Allen&Heath GL2400 - Manual (Page 20)

20 GL2400 User Guide
The AUX 5-6, L-R-M Masters
AUX 5 and 6 Masters These function in the same way as
described for auxes 1 to 4. In monitor mode, the recessed REV switch
reverses the AUX5 master with L, and AUX6 with R. Here the aux
signals are presented to the L and R XLR outputs complete with their
inserts. The LR mix swaps on to the Aux TRS jack outputs. Note that
the LR mix always feeds the matrix and 2-track regardless of mode
selected.
LR Masters Separate 100mm faders control the main mix L and R
output levels. They provide +10dB maximum boost. Each master
includes a 4 LED bar meter, an AFL switch and a MUTE switch so that
L and R can be separately monitored and muted. This is most useful
in monitor mode where these masters carry the AUX5 and AUX6
signals.
M Master A 100mm fader adjusts the level of the signal to the M
output XLR. The master is fully featured and includes a 4 LED bar
meter, an AFL switch and a MUTE switch.
The M output adds a true touch of genius to the versatility of the
GL2400. The source is selected using two mode switches above
the R fader. These are recessed to prevent accidental operation. Use
a pen or pointed object to set the position.
FOH mode – With both switches in the up position (flush with the
panel), the post-fade L and R mix are summed together to provide a
mono source. Use this to feed a mono PA, fill, delay or zone speakers,
or even a mono broadcast or recording send.
Monitor mode - Press the upper switch to create an engineer’s
monitor listen wedge feed from the AFL/PFL mix. Note that in this
mode the M AFL switch is disabled. It is common to use a wedge
speaker of the same type used on stage to listen to and check the
various monitor mixes being sent to the performers. Together with the
group/aux REV function, the GL2400 can be configured as a
compact yet fully featured monitor console.
Aux-Fed-Subs mode – Press only the lower switch to configure M as
the master for AUX6. This innovative feature is ideal when driving your
sub bass speakers with their own mix fed from an aux, a technique
becoming more popular in FOH mixing. This mode provides all the
main PA masters (L, R and SUB) with faders, meters, MUTE and AFL.
Using the faders you can adjust the level of the main PA without losing
the balance between the tops and subs. The signal is not affected by
the AUX6 rotary master. However, the rotary output can still provide
another sub feed with its own independent master control.
Route all sources to LR in the usual way to feed the main ‘top’
speakers. In addition, route sources with low frequency content such
as kick drum, bass, keyboards, sound effects to the sub speakers by
turning up the AUX6 send rotary on those channels. Make sure all
channel aux 5-6 sends have been set for post-fader operation. Use
two crossovers, one for the stereo LR mid/top frequencies, the other
for the sub feed. Set the system up so that the correct balance
between tops and subs is achieved when the channel send is at its ‘0’
(3 o’clock) position and the L, R and M faders in line with each other.
Aux-Fed-Centre mode – The same principle as above, but AUX6 is
used to feed a centre mix such as a fill or C in an LCR system. To
route to C only, turn up the channel AUX6 send to 3 0’clock unity
position, and turn off its assignment switch to LR.
MODE
REV
AFL
REV
AFL
AFL
MUTE
AFL
MUTE
M SOURCE
MONITOR
FOH
PK!
+6
0
SIG
PK!
+6
0
SIG
PK!
+6
0
SIG
LISTEN WEDGE
AUX 6
MONO (L+R)
AFL
(AUX FED SUB)
OO +10 OO
AUX
5
AUX
0 6
+10
0