Allen&Heath GL2800 - Manual (Page 17)

GL2800 User Guide 17
AUX SENDS
These rotary controls adjust how much channel
signal is mixed to each of the aux outputs. They adjusts from fully off
to +6dB boost. Unity gain 0dB is marked at 3 o’clock position.
AUX SENDS 1-8 Mono aux sends with independent control.
AUX SENDS 9-10 A dedicated stereo aux send with level and
pan controls. Set pre-fade to create stereo monitor mixes such as IEM.
Set post-fade to create stereo recording feeds or to balance between
two effects devices such as reverb.
PRE Press to select the channel pre-fader source, release for post-
fader. Auxes 1 to 4, 5 to 8 and stereo aux 9-10 are grouped for
pre/post switching. Pre-fade aux sends are not affected by the channel
fader movements. These are typically used to feed stage monitors.
Post-fade aux sends follow the channel faders and are typically used
to send a proportion of the channel signal to an effects device such as
reverb or delay. Note that post-fade sends may be preferred when the
console is configured in monitor mode so that the faders become
channel ‘masters’ affecting all monitor mixes.
PRE-EQ Changes the pre-fade aux source from post-EQ (switch up)
to pre-insert, pre-EQ (switch pressed) so that inserted compressors
and the EQ do not affect the sends when mixing monitors from FOH.
This affects all auxes set pre-fader for the channel. The switch is
recessed to prevent accidental operation once set. Use a pointed
object to change the setting.
PAN Positions the channel signal between L/R in the stereo mix,
and odd/even if routed to the groups. The centre position (mono
image) is detented for quick resetting.
MUTE When pressed, the channel signal is turned off. This affects
the feed to the LRM mix, pre and post-fade aux sends and direct
output, but does not affect the insert send. The red indicator lights
when the channel is muted. Always mute the channel when switching
phantom power or plugging the cables and sources.
PFL Press PFL to listen to the pre-fade channel signal in the
headphones and local monitor without affecting the main outputs.
The console PFL/AFL active red indicator lights and the monitor LR
meters display the channel signal. Selecting more than one PFL at
the same time mixes those signals together in the monitor.
METER A 4 LED channel meter displays the pre-fader signal level.
‘SIG’ lights when a signal level of -12dBu is detected. ‘0’ lights when
the nominal 0dBu level is reached, and ‘+6’ at +6dBu. ‘PK’ lights
when the channel pre-fade signal is within 5dB of clipping. This gives
you enough warning to reduce GAIN before you hear signal distortion.
ROUTING Press to route to the required combination of L-R, M
and the 8 groups. Use PAN to position the signal between L/R or the
odd/even group pairs. To route to a single group set PAN fully to one
side. Check that you have set these switches correctly before you start
mixing.
FADER A 100mm smooth travel fader with protective dust cover
controls the channel level feeding the main mix, groups and post-fade
aux sends. It also affects the direct output if this has been set to post-
fade using the internal option jumpers. The fader provides +10dB
maximum boost above its normal unity gain 0dB position.
MUTE GROUPS Press these switches to add the channel to
Mute Groups 1 to 4 as required. Pressing the master mute switch
mutes all channels assigned to that group.
10k 5k 2k 1k 500 200 100 50 20 10
-40
-35
-30
-25
-20
-15
-10
-5
0dB
+5
+20
+15
+10
+5
0dB
-5
-10
-15
-20
20 50 100 200 500 1k 2k 5k 10k
+20
+15
+10
+5
0dB
-5
-10
-15
-20
20 50 100 200 500 1k 2k 5k 10k 20k
20k 10k 5k 2k 1k 500 200 100 50 20
-20
-15
-10
-5
0dB
+5
+10
+15
+20
HPF
LF / HF
HM
LM
+1
+3
+6
-12
-16
-9
-6
-3
-1
-20
0
+9
-30
-40
-50
-60
-70
-80
-90
+12
+16
+20
SIGN
AL-
TO-
NOISE
RATIO
DYNA
MIC
R
A
NGE
HE
AD
RO
OM
CLIPPING
NOISE
NO
R
M
AL OP
E
R
ATI
N
G
R
A
NGE
SIGNAL
!