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Audio-Technica ATM73a

Pricing & Availability

  • MSRP: $280
  • Discontinued


ATM73a Documentation

CardioidAudio-Technica ATM73a

Cardioid Condenser Microphone

The ATM73 is a headworn electret microphone, designed for performers who need hands-free operation.

The mic’s power supply can be clipped to a belt. It is powered via a single AA/UM3 battery, or Phantom power.

The mic includes its dedicated power supply (A-T p/n AT8531), a foam windscreen (p/n AT8128), and an AA battery.

The ATM73a is available in multiple versions:

  • ATM73cW - omits the power supply in favor of cabling compatible with Audio-Technica’s UniPak wireless transmitter system.
  • ATM73ac - omits the power supply (presumably made available as a replacement option for expired headsets?)

The Audio-Technica ATM73a is also known as: ATM73ac, ATM73cW.


Frequency Response - CardioidClick Graph to Compare!
ATM73a Cardioid Frequency Response Chart
Pickup Patterns Pads & Filters
Cardioid (1.7 mV/Pa; 40 - 15,000 Hz)
  • Filter: HPF: -18dB/octave @ 80Hz (Via Switch)
Capsule Dimensions Impedance SPL/Noise
Diameter n/a
200 Ohms (Low) Max SPL: 135 dB
Self-noise: 35.0 dB(A)
Weight Length Max Diameter Interface(s)
31g (1.09oz) n/a n/a
  • 3-pin XLR male (1)
Power Specifications
  • Requires phantom power
  • Has battery compartment (1.5V AA/UM3)
  • Phantom voltage: 11-52v

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