WZ
3
12M User Guide 15
MIX SENDS These rotary controls adjust how much channel signal
is sent to the 12 mix outputs. Each has its own control. They adjusts
from fully off to +6dB boost. Unity gain 0dB is marked at 3 o’clock
position. Factory default settings should satisfy the most common
applications:
All sends = Post-EQ
Sends 1-4 = Switched pre/post using POST/PRE switch
Sends 8-12 = Post-trim (post-fade)
Some of these settings may be changed if preferred by soldering
internal jumper link options. Refer to the system block diagram for
further information on these options. This work should be referred to
an authorised Allen & Heath service agent..
POST/PRE When pressed, the pre-trim (fade) channel signal is
sent to auxes 1-4. When released the post-trim signal is sent.
In monitor mixing, the channel sends are usually set post-trim. This
means the channel trim control (fader) can be used as a master level
for that source feeding all mixes.
Stereo or Mono Odd/even pairs of mixes can be configured for
mono or stereo operation by setting a recessed mode switch near the
master faders. In MONO mode two independent sends are available.
In stereo mode, the odd numbered send becomes a stereo level
control and the even send becomes a pan control to position the sound
within the stereo LR image. Any combination of mono and stereo
mixes may be configured. Before starting, configure how you want the
console to work by setting the STEREO switches in the master section.
MUTE When pressed the channel signal is turned off. This affects
the feed to all mixes but does not affect the insert send. The red
indicator lights when the channel is muted.
CHANNEL TRIM This is the channel fader. Use the control to
adjust the level feeding all post-trim mix sends. It lets you make an
adjustment to compensate for a change in source level, to make a
quick level change affecting all mixes, or deal with a problem such as
feedback. Alternatively you could use it to create a starting point mix
for several monitors. For normal operation, start with CH TRIM set to
its 0dB (unity gain) position (3 o’clock – marked with an arrow).
PFL Press PFL to listen to the pre-trim channel signal in the
headphones and local engineer’s monitor without affecting the mix
outputs. The PFL signal overrides and currently selected mix AFL
signal. The console monitor LR meters display the channel signal.
The red PK indicator half lights to show that PFL has been selected on
that channel. Selecting more than one PFL at the same time mixes
those signals together in the monitor.
PEAK The red indicator illuminates when the channel signal is
within 5dB of clipping. This gives you enough warning to reduce the
GAIN control before you hear signal distortion. It senses the audio at
three points in the signal chain – pre-insert, pre-trim and post-trim.
SIGNAL The green signal presence indicator lights when the
channel pre-fade signal is greater than -12dBu.
PK!
MUTE
PFL
SIG
PAD
+48V
HPF
HF
+15
4k
15k
6k
1k
-15
500Hz
700
HM
3k
(LINE)
+15
250
1k
400
-15
70
35Hz
LM
45
180
+15
+15
-15
LF
-15
CH TRIM
OO +6
OO +6
OO +6
OO +6
OO +6
OO +6
OO +6
OO +6
OO +6
OO +6
OO +6
OO +6
OO +6
POST
PRE
EQ IN
MIX
PAN
MIX
6
5
ST
C
MIX
PAN
MIX
2
1
ST
C
MIX
PAN
MIX
4
3
ST
C
MIX
PAN
MIX
8
7
ST
MIX
PAN
MIX
10
9
ST
MIX
PAN
MIX
12
11
ST
10- 10
GAIN
20
0
4060
50
40
30
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