AKG C4000 Bedienungsanleitung

10 C4000

Table of Contents

1Description .......................................................................................11

2Application .......................................................................................12

3Powering ..........................................................................................13

4Cleaning ...........................................................................................15

Microphone........................................................................................15

Windscreen........................................................................................15

5Standard Accessories.......................................................................15

6Optional Accessories........................................................................15

7Specifications...................................................................................16

Frequency Response Curves................................................................17

Polar Patterns.....................................................................................17

Table of Contents

20120403_BDA C4000 (5018378)_PRINT.pdf Release 1.0

C4000 11

Description

This large-diaphragm condenser microphone has been designed on the basis

of experience AKG and its customers have gained worldwide over the last

decades using models such as the C12, C414 B, and C3000. The C4000 uses

advanced, reliable components to meet the highest professional demands and

withstand even long-time, tough handling in the studio.

The C4000 provides the following features:

The dual-diaphragm transducer is a proven design that provides different

selectable polar patterns.

The diaphragms are made of a plastic foil that is gold-sputtered on one side

and prevents local shorts to the back electrode even at extremely high sound

pressure levels.

A switchable preattenuation pad allows you to increase the maximum SPL

capability of your C4000 by 10 dB for distortion-free close-in recordings.

Many mixing console input stages use small transformers that are susceptible

to overload, particularly at low frequencies. The C4000’s pad prevents such

overload.

A bass cut filter that is switchable on the microphone body reduces lowend

distortion due to uncontrolled rumble or wind noise even further. The filter has

a 12 dB/octave slope starting at 100 Hz.

The all-metal die-cast body shields the microphone very effectively against

RF interference when using it near radio transmitters or together with wireless

microphones or other communication systems.

With its high SPL capability, minimum distortion, and resistance to extreme

temperatures and high humidity, the C4000 is a truly universal microphone. A

recessed switch on the microphone body allows you to select three different

polar patterns for a wide range of recording situations. Each of these polar

patterns is virtually frequency independent so that reflected sound, too will be

reproduced accurately and uncolored.

1Description

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12 C4000

Application

Most engineers use the cardioid polar pattern (center position of the polar

pattern selector) for most applications. It is a standard setting for recording and

gives excellent results on all kinds of voices and a wide range of instruments.

If you need to mic up closely spaced instruments separately, you want higher

channel separation. Therefore, set the polar pattern selector to the right-hand

position for the hypercardioid polar pattern. This pattern is a very good choice

for concert sound applications because it rejects most of the regenerated

signals arriving at the microphone from the monitor loudspeakers that are

usually placed a little to the sides of the artist.

Set the polar pattern selector to omnidirectional (left-hand position) for "all

around the mic" recording, high quality ambience (audience sound) miking, or

far-field recording in exceptionally good large or small recording rooms, etc.

Although the microphone capsule is shock mounted internally, you can use the

supplied H85 "spider" suspension to reduce vibrational noise from the stand

or other sources even further. Remember to insert the cable into one of the two

grooves at the rear end of the outer ring for strain relief. This removes

mechanical pull from the connector and reduces vibrational noise that may be

transmitted to the microphone by the cable.

You can use the supplied W4000 foam windscreen both as a windscreen for

outdoor recording and as an additional pop screen for vocal recording. The

wind/pop screen causes almost no change in the frequency response of the

microphone. A careful, subjective comparative listening test will be the best

way to decide whether to use the windscreen or not.

2Application

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C4000 13

Powering

The C4000 operates on any phantom power source to IEC 61938. This

standard specifies a positive voltage of 12, 24 or 48 VDC on both audio wires

referenced to the cable shield. Alternatively, you can operate the microphone

on any DC voltage between 9 and 52 V fed to the microphone via standard

phantom power circuitry.

Adding Phantom Power to Balanced Input Stages

Input transformer with center tap (floating).

Input transformer with no center tap (floating).

Standard values for Rv or 2 x Rv:

2 x RV

12 V ±2 V

330 ohms

680 ohms

24 V ±2 V

680 ohms

1200 ohms

48 V ±4 V

3300 ohms 6800 ohms

3Powering

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14 C4000

Powering

In order to preserve symmetry, use 2 x Rv resistors with a maximum tolerance

of 0.5% only.

If the amplifier inputs are single-ended (grounded) or have no input

transformers, wire either capacitors or optional transformers into the audio

lines to prevent any current leakage into the input stage.

Adding Phantom Power to Unbalanced Amplifier Inputs

20120403_BDA C4000 (5018378)_PRINT.pdf Release 1.0

C4000 15

Cleaning

Use a soft cloth moistened with water to clean the surface of the

microphone body.

Wash the foam windscreen in soap suds. Do not use the windscreen before

it has dried completely.

H85 shock mount

W4000 foam windscreen

For optional accessories, refer to the current AKG catalog or folder, or visit

www.akg.com. Your dealer will be glad to help.

4Cleaning

Microphone

Windscreen

5Standard Accessories

6Optional Accessories

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16 C4000

Specifications

Type: 1-inch dual diaphragm pressure gradient microphone

Polar patterns: omnidirectional, cardioid, hypercardioid

Sensitivity at 1000 Hz: 25 mV/Pa

(

-32 dBV ±2 dB)

Frequency range: 20 to 20,000 Hz (refer to frequency response curves)

Electrical impedance:



200 Ohm

Recommended load impedance:

1.000 Ohm

Bass cut filter slope: 12 dB/octave below 100 Hz

Preattenuation pad: -10 dB, switchable

Equivalent noise level to IEC 60268-4:

22 dB

Equivalent noise level to IEC 60268-4 (

-weighted):

8 dB-

Signal/noise ratio re 1 Pa (

-weighted):

86 dB*)

Max. SPL for 0.5% THD (0/-10 dB):

350/1000 Pa Z

145/155 dB SPL*)

Dynamic range: 137 dB (

-weighted)*)

Environment: -

temperature:

- relative humidity:

-10°C to +60°C -

(14°F to 140°F)

90% (+20°C/68°F), 85% (+60°C/140°F)

Power requirement: 9 to 52 V phantom power to IEC 61938

Current consumption:



2 mA

Connector pinout: 3-pin male XLR to IEC standard

Size: max. dia.: 58 mm (2.3 in.), length: 183 mm (7.2 in.)

Net weight: 450 g (1 lb.)

*) Values for 48 V phantom power; reduce by 6 dB for 24 V and 18 dB for 12 V phantom power.

This product conforms to the standards listed in the related Declaration of Conformity. To order a free copy of

the Declaration of Conformity for this product, visit http://www.akg.com or contact [email protected].

7Specifications

20120403_BDA C4000 (5018378)_PRINT.pdf Release 1.0

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