Microphone Cartridges

4189 1/2-Inch Free-Field Microphone

4189 1/2-Inch Free-Field Microphone

A general-purpose workhorse designed for high-precision, free-field measurements with high sensitivity. Our best-selling microphone for 15 years because it produces the best results in its class, and will keep doing so for decades to come, with both CCLD and classical preamplifiers.

Universally useful in almost every measurement scenario, it is especially well suited for battery operated equipment – which is why it is fitted as standard to some of our world-leading sound level meters. Our best-seller for typical electro-acoustic measurements like loudspeaker and microphone measurements, because it has earned our customers’ trust over many years.


  • Precision sound measurement
  • Premium class sound level meters
  • Equipment complying with IEC 61672 class 1

Capacitance: 14 pF
Diameter: ½
Dynamic range: 14.6 – 146 dB
Frequency range: 6.3 – 20000 Hz
Inherent noise: 14.6 dB A
Lower limiting frequency -3dB: 4 Hz
Optimised: Free field
Polarization: Prepolarized
Polarization voltages: V
Pressure coefficient: -0.01 dB/kPa
Sensitivity: 50 mV/Pa
Temperature coefficient: -0.006 db/ºC
Temperature range: -30 – 150 C
Venting: Rear
Weight: gram
Sound field: Free-field
Microphone type: Free field