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Earthworks M23R 23kHz Measurement Microphone  From Earthworks

Infinitely matched. Infinitely flexible.



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Manufacturer's Description from Earthworks

The M23R 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.


Infinitely Matched

Every M23R has the same frequency response and sensitivity – matched to within +/- 0.5dB across the entire operating frequency range (3Hz to 23kHz). 


Infinitely Flexible

Build your own matched array of reference microphones at your own speed. Simply add more M23Rs whenever you need them. They’ll match tomorrow or ten years from now. 


Consistent Results Across Space & Time

Start doing multi-mic measurements or equip new teams at any time with confidence that all of their reference microphones match.


About Manufacturer

Earthworks was formed by David Blackmer, the inventor of dbx, to realize his vision of upgrading the entire audio chain to a new standard of sonic realism. David's goal of creating high definition tools with which to capture the sound and experience of "being there" is based upon a strong evidence that there is more to human hearing than the range of frequencies which can be heard as tones. We are convinced that audio equipment with extended frequency response and faster, cleaner time domain performance will yield more life-like results. Traditional audio methadology appears to be based on working around the limitations, imperfections, and personality quirks of the equipment, and calling the ones you like "assets". WE believe that any part of the audio chain can be improved to the point where the standard is so high that any product meeting it will be indistinguishable from any other product meeting the same standard, and that an audio system built to such standard can achieve sonic reality. This standard, for electronic equipment, is met by our Zero Distortion Technology. We support the concept of recording acoustic events accurately enough to capture the sound as it happened in the room. This approah allows you to make sonic coloration and texture choices later, when you can consider them carefully and still have recourse. Life-like accuracy is the best starting point for whatever unique coloration you may wish to add.



POLAR PATTERN Omnidirectional

SENSITIVITY 36mV/Pa (-28.9dBV/Pa)



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)

OPERATING TEMPERATURE RANGE -4º to 140º F (-20º to +60º C)

STORAGE TEMPERATURE RANGE -40º to 176º F (-40 to +80º C)

HUMIDITY Up to 90%

DIMENSIONS (L x D) 165mm x 22mm (6.25 x .860 inches)

WEIGHT .5 lb. (225g)