Earthworks M23R
Earthworks M23R
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Earthworks M23R

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The M23R is an omnidirectional measurement microphone with an operating frequency range of 3Hz to 23kHz. 

The unique thing about this mic is that each and every M23R has the same frequency response and sensitivity, matched to within +/-0.5dB across the entire operating frequency range.  This allows any M23R mic to act as a matched pair (or triple or quad) with any other M23R mics.  You can build your own matched array of reference mics at your own speed. Simply add more M23Rs whenever you need them.  Or equip your whole production team with mics you know will match, no matter what.  They'll match today, tomorrow, or 10 years from now. 

The M23R is 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.

Key Features:

    • All M23R microphones are matched within +/- .5dB of each other in Frequency Response and Sensitivity
    • Meets or exceeds type 1 specifications
    • Exceptionally uniform omnidirectional polar pattern
    • Requires 24-48V phantom power

    Whats in the Box?

    • 1 Earthworks M23R microphone
    • 1 Mic Clip
    • 1 Calibrator Adapter
    • 1 Calibration Chart
    • ** Electronic Calibration Files may be requested directly from Earthworks after mic has been registered


    Frequency Response
    3Hz to 23 KHz +/-0.5dB
    Polar Pattern Omnidirectional
    Sensitivity 36mV/Pa (-28.9 dBv/Pa)
    Power Requirements 24-48V Phantom, 10mA
    Max Acoustic Input 140dB SPL
    Output XLR-3 (pin 2+)
    Min. Output Load 600 ohms between pins 2 & 3
    Noise 20dB SPL (A-weighted)
    Operating Temp Range -4 to 140F (-20 to +60 C)
    Storage Temp Range -40 to 176 F (-40 to +80 C)
    Humidity Up to 90%
    Dimensions L x D
    6.25 x .860 in. (165 x 22 mm)
    Weight 0.35 lb. (1.60 kg)

    M23R Data Sheet