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Earthworks Audio M23

Measurement Microphone

  • Omnidirectional pattern
  • Frequency range: 9Hz to 23 kHz +-1/-3 dB
  • Sensitivity: 30mV/ Pa
  • Amplifier typ: discrete class A
  • Max. SPL: 142 dB SPL
  • Requires 48V phantom power
  • Dimensions: 165 x 22 mm
  • Weight: 160 g
  • Incl. Microphone clamp and adapter from 5/8" to 3/8"
2 customer ratings:
  • 5
  • 4
  • 3
  • 2
  • 1
5 / 5.0
  • features
  • quality
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2 written ratings
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Excellent measuring microphone!

28.06.2016
I bought this microphone for use together with the Room EQ Wizard (REW), mainly for the development of crossovers. The current microphones of the beginner class did not really convince me. In particular phase sequences did not look so far to me always understandable or meaningful.

I bought the audio interface "Focusrite Scarlett Solo 2nd Gen" for this purpose. For this, there are dedicated ASIO USB drivers and thus also measurements with 96kHz and 24Bit are available and also a loopback as time reference for REW is possible.

Even the first measurements with the M23 convinced me then. At last meaningfully traceable phase sequences of the single chassis and clean superimposition of several chassis. Perhaps it is because of what the manufacturer says with "Omnidirectional polar pattern". The Polar Response on their website looks in any case perfect. Expressed in a simple way:
"Flat frequency response, fast pulse response and exceptional polar characteristics"

The support from the manufacturer is also very good. I received the dedicated calibration files within a day. The frequency response is almost linear from 10Hz to 30kHz, although it is only specified for 23kHz.

The processing is beyond any doubt!

The price is of course high but adequate for the product properties.
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de Automatically translated (Show original)
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Very good measuring microphone

08.01.2017
I use the M23 from Earthworks together with a Sound Devices USB Pre2 and Dirac V2 software for measuring in my home cinema and am very satisfied. I have already used the Audyssey Pro kit and also the Beyerdynamic MM1.
The M23 has the most valuable and heavy version of the three and I am very satisfied with the results. After registering on the Earthworks homepage, the correction file will be sent by e-mail after a short time. The M23 will also be accompanied by an individual frequency recording on paper, which is already very linear. You should only check whether the format of the Earthworks .ecf file matches the format that the measurement program expects.
With the results I am very satisfied and do not regret the issue. It is always said that even inexpensive microphones are sufficient for such spatial correction measurements. I personally stand there on the point that a microphone also contains in critical areas mechanics - capsule and it is very important on precision. In addition, a Class-A microphone preamplifier, which is installed in the M23.
I trust more on precision and it costs now. I am completely satisfied and I can only recommend.
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€569 £509.01
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Offers include 20% British VAT and are valid as long as stocks last. Shipping costs to the U.K. are 10 EUR (approx. £7), free shipping on orders above 199 EUR. Please click here for international Shipping rates. We do not accept liability for typographical errors or inaccurate information of any kind. *RRP = manufacturer's / distributor's recommended retail price in Germany
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