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Audix ADX-20i

Pricing & Availability

  • MSRP: n/a


ADX-20i Documentation

CardioidAudix ADX-20i

Cardioid Condenser Microphone

The Audix ADX20i is a miniature electret condenser microphone designed to be clipped on to the bell of a saxophone or other brass instrument.

The mic’s frequency response is heavily sculpted; it is flat ±1dB from 1kHz–4kHz, with a smooth rolloff to -10dB at 40Hz on the low side, and a +5dB peak at 8kHz on the high side. The measurement distance is not specified; if taken at 1m (as is standard), then the actual use within 6 inches of the horn bell would produce a much flatter, fuller low-frequency response than is suggested by the published graph. At a distance, this mic would sound very bright and thin.

There are a few variations of the ADX20i available:

  • ADX-20i: wireless version for use with RAD360 bodypack.
  • ADX-20i-P: phantom powered, includes APS-910 battery/phantom preamp
  • ADX-20iP-HC: Hypercardioid, phantom version.

A 6ft cable is permanently attached, terminating with a mini-XLR-F connector.

The mic ships with a gooseneck clip with integral shockmount (model MC-20i), WS-20 External foam windscreen, and P1 Carrying pouch.

The Audix ADX-20i is also known as: ADX20iP-HC, ADX20iP, ADX20i.


Pickup Patterns Pads & Filters
Cardioid (5.8 mV/Pa; 40 - 20,000 Hz)
Capsule Dimensions Impedance SPL/Noise
Diameter n/a
250 Ohms (Low) Max SPL: 135 dB
Self-noise: 29.0 dB(A)
Weight Length Max Diameter Interface(s)
48g (1.69oz) 29mm (1.14'') 12mm (0.47'')
  • 3-pin XLR male (1)
Power Specifications
  • Requires phantom power
  • Phantom voltage: 9-52v

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