EARTHWORKS / M23R

This microphone is the de facto standard among professional engineers and acoustic researchers for its ability to accurately capture not only frequency characteristics but also the time domain and precisely measure audio waveforms. The numbers on each model indicate the upper limit of the frequency range that can be handled, and the M23 can measure frequencies up to 23 kHz.

Its robustness against temperature and atmospheric changes, clean and extremely fast impulse performance, and high stability enable precise measurements across a wide frequency range. Furthermore, its near-zero handling noise are key factors for precise measurements. This microphone can be used not only for sound field measurements, but also for the development, evaluation, and research of acoustic equipment.

■23kHz Measurement Microphone
The M23R is an economy model widely used for room treatment measurements, including acoustic design in recording studios. It is also widely favored by SMAART® users.

■Perfect Match
Every M23R has the same frequency response and sensitivity, and is tuned to within ±0.5dB across the entire operating frequency range (3Hz to 23kHz). Earthworks' proprietary technology enables individual tuning and calibration of every measurement microphone manufactured.

■Infinite Flexibility
With consistent performance, you can confidently add M23Rs as your measurement needs change. You can be confident that you'll be able to measure with the same characteristics tomorrow or 10 years from now.

■Reliable results, anytime, anywhere
As a reference microphone that matches all production teams, you can get consistent results wherever you are. Whether you're starting a multi-mic measurement or working with a new team, you can use it with confidence knowing that all microphones are matched.

- Frequency response up to 23kHz
- Achieves more faithful omnidirectional (omni)
- Flat frequency response in all directions and fast impulse response
- Supported by: SMAART®, MLSSA®, Spectrafoo®, TEF®, RTA, dbx, DEQX
- All Reference Series microphones are calibrated to within ±0.5dB across the entire operating frequency range (3Hz to 23kHz)
- 140dB SPL maximum acoustic input
- 24-48V phantom power

Specifications
Frequency Response: 3Hz to 23kHz ±0.5dB
Directivity: Omni
Sensitivity: 36mV/Pa (-28.9dBV/Pa)
Power Supply: 24-48V phantom, 10mA
Maximum Input Level: 140dB SPL
Output Connector: XLR (Pin 2 Hot)
Output Impedance: 65Ω, balanced (Pins 2 & 3)
Minimum Output Load: 600Ω (Pins 2 & 3)
Output Noise: Equivalent to 20dB SPL (A-weighted)
Operating Temperature Range: -4°C to 140°F (-20°C to +60°C)
Storage Temperature Range: -40°C to 176°F (-40°C to +80°C)
Humidity: Up to 90%
Dimensions: 165mm x 22mm
Weight: 160g