Mic Archive
Earthworks M30
Photo: Earthworks, from its user guide, p. 1.

Earthworks Audio

Earthworks M30

Omnidirectional measurement condenser mic, 3 Hz to 30 kHz, Type 1; for room and PA measurement

Type
Condenser
Pattern
Omni
Sensitivity
−29 dBV/Pa
Self-noise
20 dB(A)
Max SPL
140 dB SPL
Impedance
65 Ω
Rated range
3 – 30k Hz

Frequency response

Angle
Distance

Frequency response: from the graph response, p. 1. Graph on the product page ("M30-Frequency-Response-2022"), relative dB, 20 Hz to 100 kHz shown. Distance, room and smoothing not stated (the data sheet's small version is labelled "12 inches").

Dashed: outside the rated range, or simulated (other angles and distances). Hover or tap the graphs for values.

Polar pattern

Polar pattern: from the graph polar, p. 1. Image "M-Series-Polar-Pattern-2022" on the M30 product page (the file name says M series); each frequency drawn on one side only (1 and 5 kHz left, 10 and 20 kHz right), taken as symmetric. Measuring conditions not stated.

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All specs

From the spec sheet
Max SPL140 dB SPL. "Max Acoustic Input 140dB SPL".p. 2
Rated load impedance600 ohm, minimum, between pins 2 and 3. "Min Output Load 600Ω between pins 2 & 3".
Rated frequency range3 Hz to 30 kHz, +1/-3 dB. "3Hz to 30kHz ± 1/-3dB"; the product page and user guide give "3Hz to 30kHz" alone.
Poweringphantom 24-48 V. "24-48V Phantom, 10mA".
Current draw10 mA
ConnectorXLR-3 male (pin 2 hot). "XLR-3 (pin 2+)".
Weight227 g; also 225, product page and user guide. "0.5 lb. (227g)"; the product page and user guide say ".5 lb. (225g)".
Dimensions229 × 22 mm. Length x diameter: "9 x .860 in. (229 x 22 mm)".
StandardsMeets or exceeds Type 1 and applicable IEC 61094 requirements
Operating temperature-20 to +60 °C (-4 to 140 °F)
Storage temperature-40 to +80 °C (-40 to 176 °F)
HumidityUp to 90%
MatchingAny number of mics can be matched for a nominal feep. 1
Applications (Earthworks)SMAART, MLSSA, Spectrafoo, TEF, RTA and all "audio band" measurements; PA alignment and loudspeaker designp. 2
From the product page
Sensitivity−29 dBV/Pa (34 mV/Pa), typical. "34mV/Pa (-29dBV/Pa)" (20·log10(0.034) = -29.4).p. 1
Self-noise20 dB(A). "20dB SPL equivalent (A weighted)"; the data sheet gives "20dB SPL" without a weighting.
Output impedance65 ohm, balanced, between pins 2 and 3. "65Ω balanced (between pins 2 & 3)".
From the user guide
Supplied accessoriesmicrophone clip; calibration adapter; calibration chart. "Your purchase includes": the M30, a microphone clip, a calibration adapter, a calibration chart, and a frequency response data sheet available on registering.p. 2
CalibrationCalibrated at the factory at 1 kHz; re-calibration recommended every five years; each mic comes with its own printed response chart and a downloadable Electronic Calibration Filep. 3

Documents

Copies kept by Mic Archive, because manufacturers move and drop their documents. Each is © Earthworks Audio, unchanged, with its original address.

Product page on earthworksaudio.comRecording Hacks

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