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.

Specifications:
Maximum SPL input: 146 dB
Phantom power voltage: 9 - 52 volts
Equivalent noise level: 17 dBA
Impedance: 100 ohms + 30% @ 1 kHz
Output connector: 3 pin XLR male
Output level: 100 mV/Pa
Frequency response: 20 to 20kHz + 2 dB
Polar Pattern: Omnidirectional
Diaphram: 1/2" fine grained
Nickel-Copper alloy
Compliant to IEC651 Type 1