AKG Acoustics C 4000B User Manual

C 4000 B

Condenser Microphone

Description

The C 4000 B was engineered from the ground up to take
advantage of developments in low noise surface mount
circuitry and electret technology to produce a microphone
with an astounding dynamic range of 137 dB. The
microphone’s noise floor is a low value of 8 dB-A, and it
reaches a reference value of 0.5% THD at a level of 145 dB.

The capsule assembly has been internally shock mounted,
and the grid/screen structure is 0.2 inch (3 mm) thick to
reduce wind and breath “pops” with minimal effect on high
frequency performance. The diaphragm assembly is the
industry’s first back plate electret dual 1 inch (25 mm)
diameter design, and it reflects recent developments in
electret technology that assure both long-term stability and
very high equivalent dc voltage biasing.

The C 4000 B reflects AKG’s customary attention to
subtleties of frequency response: the transformerless output
gives rock solid low frequency performance, and the 6 micron
thick gold-sputtered diaphragms provide extended high
frequency performance. Switchable 10-dB padding extends
the operating range even more, and a 12-dB/octave low cut
at 100 Hz removes rumble or excessive proximity effect.

While the C 4000 B is primarily intended for studio use, it
will be equally at home in broadcast operations or on stage
for vocal applications of the highest quality. Polar patterns
are omnidirectional, cardioid, and hypercardioid.

Features

• Noise floor of 8 dB(A) and
maximum level capability of 145 dB

• Uses the first 1-inch dual
diaphragm electret capsule in the
industry

• Three selectable polar patterns
(omni, cardioid and hypercardioid)

• Operates with phantom powering
from 9-52 volts

• Integrated wind and pop screen,
plus internal shock mounting, for
lowest environmental noise
performance

Specifications

Transducer type: Dual diaphragm, 1 in. (25 mm) diameter

pressure gradient

Diaphragm material: Gold-sputtered mylar foil

Frequency response: 20 Hz - 20 kHz

Polar patterns : Omnidirectional, cardioid and hypercardioid

Impedance: Less than 200 ohms

Recommended load impedance: Greater than 1000 ohms

Output connector: XLR (pin 2 positive, per IEC standard)

Sensitivity at 1 kHz: 25 mV/Pa; -32 dB (dB re 1 V/Pa)

Equivalent noise level (A-weighted): 8 dB (DIN 45412)

Sound pressure level for 0.5% THD (0/-10 dB):

145/155 dB SPL (350/1000 Pa)

Dynamic Range: 137 dB

S/N ratio re 1 Pa (A-weighted): 86 dB

Environment:

Temperature: 14° F to 140° F (-10° C to +60° C)

Relative humidity: 90% (-20° C),85% (+60° C)

Pre-attenuation switch: -10 dB

Low frequency roll-off: 12 dB/octave below 100 Hz

Power requirement: 9 to 52 V phantom power

Current consumption: less than 2 mA

Microphone size: 2.2 in. (58 mm dia), 7.2 in. long (183 mm)

Microphone net weight:16 oz. (0.45 kg)

Standard accessories: H 100 Elastic suspension

W 4000 Foam windscreen

H 100

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Limited Warranty

Valid only in the United States. AKG Acoustics warrants AKG products against defects in material
or workmanship for a period of three years from the date of original purchase for use, and agrees
to repair or, at our option, replace any defective unit without charge for either parts or labor.
Important: This warranty does not cover damage resulting from accident, misuse or abuse, lack of
reasonable care, the affixing of any attachment not provided with the product, loss of parts or
connecting the product to any but the specified receptacles. This warranty is void unless service
or repairs are performed by an authorized service center. No responsibility is assumed for any

special, incidental or consequential damages. However, the limitation of any right or remedy shall
not be effective where such is prohibited or restricted by law. Simply take or ship your AKG product
prepaid to our service department. Be sure to include your sales slip as proof of purchase date.
(We will not repair transit damage under the no-charge terms of this warranty.) Note: No other
warranty, written or oral is authorized by AKG Acoustics, Inc. This warranty gives you specific legal
rights, and you may also have other rights which vary from state to state. Some states do not allow
the exclusion or limitation of incidental or consequential damages or limitation on how long an
implied warranty lasts, so the above exclusions and limitation may not apply to you.

Specifications subject to change without notice.

AKG Acoustics GmbH

Lemböckgasse 21–25, P.O.B. 158, A-1230
Vienna/AUSTRIA
Tel: [phone]*, Fax: [phone]
Internet: http://www.akg.com

AKG Acoustics; A Division of Harman Pro Germany
Bodenseestraße 228, D-81243 München/GERMANY
Tel: [phone], Fax: [phone]

Arbiter Pro Audio

Wilberforce Road, London NW9 6AX/ENGLAND
Tel: [phone], Fax: [phone]

AKG ACOUSTICS, U.S.

914 Airpark Center Drive
Nashville, TN 37217, U.S.A.
Tel: [phone], Fax: [phone]

Studer Japan Ltd.

2-43-7, Uehara, Shibuya-ku, Tokyo 151-0064/JAPAN
Tel: [phone], Fax: [phone]

Erikson Pro Audio

620 McCaffrey, St-Laurent, Quebec, H4T 1N1, CANADA
Tel: [phone], Fax: [phone]
Internet: www.jam-ind.com/eriksonpro

AKG is constantly improving and modifying its products, therefore, specifications are subject to change without notice.

The microphone shall be a condenser type with dual diaphragm
construction and switchable omnidirectional, cardioid and
hypercardioid polar patterns. The diaphragm material shall be
gold-sputtered mylar foil, and the on-axis sensitivity shall be
uniform for all patterns, and no less than 25 mV/Pa. The inherent
noise floor of the microphone shall be no greater than 8 dB (A­weighted), and the operating sound field for 0.5% THD shall be

no less than 145 dB and the microphone size shall be no greater
than 2.2 inches in diameter and 7.20 inches in length, and the
microphone weight shall be no greater than 14.5 ounces. A spider
suspension shock mount (H 100) shall be included as a standard
accessory. The microphone shall operate over the entire range of
phantom powering from 9 to 52 volts. The microphone shall be the
AKG Acoustics Model C 4000 B.

Graphical Data

Architects and Engineers Specifications

DS-C 4000 B

Omnidirectional

Cardioid

Hypercardioid