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Neumann AK 20 Microphone Capsule (Figure 8)

  • Product Highlights
  • Figure-8 Polar Pattern
  • Modular Design
  • Use with KM100 & KM100F
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  • Product Highlights
  • Figure-8 Polar Pattern
  • Modular Design
  • Use with KM100 & KM100F

Bidirectional Microphone Capsule Head (Figure 8)


The Neumann AK 20 microphone capsule is part of the KM 100 miniature series microphone systems. The AK 20 features a pressure gradient, single diaphragm transducer with a figure 8 polar pattern. The diaphragm diameter is just 16mm and all sound field components reach the diaphragm directly.

The end result is even frequency response and output levels from 0 to 180 degrees in proximity. The figure 8 polar pattern is effective in stereo MS recording (with an AK 40 or other cardioid mic), ambiance capturing or lectures and conferences with 2 speakers at either ends of the microphone.


  • Figure Eight Pattern
    The pressure gradient element provides a figure eight pattern providing even frequency response and output levels at 0 and 180 degrees.
  • Modular Design
    The capsule is developed for use with the KM100 and KM100F modular power supplies.


  • Transducer: Pressure Gradient Condenser
  • Polar Pattern: Bi-Directional (Figure-8)
  • Frequency Response: 20 Hz - 20 kHz
  • Dynamic Range (Typical): 122.5 dB
  • Signal-to-Noise Ratio:
    68 dB, Related at 1 Pa at 1 kHz (CCIR dB)
    76.5 dB, Related at 1 Pa at 1 kHz (A-Weighted dB)
  • Maximum Input Sound Level:
    140 dB, Less than 0.5% THD (without Preattenuation)
    150 dB, Less than 0.5% THD (with Preattenuation)
  • Power Requirements: Phantom +48v (KM 100 Power Supplies)
  • Output Impedance: 50 Ohms
  • Output Connectors: XLR-3M Type (KM 100 Power Supplies)
  • Pad: Yes, -10 dB Preattenuation
  • Low Frequency Roll-Off: Use KM 100F
  • Dimensions: 4.4 x 0.88" (110 x 22mm) (Length x Diameter)
  • Weight: 3.6 oz. (102 g)

Q & A

AK 20
MFR Part Number
Product Category
Microphone Accessories
Unit of Measure
Shipping Weight
0.50 lbs.
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