Bedienungsanleitung Allen-Heath ML 3000 (Seite 26 von 48) (Englisch)

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26 ML3000 User Guide

Using LCRplus

The ML3000 LCRplus system extends signal

imaging beyond conventional LR and LCR panning

by allowing full 3 speaker balance and positioning

from each channel and group. This satisfies the

standard requirements of mono, stereo and

conventional LCR speaker systems as well as

providing a unique extended capability.

The MAIN MIX. This comprises 3 outputs: L (left),

R (right) and C (centre). How you use these

depends on the type of sound system you are

running. For example, you may use all for a 3

cluster LCR system, just L and R for a conventional

stereo system, or C only for a mono system.

PAN and BLEND. These are the two imaging

controls that let you position the sound anywhere in

the three output mix. For example, it could be

balanced in all three outputs, somewhere between

any two, or routed to just one. The controls have a

smooth response with 3dB centre attenuation to

ensure that the power is distributed evenly between

the speakers as you move the signal around.

MONO PA. To control a mono sound system using

a single master fader, set BLEND fully clockwise to

route all the channel signal to the C output. The LR

outputs are not used and PAN has no effect.

MONO PA

PAN

BLEND

CLR

LRC

STEREO PA. To control a stereo sound system,

set BLEND fully anticlockwise to route the signal to

LR only. Use PAN to position the sound between

the speakers. The C output is not used.

LRC

STEREO PA

PAN

BLEND

CLR

STEREO + CENTRE FILL. A centre fill speaker is

used to reinforce the sound to the first few rows of

the audience when the L and R speakers are

positioned far apart. Start with BLEND fully

anticlockwise to set up the main LR mix. Then

gradually rotate BLEND clockwise to raise the

signal in the fill speaker as required. It should not

be necessary to adjust beyond the centre position

at which point equal signal is fed to all 3 outputs.

Beyond centre the LR signal would drop

significantly. Having LCRplus available on every

channel and group means that you can choose

which signals are reinforced, for example the back

stage mics rather than the front floats which would

feed back if routed to the fill.

LRC

STEREO+FILL

PAN

BLEND

CLR

LCR PA. LCR systems are increasingly popular in

large installed or touring systems. They comprise

three main speaker stacks, left, centre and right to

provide better coverage of a large audience. In

some situations C is used only for sounds such as

vocals to lift them out of the mix making them more

intelligible, leaving backing instruments in the LR

speakers. In other situations individual sounds are

panned between the speakers according to source

position.

Adjust both BLEND and PAN to position each

sound exactly where you want it whether in one

speaker, between two, or blended across all three.

Use BLEND to balance between the LR and C

speakers. Use PAN to adjust the balance between

the L and R speakers. PAN does not affect the

level of the C output.

LRC

LCR

PAN

BLEND

CLR

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