Audio-Technica AT4047 User Manual

AT4047

SV

/

CARDIOID
CAPACITOR MICROPHONE

Description

The AT4047/SV is a large-diaphragm, cardioid capacitor micro­phone designed for use in the most demanding applications.
Incorporating a transformer-coupled output and specially-tuned
element, the AT4047/SV provides sonic characteristics reminiscent
of early F.E.T. studio microphone designs, while utilizing modern
design and manufacturing techniques to ensure consistency and
reliability.

The AT4047/SV has a wide dynamic range of 140 dB without
the built-in attenuator, and it accepts up to 149 dB SPL without
capsule or electronic-system distortion above 1% T.H.D. A switch­able 10 dB (nominal) pad is built-in, increasing the SPL capabilities
to 159 dB. These capabilities, coupled with the benefits of excep­tionally low self-noise (9 dB SPL), combine in a versatile micro­phone that excels under the stringent demands of modern digital
recording systems.

The AT4047/SV element utilizes dual, gold-plated and aged,
large diaphragms for extended frequency response. The specially­tuned element improves dynamic range and the ability to handle
high SPLs without sacrificing high-frequency characteristics. Float­ing-construction mounting of the element provides isolation from
noise and vibration.

An integral 80 Hz hi-pass filter provides easy switching from
a flat frequency response to a low-end roll-off. The hi-pass position
reduces the microphone’s sensitivity to “popping” in close v ocal use;
it also reduces the pickup of low-frequency ambient noise (i.e. traffic ,
air-handling systems, etc.) and room reverberation.

The AT4047/SV incorporates a dual-diaphragm configuration
that allows undistorted reproduction of high sound pressure level
signals at all frequencies. The 2-micron-thick, vapor-deposited gold
diaphragms provide accurate reproduction of even the most subtle
sounds, especially high-frequency signals not easily reproduced
by conventional large-diaphragm condenser transducers. For a
warm, true-to-life quality , the dual, large-diaphragm design pro vides
remarkable low-frequency performance.

The diaphragms of every AT4047/SV are aged through five
different steps to assure the optimum characteristics achieved
will remain constant over years of use .

The symmetrical housing assem­bly surrounding the microphone cap­sule and its open acoustical environ­ment allow the off-axis response to be
ideally suited for studio work where
natural reproduction of off-axis sound
is of paramount importance.

The AT4047/SV will operate in
conjunction with any remote “phan­tom” or “simplex” power source sup­plying 48V DC, such as the AC-pow­ered Audio-Technica AT8801 single­channel and CP8506 four-channel
phantom power supplies.

The AT4047/SV includes an
AT8449/SV shock mount to provide
mechanical isolation and secure
mounting. This effective shock mount
fits 5/8"-27 threaded stands. A stand
clamp without shock mount, the
AT8430 (in black only), is available as
an optional accessory.

Architects and Engineers Specifications

The microphone shall be a large-diaphragm capacitor-type
with a cardioid polar pattern and a frequency response of 20 Hz
to 18,000 Hz. It shall operate from an external 48V DC (±4V)
phantom power source. The dual-diaphragm element shall be inter­nally shock mounted.

Nominal open-circuit output voltage shall be 17.7 mV at 1 kHz,
1 Pascal. The microphone shall have an output impedance of
250 ohms and output shall be balanced. The microphone shall
accept a 149 dB SPL at 1 kHz while producing no greater than
1% T .H.D.

The microphone shall have a length of 6.69" (170.0 mm),
a maximum body diameter of 2.10" (53.4 mm), and a weight of

14.5 oz (410 grams). Finish shall be matte silver color. A separate
AT8449/SV shock mount, also with matte silver finish, shall be
included.

The Audio-Technica AT4047/SV is specified.

AT

4047/SV with included

AT

8449/SV shock mount

40 SERIES PRECISION MICROPHONES

AT4047

Specifications

†

SV

/

ELEMENT Externally polarized (DC bias) capacitor
POLAR PATTERN Cardioid (Unidirectional)
FREQUENCY RESPONSE 20 -18,000 Hz
OPEN CIRCUIT SENSITIVITY (1 kHz) –35 dB (17.7 mV) ± 2 dB, re 1V at 1 Pa*
IMPEDANCE 250 ohms
MAXIMUM INPUT SOUND LEVEL 149 dB SPL, 1 kHz at 1% T.H.D.

159 dB SPL, with 10 dB pad (nominal)

NOISE, TYPICAL (A-WEIGHTED)

2

9 dB SPL

DYNAMIC RANGE, TYPICAL 140 dB, 1 kHz at Max SPL
SIGNAL-TO-NOISE RATIO, TYPICAL 85 dB, 1 kHz at 1 Pa*
HI-PASS FILTER (LOW-END ROLL- OFF) 80 Hz, 12 dB/octave
POWER REQUIREMENTS 48V DC phantom (±4V )
CURRENT CONSUMPTION, TYPICAL 3.0 mA
WEIGHT (LESS CABLE AND CLAMP) 14.5 oz (410 grams)
DIMENSIONS 6.69" (170.0 mm) long,

2.10" (53.4 mm) maximum body diameter

ACCESSORIES FURNISHED AT8449/SV shock mount for 5/8"- 27

threaded stands; protectiv e 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/cm2 = 10 microbars = 94 dB SPL

1

Measured at diaphragm

2

Using Audio Precision System One

Optional Accessories:

• AT8137 large cylindrical foam windscreen.

• AT8314 2-conductor, shielded,
vinyl-jacketed, broadcast-type cable with
XLRF-type connector at microphone end,

1

XLRM-type connector at equipment end.
Available in 10', 20', 25', 30', 50' & 100'
lengths.

• AT8430 stand clamp for 5/8"-27
threaded stands.

• CP8506 four-channel 48V phantom
power supply (AC powered).

• AT8801 single-channel 48V phantom
power supply (AC powered).

Audio-Technica microphones and accessories purchased
in the U.S.A. are warranted for one year from date of
purchase by Audio-Technica U.S., Inc. (A.T.U.S.) to be free
of defects in materials and workmanship. In event of such
defect, product will be repaired promptly without charge
or, at our option, replaced with a new product of equal or
superior value if delivered to A.T.U.S. or an Authorized
Service Center, prepaid, together with the sales slip or
other proof of purchase date.

is required for return.

due to normal wear, abuse, shipping damage, or failure to
use product in accordance with instructions. This warranty
is void in the event of unauthorized repair or modification,
or removal or defacing of the product labeling.

For return approval and shipping information,

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

Except to the extent precluded by applicable state law,

A.T.U.S. will have no liability for any consequential,
incidental, or special damages; any warranty of
merchantability or fitness for particular purpose
expires when this warranty expires.

This warranty gives you specific legal rights, and you may
have other rights which vary from state to state.

One-Year Limited Warranty

Prior approval from A.T.U.S.

This warranty excludes defects

contact

Polar Pattern

330°

300°

270°

240°

210°

LEGEND

200 Hz

SCALE IS 5 DECIBELS PER DIVISION

1 kHz
5 kHz
8 kHz

Frequency Response

500

20010050

Frequency in Hertz

LEGEND

12" or more on axis (flat)

Roll-off

Dimensions

0°

30°

60°

90°

120°

150°

180°

2.10"

53.4 mm

6.69"

170.0 mm

Outside the U.S.A., please contact your local dealer for
warranty details.

0.83"

21.0 mm

0.75"

19.0 mm

10 dB

Response in dB

2k

1k

10k

20k

5k

Audio -Technica U.S., Inc., 1221 Commerce Drive, Stow, Ohio 44224
Audio -Technica Limited, Old Lane, Leeds LS11 8AG England

Form No. 0345- 0830-0 0- B/ W P 51178 ©1999 Audio-Technica U.S., Inc. Printed in U.S.A.