Earthworks M23 - Omni Measurement Microphone

In any situation where precision matters the M23 is a top choice, whether that's in live sound setup, speaker calibrations or anywhere accurate audio measurement is required.

The M23 is rugged too, rated at 140dB SPL without distortion, low handling noise and able to handle nearly any environmental conditions.

Extremely fast impulse response and linear phase response make the M23 ideal 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 alignment and loudspeaker design.

Every M23 is individually hand-tuned and tested and is delivered with its own printed frequency response chart. An Electronic Calibration File (ECF) is generated for each microphone during final testing, and can be downloaded free of charge after product registration.

• 23kHz flat frequency response
• Cost effective measurement microphone
• Improved version of the SMAARTMIC™ previously offered by EAW
• Ideally suited for acoustical measurements sound system setup and troubleshooting, room acoustics, or any application where an accurate free-field measurement microphone is required
• Omnidirectional polar pattern
• Flat frequency response, fast impulse response and exceptional polar characteristics
• Used by SMAART™, MLSSA™, Spectrafoo™, TEF™ and RTA in addition to acoustic measurement systems manufactured by dbx, DEQX and others
• Meets or exceeds ANSI Type 1 and applicable IEC 61094 requirements
• Each M Series microphone is delivered with its own calibration chart providing its individually measured open-circuit sensitivity and the frequency response curve
• Electronic Calibration File available
• Operating Temp Range: -20 deg C to +60 deg C ( -4 deg. F to 140 deg. F)
• Storage Temp Range: -40 deg C to +80 deg C ( -40 deg. F to 176 deg. F)
• Humidity: Up to 90%
• Re-calibration recommended every five (5) years

• Frequency Response: 3Hz to 23kHz ±1/-3dB
• Polar Pattern: Omnidirectional
• Sensitivity: 34mV/Pa (-29dBV/Pa)
• Power Requirements: 24 – 48V Phantom, 10mA
• Max Acoustic Input: 140dB SPL
• 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)
• Dimensions L x D: 165mm x 22mm (6.5 x .860 inches)
• Weight: .35 lb. (160g)