Earthworks Audio
Earthworks M30
Omnidirectional measurement condenser mic, 3 Hz to 30 kHz, Type 1; for room and PA measurement
Power Phantom 24-48 V.
- Type
- Condenser
- Pattern
- Omni
- Sensitivity
- −29 dBV/Pa
- Among 204 condensers: more output than 95%
- Among 311 mics: more output than 96%
- Self-noise
- 20 dB(A)
- Among 258 condensers: quieter than 23%
- Among 272 mics: quieter than 23%
- Max SPL
- 140 dB SPL
- Among 277 condensers: takes louder sound than 62%
- Among 343 mics: takes louder sound than 56%
- Rated range
- 3 – 30k Hz
vs 75 end-address condensers
More output than 92% of 75 end-address condensers.
Each stripe is one end-address condenser with a published sensitivity, and each bar counts them; further right means more output. This mic is in blue.
vs 104 end-address condensers
Quieter than 19% of 104 end-address condensers.
Each stripe is one end-address condenser with a published self-noise, and each bar counts them; further right means quieter. This mic is in blue.
vs 110 end-address condensers
Takes louder sound than 64% of 110 end-address condensers.
Each stripe is one end-address condenser with a published max SPL, and each bar counts them; further right means it takes louder sound. This mic is in blue.
Proximity effect: the bass it gains up close
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
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.
In practice
All specs
| From the spec sheet | ||
|---|---|---|
| Max SPL | 140 dB SPL"Max Acoustic Input 140dB SPL". | p. 2 |
| Rated load impedance | 600 ohmminimum, between pins 2 and 3. "Min Output Load 600Ω between pins 2 & 3". | |
| Rated frequency range | 3 Hz to 30 kHz+1/-3 dB. "3Hz to 30kHz ± 1/-3dB"; the product page and user guide give "3Hz to 30kHz" alone. | |
| Powering | phantom 24-48 V"24-48V Phantom, 10mA". | |
| Current draw | 10 mA | |
| Connector | XLR-3 male (pin 2 hot)"XLR-3 (pin 2+)". | |
| Weight | 227 galso 225, product page and user guide. "0.5 lb. (227g)"; the product page and user guide say ".5 lb. (225g)". | |
| Dimensions | 229 × 22 mmLength x diameter: "9 x .860 in. (229 x 22 mm)". | |
| Standards | Meets 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) | |
| Humidity | Up to 90% | |
| Matching | Any number of mics can be matched for a nominal fee | p. 1 |
| ApplicationsEarthworks | SMAART, MLSSA, Spectrafoo, TEF, RTA and all "audio band" measurements; PA alignment and loudspeaker design | p. 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-noise | 20 dB(A)"20dB SPL equivalent (A weighted)"; the data sheet gives "20dB SPL" without a weighting. | |
| Output impedance | 65 ohmbalanced, between pins 2 and 3. "65Ω balanced (between pins 2 & 3)". | |
| From the user guide | ||
| Supplied accessories | microphone 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 |
| Calibration | Calibrated 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 File | p. 3 |
Documents
- M30 Measurement Microphonedata sheet V1
- M30 Measurement Microphoneuser guide, May 2022
- M30 - 30kHz Measurement Microphone | Earthworks Audioproduct page
- M30 frequency response graphproduct page image, 2022
- M series polar pattern graphproduct page image, 2022
Copies kept by Mic Archive (manufacturers move and drop their documents), unchanged, with their original addresses. Each is © its publisher.