Allen & Heath
17
WZ
4
14:4:2 User Guide
The STEREO Input Channel
Dual stereo inputs
Each of the two 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 re-
turns 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.
ST1, ST3
Unbalanced TRS inputs. The GAIN control adjusts from
fully off to +16dB gain. Press the ST1(3) switch to turn the input on.
Routing mode switch
Recessed switch to prevent accidental
operation. In the normal up position the ST1 (ST3) signal mixes with
ST2 (ST4) into the stereo channel. When pressed the 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 four independent stereo sources to the LR mix.
ST2, ST4
Balanced TRS inputs. The GAIN control adjusts from
fully off to +16dB gain. Press the ST2 (4) 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.
Use EQ IN to compare the sound with the equaliser switched in or out
of circuit. HM and LM are bell shaped peak/dip filters which affect fre-
quencies 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 so that L feeds
auxes 1, 3 and R feeds auxes 2, 4. The auxes are always post-EQ.
BAL
Balances the level of the L signal against the R signal to compen-
sate 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, groups and pre and post-fade aux sends. The
red indicator lights when the channel is muted.
PFL
Press PFL to display the summed L+R pre-fade channel signal on
the main meters and listen to it in the headphones and local monitor
without affecting the main outputs. 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 chan-
nel pre-fade signal is greater than -12dBu.
ROUTING
As the mono channel, routes the left signal to L and
odd groups, right signal to R and even groups.
EQ IN
0
16
10
5
-20
-10
GAIN
-5
1-2
L-R
3-4
5
0
10
5
20
0
16
10
5
-20
-10
GAIN
-5
TO
LR
(ST1+ST2)
TO
ON
HF
11-12
ON
HM
LM
LF
+6
+6
+6
+6
POST
1
2
AUX
AUX
3
4
AUX
AUX
+6
PRE
POST
R
EVEN
L
+6
5
AUX
AUX
6
BAL
ODD
PFL
PK!
SIG
MUTE
PRE
30
OO
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
Содержание MixWizard WZ4 14:4:2
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