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AT2021 Microphone Sets

Audio-Technica AT2021

Pricing & Availability

  • MSRP: $139


AT2021 Documentation

CardioidAudio-Technica AT2021

Cardioid Pencil Condenser Microphone

The AT2021 is an inexpensive FET condenser mic with a fixed-cardioid polar pattern. It is intended as an all-purpose instrument condenser.

Its “low-mass” diaphragm is said to produce a “superb transient response.”

Its high SPL rating of 145dB (1% THD) makes it suitable for loud sources such as drums. Its relatively high self-noise level of 19dBA would seem to make it unsuitable for very quiet sources, such as nylon-string guitar.

The mic’s frequency response dips -2dB at 80Hz, but is otherwise flat from 30Hz–3kHz. Above 3kHz is a ~4dB peak centered at 10kHz. The HF -3dB ponit is right at 20kHz.

Permalink: Audio-Technica AT2021

The mic was released in 2010.


Frequency Response - CardioidClick Graph to Compare!
AT2021 Cardioid Frequency Response Chart
Pickup Patterns Pads & Filters
Cardioid (11.2 mV/Pa; 30 - 20,000 Hz)
Capsule Dimensions Impedance SPL/Noise
Diameter n/a
250 Ohms (Low) Max SPL: 145 dB
Self-noise: 19.0 dB(A)
Weight Length Max Diameter Interface(s)
83g (2.93oz) 101mm (3.98'') 21mm (0.83'')
  • 3-pin XLR male (1)
Power Specifications
  • Requires phantom power
  • Phantom voltage: 48v

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