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AT4050
MULTI-PATTERN CONDENSER MICROPHONE
• Transparent uppers/mids balanced by rich low-end qualities
combine with advanced acoustic engineering for extensive
performance capabilities and highest quality
• Dual-diaphragm capsule design maintains precise polar pattern
definition across the full frequency range of the microphone
• Transformerless circuitry virtually eliminates low-frequency
distortion and provides superior correlation of high-speed
transients
• Open acoustical environment of the symmetrical housing
assembly minimizes unwanted internal reflections
• State-of-the-art surface-mount electronics ensure compliance
with A-T's stringent consistency and reliability standards
The AT4050 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 and 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.
An integral 80 Hz high-pass filter provides easy switching from a flat
frequency response to a low-end roll-off. The high-pass position
reduces the microphone's sensitivity to popping in close vocal use.
It also reduces the pickup of low-frequency ambient noise (such
as traffic, air-handling systems, etc.), room reverberation and
mechanically coupled vibrations.
In use, secure the cable to the mic stand or boom, leaving a slack
loop at the mic. This will ensure the most effective shock isolation
and reduce the possibility of accidentally pulling the microphone out
of its mount.
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.
AT4050 SPECIFICATIONS
†
ELEMENT
POLAR PATTERN
FREQUENCY RESPONSE
LOW FREQUENCY ROLL-OFF
OPEN CIRCUIT SENSITIVITY
IMPEDANCE
MAXIMUM INPUT SOUND LEVEL
NOISE
1
DYNAMIC RANGE (typical)
SIGNAL-TO-NOISE RATIO
1
PHANTOM POWER
REQUIREMENTS
SWITCHES
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 (Cardioid)
0
330
30
300
60
270
90
240
120
210
150
50
180
Polar Pattern (Omni)
0
330
30
300
60
270
90
240
120
210
150
50
100
180
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
200 Hz same as 1 kHz
1 kHz
5 kHz
8 kHz
Polar Pattern (Fig. Eight)
0
330
30
300
60
270
90
240
120
210
150
50
100
180
SCALE IS 5 DECIBELS PER DIVISION
LEGEND
LEGEND
200 Hz
same as 1 kHz
1 kHz
5 kHz
same as 1 kHz
8 kHz
same as 1 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
P51460-EN
©2002 Audio-Technica U.S., Inc.
Externally polarized (DC bias)
condenser
Cardioid, Omnidirectional,
Figure-of-eight
20-18,000 Hz
80 Hz, 12 dB/octave
–36 dB (15.8 mV) re 1V at 1 Pa*
100 ohms
149 dB SPL, 1 kHz at 1% T.H.D.;
159 dB SPL, with 10 dB
pad (nominal)
17 dB SPL
132 dB, 1 kHz at Max SPL
77 dB, 1 kHz at 1 Pa*
48V DC, 4.2 mA typical
Pattern selection; flat, roll-off;
10 dB pad (nominal)
18.0 oz (510 g)
7.40" (188.0 mm) long, 2.10"
(53.4 mm) maximum body
diameter
Integral 3-pin XLRM-type
AT8449 shock mount for
threaded stands; microphone
dust cover; protective carrying
case
Frequency Response (Cardioid)
100
200
500
1k
2k
5k
10k
Frequency Response (Omni)
200
500
1k
2k
5k
10k
Frequency Response (Fig. Eight)
200
500
1k
2k
5k
10k
Frequency in Hertz
12" or more on axis
Roll-off
Printed in U.S.A.
5
/
"-27
8
10 dB
20k
10 dB
20k
10 dB
20k
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