Home Products Transducers Measurement Microphones Measurement Microphone MM 225

Measurement Microphone MM 225

The 1/2 ”measurement microphone MM 225 opens up the possibility of using high quality, pre-polarized measurement microphone capsule MK 255 on measurement systems with phantom power.



For more information on Measurement Microphone MM 225 or to request a quote, contact our team now:


The electrical connection is made via a permanently connected, two-meter-long XLR cable.

We recommend the MH 64 microphone holder with a 1/2 ”clamp to hold the microphone. The use of the 1/2 ”measuring microphone capsule accessories such as windshield, nose cone, dry adapter etc. is possible without any problems.

The measurement microphone can be calibrated with the Pistonfon Type 5002 or with other suitable sound pressure calibrators.

Converter typeCapacitive pressure receiver, according to WS2F (DIN EN IEC 61094-4)
Operating transfer coefficient50 mV / Pa
Operational transmission rate-26 dB ± 1.5 dB re 1V / Pa
Free field correction for 1 kHz0 dB
Diffuse field correction for 1 kHz0 dB
Reference directionMicrophone axis
Frequency range of the free field transmission factor3.5 Hz … 20 kHz, class 1 DIN EN 60 651
Polarization voltage200 V
Limit sound pressure level for 3% harmonic distortion at 1 kHz> 138 dB
Output voltage≤ 7.5 Veff at 1 kHz / 1% THD
Output impedance<100 ohms
Nominal terminating impedance100 kOhm
Start-up time1 min.
Equivalent noise level DIN EN 6065115 dBA
Magnetic field influence 80 A / m, 50 Hz<22 dB
Influence of mechanical vibrations 1 m / s²60 dB (20 Hz to 1 kHz)
Working temperature range ˂ ± 0.5 dB-25 ° C to +100 ° C
Temperature coefficient≤ 0.01 dB / K
Static pressure coefficient1×10-5 dB / Pa
Moisture limitsrH <100%, condensation not allowed
Temperature limits-50 ° C to +100 ° C
diameterwith protective cap13.2 + 0.05 mm
without protective cap12.7 + 0.05 mm
Thread for preamplifier11.7mm 60 US
Thread for protective cap12.7mm 60 US
Memory for microphone identification


Related Products