Allen&Heath GL4800 USER GUIDE - Manual (Page 29)

GL4800 User Guide 29
LAMP CONNECTORS - Two top panel 4-pin XLR connectors are
provided for connection to gooseneck lamps. It is recommended that
these are the standard 12V 2.5 watt type.
THE CONSOLE MONITOR - The GL4800 offers a comprehensive
signal monitoring system. Apart from the extensive metering facilities
there is a monitor section which operates independently of the main
outputs.
PFL TRIM - Adjust the trim control for the most comfortable listening
balance between AFL and PFL levels in the headphones, local monitor
or listen wedge. It is ypical that the AFL levels are generally quieter
than PFL in live sound mixing due to the fader settings in the mix.
Normal level is indicated at the centre detented '0' mark. You can
reduce the listening level by up to 12dB, or boost it by up to 6dB.
Adjusting the trim does not affect the PFL meter readings which
always display the actual signal level.
HEADPHONES MONITOR - You can plug in up to two headphone
sets, one on the top panel and the other safely protected under the
armrest. The headphone monitor has its own PHONES LEV volume
control.
LOCAL MONITOR - A separate stereo monitor output is provided for
connection to a local amplifier/speaker monitor system. This is usually
positioned on or near the console so that the engineer can monitor the
signals on speakers rather than headphones. The volume is
independently controlled using LOCAL LEV. The local monitor
doubles as a studio monitor in the recording environment.
L-R MIX - Press this switch to listen to the post fader LR main mix. In
live sound mixing it is often preferred to turn off the LR monitoring until
required. This prevents distracting audio spill from the headphones or
local monitor. Of course, pressing any AFL or PFL activates the
monitors as normal.
STEREO/MONO - Press this switch to listen to the selected monitor
source in mono (L+R sum). This can help identify problems with the
mono/stereo compatibility of the signal.
LAMP
MONO
STEREO
5
2
4
7
8
10
1
0
3
6
9
5
2
4
7
8
10
1
0
3
6
9
LEV
PHONES
LEV
LOCAL
L-R MIX
+6
0dB
-12
TRIM
PFL
1