Skip to product information
1 of 3

Earthworks M23R

Earthworks M23R

Regular price $599.00
Regular price Sale price $599.00
Sale Sold out FR HI-SEN
Click here to review our shipping policies.

US Delivery Only

View full details

The M23R is a factory-sorted M23. The unique thing about this mic is that each 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. 

Every M23R is delivered with its own printed frequency response chart. A detailed Electronic Calibration File (ECF) is generated for each microphone during final testing. Your microphones individual ECF can be downloaded from the Earthworks website after product registration.

Note: When measuring SPL at concert levels the relatively high sensitivity of Earthworks measurement microphones can overload most input device preamps. If SPL measurement is critical, we recommend that you confirm that your preamp’s max input level meets or exceeds +19 dBu to prevent overload. 


    • All M23R microphones are matched within +/- .5dB of each other in Frequency Response and Sensitivity
    • Polar Pattern: Omnidirectional
    • Frequency Response Characteristic: Free Field
    • Frequency Range: 3 Hz – 23,000 Hz (+/- .5 dB)
    • Sensitivity: 36 mV/Pa
    • Operating Voltage: 24-48V DC Phantom Power
    • Max SPL: 140 dB SPL


    • 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

    M23R Data Sheet