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  • M23

    Earthworks Audio M23 23KHZ Measurement Microphone

    The M23 is a precision engineered 23kHz omnidirectional measurement microphone ideally suited for acoustical measurements including loudspeaker design and quality control, sound system setup and troubleshooting, room acoustics, or any application where an accurate free-field measurement microphone is required.


    Unparalleled Audio Results at an Affordable Cost

    A flat frequency response that extends from 3Hz to 23kHz, an exceptionally consistent omnidirectional polar response, 140dB SPL rating without distortion and no handling noise.

    Consistent Measurements in Any Location

    Immune to most temperature and atmospheric fluctuations, the M23 delivers reliable and repeatable results in any environment.  

    Precision With Your Favourite Measurement Software

    The M23 works with any high-quality FFT-based real-time audio system measurement software, like SMAART™, SIM™, REW™, Electroacoustics Toolbox™, FuzzMeasure™ and others, as well as for use in PA system alignment and loudspeaker design.

    Electronic Calibration File

    Every M23 is individually hand-tuned and tested and is delivered with its own printed frequency response chart. An Electronic Calibration File (ECF) is generated for each microphone during final testing, and can be downloaded free of charge after product registration.


    FREQUENCY RESPONSE 3Hz -23kHz ±1/-3dB
    POLAR PATTERN Omnidirectional
    SENSITIVITY 34mV/Pa (-29dBV/Pa)
    POWER REQUIREMENTS 24-48V Phantom, 10mA
    OUTPUT XLR (pin 2+)
    OUTPUT IMPEDANCE 65Ω balanced (between pins 2 & 3)
    MIN OUTPUT LOAD 600Ω between pins 2 & 3
    NOISE 20dB SPL equivalent (A weighted)
    DIMENSIONS (L x D) 165mm x 22mm (6.5 x .860 inches)
    WEIGHT .36 lb. (160g)