The Earthworks M30 Gen 2 Measurement Microphone sets a new benchmark for precision, consistency, and reliability in acoustic measurement.

Designed for critical analysis, calibration, and system tuning, the M30 Gen 2 delivers a remarkably flat frequency response and fast impulse performance for true-to-source accuracy. Whether used in professional audio analysis, loudspeaker design, room tuning, or environmental acoustics, the M30 Gen 2 captures every detail with laboratory-grade precision. Building on the legacy of the industry-standard M30, the Gen 2 version refines every aspect of performance — extending response from 3 Hz to 40 kHz, reducing self-noise to 23 dBA, and increasing maximum SPL to 140 dB (with P48). Its machined stainless-steel body and IP54 rating ensure durability in any environment, while its omnidirectional, pre-polarized condenser capsule provides consistent on-axis and off-axis accuracy. Hand-tuned and individually calibrated, each M30 Gen 2 is built in the USA to Earthworks’ uncompromising standards.

Earthworks M30 Gen 2 Measurement Microphone Features

• Next-generation version of the renowned Earthworks M30 measurement mic
• Ultra-flat frequency response (±1 dB) from 5 Hz to 30 kHz; usable 3 Hz to 40 kHz
• Omnidirectional polar pattern for uniform and accurate spatial response
• Handles extreme SPL – up to 140 dB (P48) without distortion
• Exceptionally low self-noise of 23 dBA ensures wide dynamic range and clarity
• Precision-matched sensitivity (-40 dBV/Pa, ±2 dB / 10 mV/Pa)
• IP54-rated stainless-steel body provides superior protection and longevity
• Works with standard P48 (48 V) or P12 (12 V) phantom power
• Ideal for system calibration, loudspeaker alignment, and RTA applications
• Individually calibrated and delivered with a printed calibration chart

Earthworks M30 Gen 2 Measurement Microphone Specifications

• Microphone Type: Pre-polarized condenser
• Diaphragm Size: 6 mm
• Polar Pattern: Omnidirectional
• Flat Response Range (±1 dB): 5 Hz – 30 kHz
• Frequency Response (-3 dB): ≤ 3 Hz to ≥ 40 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: 7.0 × 0.86 in (177.8 × 21.8 mm)
• Weight: 0.30 lb (0.14 kg)

Earthworks M30 Gen 2 Measurement Microphone Includes

• Earthworks M30 Gen 2 Microphone
• MC1 Microphone Clip
• Mic Stand Thread Adapter
• ADP1 Calibrator Adapter
• OMW2 Windscreen
• Calibration Chart (certificate of individual calibration)
• Protective Carrying Case
• Manufacturer Warranty