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OmnidirectionalCardioidAdvanced Audio Microphones CM-47 fet

Multi-Pattern Condenser Microphone

The CM-47 fet is a dual-pattern FET condenser named for the Neumann U47 FET.

Unlike its namesake, the CM-47 fet uses a K67 capsule with high-frequency deemphasis circuitry. This makes the mic somewhat more like the U87 than the Fet 47.

Advanced Audio AK47Advanced Audio sells an enhanced version of the mic, called the CM-47/CE, that uses a K47-type capsule called the AK-47. It is a 32mm OD design, with a single brass backplate and the K47’s characteristic drilling pattern.

The Class-A FET amplifier circuit in both the CM-47 and CM-47/CE is coupled into a transformer balanced output.

The mic pattern is switchable, from Cardioid to Omnidirectional.

Two other switches on the mic body optionally engage a -10dB pad and a 100Hz low-frequency rolloff.

The mic ships with an elastic shockmount and an aluminum flightcase.

The Advanced Audio Microphones CM-47 fet is also known as: CM-47 FET.


Pickup Patterns Pads & Filters
Omnidirectional (25 - 20,000 Hz)
Cardioid (25 - 20,000 Hz)
  • Pad: -10 dB (Via Switch)
  • Filter: LF Rolloff 100Hz (Via Switch)
Capsule Dimensions Impedance SPL/Noise
Diaphragm diameter: 26mm
Capsule diameter: 32mm
Diaphragm gauge: 6 microns
200 Ohms (Low) Max SPL: 135 dB
Self-noise: 17.0 dB(A)
Weight Length Max Diameter Interface(s)
n/a n/a n/a
  • 3-pin XLR male (1)
Power Specifications
  • Requires phantom power
  • Phantom voltage: 48v

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