Audio Technica AT4071a Specifications

1 kHz
400 Hz
200 Hz

LEGEND LEGEND

2 kHz

4 kHz

8 kHz

Polar Pattern

SCALE IS 5 DECIBELS PER DIVISION

90

60

120

30

150

210

240

270

300

330

180

0

LEGEND

Roll-off

12" or more on axis (flat)

Frequency in Hertz

Response in dB

10 dB

20k

10k

5k

2k

1k

500

200100

50

Frequency Response

AT4071a LINE + GRADIENT CONDENSER MICROPHONE

• Designed for critical long-distance pickup in broadcasting, film/TV
production, and theater sound reinforcement applications

• Direct-coupled, balanced output ensures a clean signal even in
high-output conditions

• Exclusive acoustic design provides same directivity as mics up to
50% longer (U.S. Patent No. 4,789,044)

• Rugged housing made of lightweight structural-grade aluminum
alloy

• Switchable low-frequency roll-off

AT4071a SPECIFICATIONS

†

ELEMENT Externally polarized (DC bias)

condenser

POLAR PATTERN Line + gradient

FREQUENCY RESPONSE 30-20,000 Hz

LOW-FREQUENCY ROLL-OFF 150 Hz, 12 dB/octave

OPEN CIRCUIT SENSITIVITY

1

–21 dB (89.1 mV) re 1V at 1 Pa*

IMPEDANCE 100 ohms

MAXIMUM INPUT SOUND LEVEL 124 dB SPL, 1 kHz at 1% T.H.D.

2

NOISE

12 dB SPL

DYNAMIC RANGE (typical) 112 dB, 1 kHz at Max SPL

SIGNAL-TO-NOISE RATIO

2

82 dB, 1 kHz at 1 Pa*

PHANTOM POWER 11-52V DC, 3.2 mA typical
REQUIREMENTS

SWITCH Flat, roll-off

WEIGHT (less accessories) 5.5 oz (155 g)

DIMENSIONS 15.55" (395.0 mm) long,

0.83" (21.0 mm) body diameter

ACCESSORIES FURNISHED AT8405a stand clamp for 5/8"-27

threaded stands; AT8135
windscreen; protective
carrying case

†

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

1

Measured at diaphragm

2

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

Specifications are subject to change without notice.

2

= 10 microbars = 94 dB SPL

The AT4071a is intended for use in professional applications where
remote power is available. It requires 11V to 52V 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.

An integral 150 Hz high-pass filter provides easy switching from a flat
frequency response to a low-end roll-off. The roll-off position
reduces the pic

, air-handling systems

affic

as tr

kup of lo

mechanically coupled vibr

w-frequency ambient noise (such

erber

, etc.), room re

v

ations.

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.

ation and

Audio-Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224

echnica Limited,

Audi

T

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o

Old Lane, Leeds L

1 8AG England

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www.audio-technica.com

P51663-EN ©2004 Audio-Technica U.S., Inc. Printed in Japan