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Part# - AT2021 - Audio Technica - Audio-Technica AT2021 Small Diaphragm Cardioid Condenser Microphone - Item #10301
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Part #: AT2021
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Ideal for acoustic guitar, overheads, piano and group vocals

- Condenser design for studio-quality vocal and instrument applications

- Excellent sensitivity for court room recording applications

- Excels in high-SPL applications

- Extended response for smooth, natural sonic characteristics

- Low-mass element for superb transient response

- Corrosion-resistant gold-plated XLRM-type connector

- Rugged design and construction for reliable performance

- Cardioid polar pattern reduces pickup of sounds from the sides and rear, improving isolation of desired sound source

The AT2021 is intended for use in professional applications where remote power is available. It requires 48V DC phantom power, which may be provided by a mixer or console, or by a separate, in-line source such as the Audio-Technica AT8801 singlechannel or CP8506 four-channel phantom power supplies. Output from the microphone's XLRM-type connector is low impedance (Lo-Z) balanced. The signal appears across Pins 2 and 3; Pin 1 is ground (shield). Output phase is  Pin 2 hot - positive acoustic pressure produces positive voltage at Pin 2. To avoid phase cancellation and poor sound, all mic cables must be wired consistently: Pin 1-to-Pin 1, etc. Avoid leaving the microphone in the open sun or in areas where temperatures exceed 110 degrees F (43 degrees C) for extended periods. Extremely high humidity should also be avoided.


ELEMENT - Fixed-charge back plate permanently polarized condenser



OPEN CIRCUIT SENSITIVITY  39 dB (11.2 mV) re 1V at 1 Pa

IMPEDANCE - 250 ohms

MAXIMUM INPUT SOUND LEVEL - 145 dB SPL, 1 kHz at 1 percent T.H.D.


DYNAMIC RANGE (typical) - 126 dB, 1 kHz at Max SPL

SIGNAL-TO-NOISE RATIO - 75 dB, 1 kHz at 1 Pa


WEIGHT (less accessories) - 2.9 oz (83 g)

DIMENSIONS - 4.00" (101.5 mm) long, 0.83 inches (21.0 mm) maximum body diameter

OUTPUT CONNECTOR - Integral 3-pin XLRM-type

ACCESSORIES FURNISHED - Stand clamp; soft protective pouch

In the interest of standards development, A.T.U.S. offers full details on its test methods to other industry professionals on request.

1 Pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL

1 Typical, A-weighted, using Audio Precision System One.

Specifications are subject to change without notice.


Please see overview for specifications

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The Sound Professionals™, Inc.
3444 Sylon Blvd.
Hainesport, NJ 08036 USA