Due to the increasing demands on the sound quality of modern acoustics, today it is difficult to imagine the work of an audio engineer without acoustic measurements.
The difference between our M401 and other inexpensive measurement microphones is an individual calibration file. What is it and why is it needed? The fact is that all microphone capsules have nonlinear unevenness from the linear frequency response, and for budget capsules these deviations can reach up to +-10dB.
On the fourth image you can see measurements of 125 ECM8000 microphones as an example. The real frequency response of some acoustics tuned with this mic at some points may differ from the measured one more than 2.5 times. That's too much and is not suitable for sound system which is used for music listening.
All capsules for our M401 measuring microphones are selected according to the maximum frequency response deviation of +-5 dB across the specified frequency range - more than 30% of the series, and that is not bad in itself. Each microphone assembly is then individually calibrated in the 25Hz-23kHz range using a precision microphone with 1/2" 4191 Brüel & Kjær capsule. This calibration file is suitable for any measurement software including Smaart, REW, Arta, LSP Lab, Spectra Lab and others.
The microphone has a durable aluminum body and is coated with wear-resistant powder paint. Its diameter is suitable for use with a standard microphone holder.
