The CM-145 is a very low noise, flat frequency response, omni-directional microphone built to IEC651 Type 1 standards and comparable to the B & K 4006. This is an electret condenser microphone with a 1/2″ diaphram of nickel-copper alloy. Included with the microphone is a shock mount, foam lined wood storage box and individual calibration chart.

This microphone is a great match to the high precision capabilities of Studio Six Digital AudioTools.

IEC651 Type 1 refers to a system of the sound level meter as in AudioTools combined with the microphone. For a discussion of Type 1, see this link towards the bottom.



  • Diaphragm Type: 1/2″ fine grained nickel-copper alloy compliant to IEC651 Type 1
  • Frequency Response: 20Hz – 20kHz ±2dB
  • Polar Pattern: Omnidirectional
  • Maximum SPL: 146 dB SPL
  • Impedance: 100Ω ± 30% at 1kHz
  • Equivalent noise level: 17 dBA
  • Phantom Power: 9 – 52Vdc
  • Output Level: 100mV/Pa
  • Connector: 3 pin XLR, pin 2 positive
IN THE BOX: CM-145, Shock Mount, Foam-lined Wood Storage Box, Calibration Chart

Pin It on Pinterest