AKG Acoustics C 4000B manual Description, Recommended Applications, Powering

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 C 12, C 414B, and C 3000. The C 4000B uses advanced, reliable components to meet the highest pro- fessional demands and withstand even long-time, tough handling in the studio.

The C 4000B 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 C 4000B by 10 dB for distortion-freeclose-in record- ings. Many mixing console input stages use small transformers that are susceptible to overload, particularly at low frequencies. The C 4000B’s pad prevents such overload.

A bass cut filter that is switchable on the microphone body reduces low- end distortion due to uncontrolled rumble or wind noise even further. The filter has a 12 dB/octave slope starting at 100 Hz.

The all-metaldie-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 C 4000B is a truly universal micro- phone. 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.

Recommended Applications

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 instru- ments.

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 loud- speakers 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 H 85 “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 W 4000 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.

Powering

C 4000B				source to DIN 45	596 /
The C 4000 B operates on any phantompower					VDC
This standard specifies			positive voltage of 12, 24, or 48
IEC 61938.	o	voltage	source to IEC 61938. This
on the two audio lines referenced to the cable shield. Alternatively, you can
standard specifies a positive			of 12, 24, or 48 VDC on both audio

wires referenced to the cable shield. Alternatively, you can operate the microphoneoperate the microphoneon any DC voltageon anybetweenDC voltage9 andbetween52 V fed9 andto the52 microphoneV fed to the viamicrophonestandard viaphantomstandardpowerphantomcircuitrypower. wiring.

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