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Advanced Audio CM414 FET Condenser Microphone

Large dual-diaphragm, 3-pattern FET condenser microphone based on the early AKG C414eb
MFR# CM414

Product Description

The Advanced Audio CM414 is a large dual-diaphragm, 3-pattern fet microphone based on the early AKG C414eb. The CM414 response is very smooth up to 8 kHz, then rises to about 4 dB at 15 kHz, adding an “airy” quality to the sound. The CM414 has a more present sound than the later AKG C414/P48.

The Advanced Audio CM414 features a 34mm capsule with 6-micron-thick German mylar diaphragms. This capsule is very accurate and has a smooth frequency response that matches within 1.5 dB, the response of the capsules used in the AKG C12 and early C414eb microphones. This is the same capsule used in Advanced's popular CM12se tube microphone.

The CM414 uses a two-stage Class A FET circuit similar to the one found in the original C414. The FET is buffered by a discrete transistor then coupled into the output transformer, a strategy superior to the single-FET method used in the Neumann U87. This increases the overall headroom by 14 dB making it ideal for capturing drum, percussion & grand piano. The CM414 has a -10 dB pad, a low-frequency roll-off switch, and 3-way pattern switch on the body.


  • 34mm dual back-plate with 6-micron German mylar skinned dual diaphragm
  • Class A discrete transformer coupled circuit
  • 3 selectable pick-up patterns - omni, cardioid, and figure-8
  • Standard 48V phantom power requirement
  • Frequency response: 20 Hz to 20 kHz ±3 dB
  • Noise: <12dB (A-weighted)
  • Impedance: <200 ohms (load impedance <1.2K)
  • Distortion: 0.5% @125 dB (135 dB with -10 dB pad)
  • Maximum output > than +14 dBu with less than 0.5% distortion
  • 75-80 Hz low-frequency roll-off switch
  • Heavy duty shock mount
  • Aluminum road case

Product Specifications

Condition New
Package Contents CM414 mic, shock mount, and aluminum road case
Tube or Solid State Solid State
Transducer Type Condenser
Polar Pattern Bi-Directional / Figure-Eight, Cardioid, Omni-Directional
Number of Microphones Single Microphone
Impedance <200 Ohms (load impedance <1.2 kOhms)
Frequency Range 20 Hz - 20 kHz (±3 dB)
input_pad -10 dB
Filters 75/80 Hz low-frequency roll-off switch

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In almost 20 years in Pro audio buying, never did I receive a unit so well packed and exactly as described. Works flawlessly. The whole process has been so smooth. I will never hesitate to do business with you guys in the future and will recommend you to everyone I know.
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