AKG C 391 B Bedienungsanleitung

391 B /

300 B

BEDIENUNGSANLEITUNG.........................................2

Bitte vor Inbetriebnahme des Gerätes lesen!

USER INSTRUCTIONS ............................................12

Please read the manual before using the equipement!

MODE D’EMPLOI ...................................................22

Veuillez lire cette notice avant d’utiliser le système!

ISTRUZIONI PER L’USO..........................................32

Prima di utilizzare l’apparecchio, leggere il manuale!

MODO DE EMPLEO ................................................42

¡Sirvase leer el manual antes de utilizar el equipo!

INSTRUÇÕES DE USO ............................................52

Favor leia este manual antes de usar o equipamento!

Table of Contents

1Safety and Environment ............................................................13

Environment...................................................................................13

2Description...................................................................................14

Introduction....................................................................................14

Scope of supply.............................................................................14

Special features.............................................................................14

Optional accessories.....................................................................15

Summary.......................................................................................16

3Application ...................................................................................17

Introduction....................................................................................17

CK 91 - Cardioid microphone capsule.........................................17

CK 92 - Omnidirectional microphone capsule.............................17

CK 93 - Hypercardioid microphone capsule................................18

CK 94 - Figure-eight microphone capsule...................................18

CK 97C - Miniature cardioid microphone capsule.......................18

CK 98 - Short shotgun capsule ....................................................18

4Cleaning .......................................................................................19

Microphone....................................................................................19

Windscreen....................................................................................19

5Specifications..............................................................................20

12 C 391 B / SE 300 B

Safety and Environment

1Safety and Environment

Risk of damage

Please make sure that the piece of equipment your microphone

will be connected to fulfills the safety regulations in force in your

country and is fitted with a ground lead.

ATTENTION

1) Remove the housing, electronics and cables before scrapping the

equipment and dispose of all components in accordance with local

waste disposal regulations.

Environment

2) The packaging can be recycled. Dispose of the packaging in a

suitable collection system.

C 391 B / SE 300 B 13

Description

2Description

The C 391 B is a complete system that can be adapted in a very

practical and low-cost manner to match the ever-changing

requirements of the recording, broadcasting, sound reinforcement and

film industries. The sound engineer can choose from a range of

microphone modules that can be mixed and matched to create

customised studio-quality microphones for every conceivable

application.

Introduction

xSE 300 B powering/output module

Scope of supply

xCK 91 microphone capsule with frequency-independent, cardioid

polar pattern

xW 90 foam wind guard

xSA 60 universal tripod connector

xRobust design

Special features

xMinimal self noise

xLow power consumption

xExtremely reliable

xLow-impedance capsule connection

xWorks without any problems up to 60°C and 95% relative

humidity

xIntegrated, switchable 10 dB attenuation of gain (see fig.)

xExtremely durable

xTransformerless output stage

xCan by powered by any phantom powering

device that complies with IEC 61938

xLow distortion, even at high sound pressure

levels

xIntegrated bass filter with onset at approx. 100 Hz (see fig.)

14 C 391 B / SE 300 B

Description

Optional accessories A 91: Articulated joint with swivel range of ±90° from the microphone

axis

B 18: Battery power supply for one microphone

H 30: Elastic suspension with very effective insulation

ST 45: Small table tripod

ST 46: Small table tripod for the fitted capsules

ST 305: Large table tripod with circular base and rubber lining to

dampen structure-borne noise

C 391 B / SE 300 B 15

Description

The C 391 B system consists of a universal powering/output module

(SE 300 B), several microphone capsules and readily-interchangeable

accessories to suit all types of application.

Summary

The microphone is virtually unaffected by handling noise due to its

lightweight diaphragm. Additional features include the all-metal

housing, which makes it less susceptible to HF interference, as well as

its trouble-free operation in almost all situations due to its conservative

and reliable design.

The switchable 10 dB attenuation of the output signal is a major benefit

at high sound pressure levels (i.e. high-powered sound sources) and

when the input stages of amplifiers or mixing desks have lower

maximum input levels. If this option was not available, these connected

stages would be overamplified without being able to fully control the

microphone.

The switchable bass cut filter of the microphone also helps to suppress

low-frequency distortion, such as rumble or wind noises, that cannot

be controlled. The filter slope is approx. 12 dB/octave with the corner

frequency (-3 dB point) lying at approx. 75 Hz.

16 C 391 B / SE 300 B

Application

3Application

The capsules are connected to the powering/output module by a

simple bayonet mounting system. This allows the various capsules to

be switched reliably, quickly and easily, even when they cannot be

seen (e.g. in darkened rooms).

Introduction

The capsules and accessories can only be connected to the powering

module in one position. A short, sharp twist to the right (listen out for a

distinct "click") will secure the module in position (see fig.).

The capsule is removed just as easily with a short twist to the left.

Our modules and system accessories are designed for use in a whole

range of user-specific applications. A brief selection of these are listed

below.

CK 91 - Cardioid

microphone capsule

Classic microphone capsule with a cardioid polar pattern. Suitable for

all applications where good sound attenuation (180°) is required.

CK 92 - Omnidirectional

microphone capsule

Microphone with spherical polar pattern for use during live

commentaries or for choir and solo performer recordings in either a

recording or television studio. The capsule has no distance-dependent

frequency curve (proximity effect) - normally an advantage in the

applications mentioned above.

C 391 B / SE 300 B 17

Application

CK 93 - Hypercardioid

microphone capsule

Similar to the CK 91 in design, but acoustically the CK 93 capsule

provides a uniform hypercardioid polar pattern. The result is a higher

front-to-random factor than with cardioid microphone capsules. This

offers the advantage of better side separation in multi-channel

recording work and increased feedback protection in sound

reinforcement applications.

This microphone capsule provides exceptionally good suppression of

off-axis sounds and is consequently well-suited for interviews or

recording dramas. The CK 94 can be used as part of an M/S

combination in conjunction with a second microphone with a cardioid,

hypercardioid or omnidirectional polar pattern.

CK 94 - Figure-eight

microphone capsule

CK 97C - Miniature

cardioid microphone

capsule

This miniature microphone can be used in any situation where the

microphone must be as inconspicuous as possible, or even hidden

completely out of sight. The microphone polar pattern ensures that

recordings are free from overemphasised auditory source width and

that sound reinforcement work can be completed with good feedback

protection.

CK 98 - Short shotgun

capsule

This shotgun capsule represents a good compromise between the tube

length and the resulting directivity. The capsule is best suited for sound

recordings in the film and television industries, as well as for on-stage

and outdoor applications. It can also be used anywhere where clear

separation between individual instruments is needed without additional

acoustic partitions.

18 C 391 B / SE 300 B

Cleaning

4Cleaning

xUse a soft cloth moistened with water to clean the surface of the

microphone body.

Microphone

xWash the foam windscreen in soap suds. Do not use the

windscreen before it has dried completely.

Windscreen

C 391 B / SE 300 B 19

Specifications

5Specifications

Electrical working principle: Condenser microphone, self-polarised

Acoustic working principle: Pressure gradient receiver

Polar pattern: Cardioid

Frequency range: 20 to 20,000 Hz ± 2 dB from nominal

frequency curve

Field open loop gain (sensitivity) at 100 Hz: 10 mV/Pa - 40 dBV in re. to 1V/Pa

Electrical impedance: d200 Ohm

Recommended load impedance: t1000 Ohm

Equivalent sound pressure level acc. to

IEC 60268-4 (A-weighted):

17 dB-A

S/N ratio in re. to 1 Pa (A-weighted): 77 dB

Sound pressure limit: 80 Pa (132 dB) for 1000 Hz

Operating conditions: - Temperature:

-20°C to +60°C

- Relative humidity:

99% (+20°C), 95% (+60°C)

Supply voltage: 9 to 52 V phantom power acc. to IEC 61938

Current consumption: d2 mA

Connector: Type XLR-3 acc. to IEC

External dimensions: 19 mm ø x 147 mm

Weight: approx. 115 g, net

Housing material: Brass

Housing surface: Mat grey

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

the Declaration of Conformity, visit http://www.akg.com or contact sales@akg.com.

20 C 391 B / SE 300 B

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