The Earthworks M23 Gen 2 Measurement Microphone continues the legacy of precision and reliability that made the original M23 a trusted tool in studios, live sound, and system calibration worldwide.

Designed for engineers and acousticians who demand accuracy without compromise, the M23 Gen 2 captures every sonic detail with true-to-source clarity and extended frequency response — making it an essential reference for any acoustic measurement environment. Built with a machined stainless-steel body and IP54-rated durability, the M23 Gen 2 is engineered to perform in the field or the lab. With a flat response from 5 Hz to 23 kHz and an extended high-frequency reach up to 30 kHz, it delivers the accuracy required for real-world acoustic analysis, room tuning, and system alignment. Its omnidirectional polar pattern ensures consistent off-axis response, while ultra-low self-noise and high SPL handling preserve integrity across any dynamic range. Hand-calibrated and manufactured in the USA, the M23 Gen 2 exemplifies Earthworks’ precision engineering at its finest.

Earthworks M23 Gen 2 Measurement Microphone Features

• Second-generation evolution of the classic Earthworks M23 measurement mic
• Ultra-flat frequency response (±1 dB) from 5 Hz to 23 kHz
• Omnidirectional polar pattern ensures uniform spatial accuracy
• Extended frequency reach beyond 30 kHz for detailed high-end response
• Handles extreme SPL levels — up to 140 dB (P48) without audible distortion
• Exceptionally low self-noise of 23 dBA for precise, wide dynamic range measurements
• Precision-matched sensitivity (-40 dBV/Pa, 10 mV/Pa ±2 dB) for consistency across systems
• Rugged stainless-steel housing with IP54 rating for dust and moisture resistance
• Powered by standard P48 (48 V) or P12 (12 V) phantom power
• Ideal for acoustic analysis, room calibration, and loudspeaker alignment applications
• Each unit individually calibrated and includes printed calibration chart

Earthworks M23 Gen 2 Measurement Microphone Specifications

• Microphone Type: Pre-polarized condenser
• Diaphragm Size: 6 mm
• Polar Pattern: Omnidirectional
• Flat Response Range (±1 dB): 5 Hz – 23 kHz
• Frequency Response (-3 dB): ≤ 3 Hz to ≥ 30 kHz
• Sensitivity: -40 dBV/Pa (10 mV/Pa) ±2 dB
• Self-Noise (A-Weighted): 23 dBA
• Maximum SPL (3% THD): 140 dB @ P48 / 133 dB @ P12
• Power Requirements: P48 (7.2 mA) / P12 (5.3 mA) phantom power
• Minimum Load Impedance: 1 kΩ
• IP Rating: IP54 (dust and splash resistant)
• Construction: Machined stainless steel
• Dimensions: 5.5 × 0.86 in (138.6 × 21.8 mm)
• Weight: 0.28 lb (0.13 kg)

Earthworks M23 Gen 2 Measurement Microphone Includes

• Earthworks M23 Gen 2 Measurement Microphone
• MC1 Microphone Clip
• Mic Stand Thread Adapter
• OMW2 Windscreen
• ADP1 Calibrator Adapter
• Calibration Chart (individual performance data)
• Protective Carrying Case
• Manufacturer Warranty