Allen&Heath MIXWIZARD3 20S - Manual (Page 17)

WZ 3 20S User Guide 17
The STEREO Input Channel
Dual stereo inputs Each of the eight stereo channels has two
stereo inputs which can be used separately, mixed together or split so
that one feeds the channel, the other routes direct to LR. For example,
you could mix two sound effects playback devices or two reverb
returns together into one channel. This can be useful in saving
channels, letting you mix many inputs in a small space. The L input
signal normals through the R input socket so that a mono source may
be plugged in to feed both left and right sides of the stereo channel.
A Unbalanced TRS inputs. The GAIN control adjusts from fully off to
+16dB gain. Press the ON switch to turn the input on.
Routing mode switch Recessed switch to prevent accidental
operation. In the normal up position the A signal mixes with the B
signal into the stereo channel. When pressed the A signal is routed
direct to the LR mix instead of the channel. This lets you use these
inputs as simple stereo returns in addition to the full stereo channels,
providing another eight independent stereo sources to the LR mix.
B Balanced XLR inputs. The GAIN control adjusts from fully off to
+16dB gain. Press the ON switch to turn the input on. These inputs
always feed the stereo channels.
EQ A 4-band fixed frequency EQ provides independent control of
four frequency bands. HF and LF are shelving filters which affect high
frequencies above 12kHz, and low frequencies below 80Hz
respectively. HM and LM are bell shaped peak/dip filters which affect
frequencies centred around 2.5kHz and 250Hz respectively. These
have a width (Q) of 1.8. All bands can be boosted or cut by up to 15dB
and have a centre detented 0dB position.
AUX SENDS These work as described for the mono channel. The
L and R sides of the stereo signal sum together to feed each aux in
mono. This can be changed using an internal jumper option so that L
feeds auxes 1,3 and R feeds auxes 2,4.
BAL Balances the level of the L signal against the R signal to
compensate for differences in the source signal, or to position the
signal within the stereo image. The centre equal level position is
detented for quick resetting.
MUTE When pressed the channel signal is turned off. This affects
the feed to the LR mix, and pre and post-fade aux sends. The red
indicator lights when the channel is muted.
PFL Press PFL to listen to the summed L+R pre-fade channel signal
in the headphones or AB monitor (if configured) without affecting the
main outputs. The console main LR meters are interrupted with the
channel signal. The red PK indicator half lights to show that PFL has
been selected on that channel.
PEAK The red indicator illuminates when the channel pre-fade
signal is within 5dB of clipping. This gives you enough warning to
reduce the GAIN control before you hear signal distortion.
SIGNAL The green signal presence indicator lights when the
channel pre-fade signal is greater than -12dBu.
L R
ON
B
A
5
10
20
5
10
0
30
PRE
MUTE
SIG
PK! PFL
BAL
6
AUX
AUX
5
+6
=
POST
PRE
+6
AUX
AUX
4
3
AUX
AUX
2
1
POST
+6
+6
+6
+6
-15
-15
-15
-15
LF
LM
HM
+15
+15
+15
+15
ON
HF
TO CHANNEL
LR TO
-5 GAIN
-10
-20
5
10
16
0
-5 GAIN
-10
-20
5
10
16
0
EQ IN