Measurement Microphones

Accuracy, consistency, and reliability have made Earthworks measurement microphones the first choice of live sound professionals, acousticians, and researchers all over the world for nearly twenty years. Used on countless full-scale concert tours, as well as in scientific research laboratories, tropical rainforests, and rocket testing facilities, the M Series microphones have proven to be lab-grade audio instruments that can handle any environment.

Unparalleled Performance

With a hand-tuned and tested ruler-flat frequency response, Earthworks measurement microphones deliver audio performance that is unparalleled. Its consistent omnidirectional polar pattern at all frequencies and temperature-compensated electronics provides repeatable results you can trust every time, and eliminates proximity effect. And its physical design is optimized to ensure that the microphone has the most limited effect on your sound field.

For Any Environment

When the environment can change drastically, you want a measurement microphone whose results you can rely on no matter where you plug it in. From humid rainforests to freezing tundras, there is almost no environment that these microphones cannot handle. With a humidity rating up to 90% and operating temperature ranging from -20° C to +60° C, these microphones are optimized for consistent and reliable performance that always provides accurate wideband response.

Industry Standard

Extremely quick impulse response and linear phase response make Earthworks M Series microphones especially well-suited for use with 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 tuning, acoustics research and loudspeaker design.


  • Near-perfect omnidirectional polar pattern
  • Hand-tuned and tested ruler flat frequency response
  • Temperature-compensated electronics for repeatable results you can trust
  • Electronic calibration file generated for each microphone
  • Available in matched pairs and larger sets









23kHz Measurement Microphone

Cost effective omnidirectional test & measurement microphone with 9Hz – 23kHz ruler-flat frequency response


30kHz Measurement Microphone

Industry standard omnidirectional test & measurement microphone with 5Hz – 30kHz ruler-flat frequency response


30kHz Battery Powered Measurement Microphone

Battery powered omnidirectional test & measurement microphone with 9Hz – 30kHz ruler-flat frequency response for remote use


50kHz Measurement Microphone

Professional omnidirectional test & measurement microphone with ultra wide 3Hz – 50kHz ruler-flat frequency response