Operation Manual
Allen & Heath 18 ZED-14, 18 & 24 User Guide
STEREO INPUT CHANNEL ST1
STEREO Aux 1 & 2 switch
This is an under-panel selector switch that configures Auxes 1 & 2 to be
either mono sends or a stereo send pair.
UP: A mono sum of the left & right stereo channel signal is sent to Aux
buses 1 & 2 by the control knobs.
DOWN: The left stereo channel signal is sent to Aux 1 and the right is
sent to Aux 2 by the control knobs.
Note: This can be useful when setting up a seperate stereo output from
the main L R output using Auxes 1 & 2, possibly for recording. This can be
selected to feed the USB output to create an independent stereo feed for
recording using a computer.
Balance control
The Balance control varies the relative levels between the left and right
channels.
Mute Switch
Mutes the signals to the main L R and the Aux buses.
Aux 1 & 2 sends
These control the level of the signals sent to the Aux 1 & 2 buses. The Aux
1 & 2 send controls are configured either as two mono sends or as a stereo
pair depending on the position of the STEREO switch (please see above).
Auxes 1 & 2 are pre-fade, but muted when the Mute switch is pressed.
There is 6dB of gain at the fully clockwise position.
Aux 3 & 4 sends
These controls take a mono sum of the left & right stereo channel signals
from after the fader and send them to the Aux 3 and Aux 4 buses respec-
tively. They are muted when the Mute switch is pressed and have 6dB of
gain at maximum.
PFL Switch & PK! LED
The Pre-Fade Listen switch takes a mono sum of the stereo channel signals
from before the fader and mute switch. When pressed the signal will appear
on the L R meters and be fed to the headphones circuit for monitoring.
The PK! LED illuminates dimly to indicate the PFL switch is pressed, and
brightly to indicate the channel signal is within 5dB of clipping.
Fader
The 100mm fader affects the level of the channel signal to the left & right
buses and Auxes 3 & 4. There is 10dB of gain at the top and the unity gain
position is marked by “0”.
OO +6
AUX1
PRE
OO +6
AUX2
PRE
OO +6
AUX3
OO +6
AUX4
POST
LR
BAL
=
PK !
PFL
STEREO
MUT
E
7-8
POST
OO
30
5
10
20
5
0
10