Allen&Heath GL2800 - Manual (Page 15)

GL2800 User Guide 15
GROUP, L, R, M OUT
The main console mix outputs are on
electronically balanced XLR. These produce the professional standard
+4dBu when the meters read ‘0’, and provide up to a maximum +26dBu.
The L, R and M outputs typically feed the house PA system in live sound
mixing, or 2-track and mono recorders in studio mixing. In monitor mode,
these outputs reverse with the Aux TRS jack connections.
AUX OUT 1-10 Each aux send is available on an impedance
balanced TRS jack operating at -2dBu line level. An internal option is
available to fit a balanced line driver IC to provide an electronically
balanced output operating at +4dBu. Note that it is not usual to require
this option as the impedance balanced standard drive provides sufficient
interference rejection when feeding balanced equipment inputs. The aux
sends are typically used to feed monitors, effects devices such as reverb
and delay, and for special mix requirements. In monitor mode, these
outputs reverse with the group and LR XLR connections.
MATRIX OUT 1-4 Each matrix output is available on an impedance
balanced TRS jack operating at -2dBu line level. An internal option is
available to fit a balanced line driver IC to provide an electronically
balanced output operating at +4dBu. The matrix outputs are typically
used for stereo or mono recording or broadcast feeds, delay and fill
speakers, zone feeds, additional monitors such as IEM, hearing assist
loops and so on.
MATRIX EXT IN 1-4 Each matrix has an unbalanced 0dBu line level
TRS jack input. An external signal such as ambience mix, additional or
sub mixer, remote source, reference tone and so on may be mixed in to
each matrix. The inputs are normalled as shown in the diagram here.
This means that you can plug in just one jack (EXT1) as a common
source to all matrix, two jacks (EXT1,2) as a common stereo source to
matrix pairs, or four independent sources. This is ideal for adding mono
or stereo ambience to recordings or in-ear monitors fed from the matrix.
2-TRACK IN and OUT Unbalanced TRS jack outputs and TRS
inputs connect to popular recording and playback devices such as CD,
MiniDisc, computers and tape machines. Nominal line level is -2dBu.
The 2-track SEND always follows the post-fade LR mix regardless of
mode switch configuration. The 2-track RETURN can be used for
monitoring a mono or stereo recording, or as a simple input for playback
of walk-in and background music. The L input normals through the R
socket for plugging in a mono source on a single jack.
MONITOR OUT These impedance balanced line level TRS jack
outputs follow the post-level monitor signal. Separate sockets are
provided for the L and R signals. Use these to feed local speaker or other
monitor systems.
SYS-LINK V2 OPTION Blank plates are fitted here as standard.
The GL2800 Sys-Link V2 (version 2) input/output option kit is available
from Allen & Heath. Refer to OPTIONS later in this guide.
(WEDGE)
M
OUT
OUT
TB/GEN (L) (R)
10
AUX AUX
9
(GRP) (GRP) (GRP) (GRP) (GRP) (GRP) (GRP) (GRP)
(GRP/AUX REVERSE)
8
AUX AUX
7
AUX
6
AUX
1
AUX
2
AUX
3
AUX
4
AUX
5
GRP
2
(AUX) (AUX) GRP (AUX) GRP (AUX) GRP (AUX) GRP (AUX) GRP (AUX) GRP
3 4 5 6 7 8
(AUX)
1
GRP OUT
L R
OUT (9) (10)
IN 2TRK
R
L/M
R
L
OUT
MATRIX EXT IN
(COMMON)
3
MTX OUT
4
MTX OUT
2
MTX OUT
1
MTX OUT
MTX MTX MTX MTX
IN IN IN IN
3 4 2 1
Operating Modes
In FOH mode, LR and M feed
the main PA. Groups outputs 1-
8 may be used for multitrack
recording, zone feeds and so
on, or simply left unconnected
where they are used as
‘subgroups’ to LRM for level
masters and/or inserted
processing.
In monitor mode Groups 1-8
and LR XLRs and inserts
become the 10 aux mix
masters. Stereo Aux 9-10 is
available on the LR XLRs. M
becomes the engineer’s listen
wedge AFL/PFL feed. This
configures the console with 10
main stage monitors and an
engineer’s output. The groups
and LRM mix are still available
via the matrix to provide yet
more monitor feeds from the 4
matrix outputs.
IN1
IN2
IN3
IN4
MATRIX EXT IN
OUT
R L
MONITOR