• 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
• 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.
Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio-Technica Limited, Old Lane, Leeds LS11 8AG England
P51460-EN ©2002 Audio-Technica U.S., Inc. Printed in U.S.A.
MULTI-PATTERN CONDENSER MICROPHONE
ELEMENT Externally polarized (DC bias)
POLAR PATTERN Cardioid, Omnidirectional,
FREQUENCY RESPONSE 20-18,000 Hz
LOW FREQUENCY ROLL-OFF 80 Hz, 12 dB/octave
OPEN CIRCUIT SENSITIVITY –36 dB (15.8 mV) re 1V at 1 Pa*
IMPEDANCE 100 ohms
MAXIMUM INPUT SOUND LEVEL 149 dB SPL, 1 kHz at 1%T.H.D.;
159 dB SPL, with 10 dB
17 dB SPL
DYNAMIC RANGE (typical) 132 dB, 1 kHz at Max SPL
77 dB, 1 kHz at 1 Pa*
PHANTOM POWER 48V DC, 4.2 mA typical
SWITCHES Pattern selection; flat, roll-off;
10 dB pad (nominal)
WEIGHT (less accessories) 18.0 oz (510 g)
DIMENSIONS 7.40" (188.0 mm) long, 2.10"
(53.4 mm) maximum body
OUTPUT CONNECTOR Integral 3-pin XLRM-type
ACCESSORIES FURNISHED AT8449 shock mount for
threaded stands; microphone
dust cover; protective carrying
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
= 10 microbars = 94 dB SPL
Typical, A-weighted, using Audio Precision System One.
Specifications are subject to change without notice.