Matrix, Mute groups – Allen&Heath GL3300 User Manual

Page 16

GL3300 U

SER

UIDE

MATRIX

MUTE GROUPs

let you mute a selected combination of channels with a single key

press. Applications include muting unused channels when mixing different bands,
muting all channels except 2-track playback during intermission, muting effects,
muting a bank of radio mics during an instrumental number, muting stage mics during
scene changes etc....

The GL3300 includes

4 MUTE GROUPs

controlled by a bank of 4 large illuminated

buttons between the Group and L-R faders. These latching switches may be selected
one at a time or together.

To set up a mute group, press one of the mute group selector switches

M1, M2, M3,

on the input channels. Now press the corresponding mute group switch in the

master section. The mute group switch and the channel mute switch will illuminate and
the input channel signal will be muted.

An input channel can be a member of more than one mute group by simply pressing
another channel mute group selector switch.

Two matrix outputs

and

are provided. These are additional outputs on TRS jacks

controlled by 60mm smooth travel

FADERS

and with

AFL

monitoring to check the

post fader signal. The matrix mix is created from the 8 groups, L and R by adjusting
the

MTX

level controls. These signals are fed post their respective faders. Note that

in '

MONITOR MODE

' (

REVERSE

selected) the matrix is still fed from the groups

(now routed via the aux masters). External inputs to the matrix are available from
the adjacent stereo returns. The matrix outputs can be balanced by fitting the balance
option, refer to the Internal Link Options section in this user guide.

The matrix outputs satisfy a host of applications. Traditionally the matrix has been
used to feed additional speaker systems such as auditorium balcony speakers. These
are fed through delay units to compensate for acoustic delay due to the distance from
the main speakers. Here the balance of the mix may be slightly different from the
main speakers, for example vocal light to keep the vocals nearer the stage. Adjusting
the balance of the groups to the matrix achieves this. Another example is live sound
recording where the PA mix may be necessarily lacking in bass due to the acoustic
output of the orchestra or 'backline'. Compensate for this by recording from the
matrix with the group feeds adjusted for an even recording balance.

MUTE GROUPS

GROUP

MUTE

This manual is related to the following products:

GL3300 v2