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AT2021
SMALL-DIAPHRAGM CARDIOID
CONDENSER MICROPHONE
• Ideal for acoustic guitar, overheads, piano and group vocals
• Condenser design for studio-quality vocal and instrument
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 single-
channel 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° F (43° C) for extended periods.
Extremely high humidity should also be avoided.
AT2021 SPECIFICATIONS
†
ELEMENT
POLAR PATTERN
FREQUENCY RESPONSE
OPEN CIRCUIT SENSITIVITY
IMPEDANCE
MAXIMUM INPUT SOUND LEVEL
NOISE
1
DYNAMIC RANGE (typical)
SIGNAL-TO-NOISE RATIO
1
PHANTOM POWER
REQUIREMENTS
WEIGHT (less accessories)
DIMENSIONS
OUTPUT CONNECTOR
ACCESSORIES FURNISHED
† 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 /cm
2
= 10 microbars = 94 dB SPL
1
Typical, A-weighted, using Audio Precision System One.
Specifications are subject to change without notice.
Polar Pattern
LEGEND
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
200 Hz
1 kHz
5 kHz
8 kHz
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
www.audio-technica.com
P51753
©2005 Audio-Technica U.S., Inc.
Fixed-charge back plate
permanently polarized condenser
Cardioid
30-20,000 Hz
–39 dB (11.2 mV) re 1V at 1 Pa*
250 ohms
145 dB SPL, 1 kHz at 1% T.H.D.
19 dB SPL
126 dB, 1 kHz at Max SPL
75 dB, 1 kHz at 1 Pa*
48V DC, 2 mA typical
2.9 oz (83 g)
4.00" (101.5 mm) long,
0.83" (21.0 mm) maximum body
diameter
Integral 3-pin XLRM-type
Stand clamp; soft protective pouch
Frequency Response
Frequency in Hertz
12" or more on axis
Printed in China
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