User guide

ManualsBrandsALLEN & HEATH Manualsaudio & home theatreGL2800-48

22 GL2800 User Guide

12x4 MATRIX

The matrix adds to the powerful multi-tasking capability of the

GL2800. It provides a set of 4 additional console outputs. It is a

‘mixer within a mixer’ creating its output from any combination of the

groups, main LR mix and external inputs. It can be used to provide

duplicate main outputs or to create new mixes from these outputs.

The matrix controls are positioned conveniently away from the live

performance controls to avoid accidental operation.

Use the matrix to create special mixes for delay fill and zone speakers,

recording and broadcast feeds, IEM (in-ear monitors), hearing assist

loops and so on. Mono and stereo feeds can be created. For

example, mix L and R to create a mono sum output to feed an

additional zone, or use two matrix outputs with L fed to one, R to the

other to create an independent stereo main output. Mix in an external

source such as an ambience microphone preamp to add atmosphere

and audience reaction to a recording or monitor. Compensate for an

acoustically loud backline by boosting selected groups in a live

recording. For more information, refer to ‘Operating Tips’ later in this

guide.

EXT IN Mixes in an external nominal 0dBu line level source. The

rotary provides +6dB boost. Note that EXT IN jack sockets are

normalled (linked) in a way that lets you plug in a mono or stereo

common source to feed all the matrices, or an independent source to

each. Plug into EXT1 only to feed one source to all four matrix EXT IN

controls. Plug L into EXT1 and R into EXT2 only to feed a stereo

source to matrix 1-2 and 3-4.

Some examples include adding ambience sources to recordings and

in-ear monitoring, adding a direct output or an aux mix to quickly

create a monitor from the main mix plus selected channel/s, and

linking in another console to feed the same PA in a festival or other

dual console situation.

GRP 1-8 Mixes in the post-fader, post-mute group mix. The rotary

provides +6dB boost.

L,R,M Mixes in the post-fader, post-mute main LR mix. The rotary

provides +6dB boost. Turn up both L and R to create a mono sum

from the stereo LR mix. Turn up L in one matrix, R in another to create

a stereo output from two matrices.

LEVEL The master level control (fader) for the matrix. Provides

+6dB boost above the normal ‘0’ setting.

MUTE When pressed the matrix output is turned off. The red

indicator lights when the matrix is muted. Mute does not affect the

matrix AFL monitoring.

Note that the matrix mix can be checked using the meters and

headphones by selecting the related monitor select switches. These

provide both mono and stereo monitoring of the matrix.

MUTE

LEVEL

GRP

EXT

OO +6

IN1

IN2

IN3

IN4

MATRIX EXT IN