power supply unit)
    Supplied Accessories: Urethane type windscreen (1), Single/vertical type tie clip (1), Single/horisontal type tie clip (1), Operating instructions (1), Mic case (1)
    Optional Accessories: Wind screen pack, Horizontal single-clip pack
    *[1] 0 dB = 1 V/Pa, at 1 kHz
    *[2] Output impedance at 1 kHz
    *[3] A-weighted, 1 kHz, 1 Pa.
    *[4] 0dB SPL = 20? Pa.
    *[5] dB SPL/1E-7 T, 0 dB SPL = 20? Pa.
    *[6] Wind noise at 2m/s (0 dB SPL = 20?Pa.)
    *[7] 0 dB SPL = 20? Pa.
    *[8] The values for dimensions are approximate.