Crest Audio X-Four Bedienungsanleitung

owners manual

X-Four mixing console

X-Four owner’s manual

block diagram

OFF

1 3

SOLO

OFF

SOLO

AUDIO

MONITOR OUT

SOURCE SELECT

POST / PRE FADER

FROM

SOLO

LOGIC

SCL+

LEVEL

X-Four Block Diagram

SCL-

+10

PEAK

LO MID

+10

group p. 41

master p. 57

power supply p. 81

stereo inputs p. 25

mono inputs p. 7

table of contents

X-Four owner’s manual

how to use this manual

conventions

terms

indicators or controls employed on the X-Four console

will appear as: TERMS

tasks

are broken down into steps 1

warnings

indicators

tips

see

see—references other sections of the manual containing

supplementary information on the current topic or a related issue

Prefered methods.

Helpful hints.

Feature insights.

Procedures not to attempt.

Issues or hazards to keep

in mind when operating

the equipment.

What to look

for on-screen.

Alerts, indicators, or

prompts that may appear.

p. 6

X-Four owner’s manual

mono input module

module panel

legend

block diagram

p. 7

mono input module

features

phantom power—+48V

48 volts DC is applied to pins 2 and 3 on the mic-input XLR con-

nector. This option is used with condenser microphones and active direct

boxes that require an external DC voltage (phantom power) in order to

operate.

pad

The mic-input signal is attenuated by 15dB to prevent some signals

(e.g. kick drum or lead vocal) from overloading the preamp stage.The pad

is used to bring a hot mic-input signal down to a controllable level.The

15dB pad is not functional when the LINE switch is depressed.

line

The input preamp circuit is set up to accept a mic-level signal. This

signal is brought in via the XLR mic-input connector located on the rear

panel.The 1/4" TRS input jack is disabled.

The input preamp circuit is set up to accept a line-level signal from

either the XLR mic-input connector or the 1/4"TRS input jack, both locat-

ed on the rear panel.

When a plug is inserted into the 1/4" TRS input jack, the XLR mic-input

connector is disabled.

polarity reverse—ø

This feature is used for correcting or minimizing polarity and phase relat-

ed errors. For example, occasionally a balanced input connection is

reverse-wired before it gets to the mixing console. This can happen in

microphones, or in snake line interfaces. By using the polarity reverse fea-

ture, this type of error can be corrected.

polarity inverted

polarity not inverted

If the channel peak

LED is illuminated,

first try lowering

the input gain control.

Only when this method is

unsuccessful should the pad

switch be engaged.

If the 48V phantom

power switch is

engaged, depressing this

switch disconnects phantom

power from the mic input

XLR.

When similar signals

from different chan-

nels are combined, phase

cancellations can occur.

Reversing the polarity of an

input signal often corrects

such phasing errors.

The 48V switch should

not be engaged when

using standard (dynamic)

microphones, or other

sources that do not use

phantom power.

p. 8

X-Four owner’s manual

mono input module

module panel

legend

block diagram

p. 9

mono input module

features

gain

The Input gain control range is closely related to the status of the PAD

switch and the LINE switch. In order to establish proper gain structure in

the console, input gain settings must be set correctly.

LINE—switch-up PAD—switch-up

15 to 75dB of gain can be added the mic-input signal.

The impedance at the input XLR is 4kΩ.

LINE—switch-up PAD—switch-down

-5 to 55dB of gain can be added to the mic-input signal.

The impedance at the input XLR is 4kΩ.

LINE—switch-down PAD —switch-up or -down

-10 to 45dB of gain can be added the line-input signal.

The impedance at the input XLR and input 1/4" TRS is 20kΩ.

high-pass filter—HPF

Proper use of the high-pass filter reduces or eliminates unwanted low fre-

quencies without substantially affecting the program material. Quite often

such unwanted low frequencies are included with in-coming mic- or line-

input signals. For example, stage rumble or wind can be picked up through

vocal mics.The slope of the high-pass filter is 12dB per octave.

HPF

High-pass filter is on @80 Hz, 12 dB/octave

If the channel peak

LED is illuminated,

first try lowering

the input gain control.

Only when this method is

unsuccessful should the pad

switch be engaged.

p. 10

X-Four owner’s manual

mono input module

module

legend

block diagram panel

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