Allen&Heath MixWizard WZ4 14-4-2 - Manual (Page 15)

Allen & Heath 15 WZ 4 14:4:2 User Guide
The MONO Input Channel
+48V Switches +48VDC to the channel input XLR for powering mi-
crophones or DI boxes that need phantom power. The power is current
limited through 6k8 ohm resistors to pins 2 and 3.
WARNING: Do not connect unbalanced sources or ca-
bles to inputs with phantom power selected. To avoid loud
clicks always mute the channel before switching +48V on or off
and when plugging or unplugging microphones.
PAD (LINE) Press this switch to select the channel TRS jack LINE
input. Release the switch to select the XLR MIC input. The XLR nor-
mals through the TRS socket. With nothing plugged into the line input
the switch therefore becomes a PAD for the mic XLR. It attenuates the
input signal by 20dB for connection to high level microphone or line
sources.
GAIN Adjusts the input sensitivity to match the connected source to
the internal 0dBu operating level of the channel. Provides a variable 50dB
range from +10 to +60dB gain (mic), or -10 to +40dB (line, pad selected).
The gain should be set using PFL so that the console meters average ‘0’
with loudest moments lighting ‘+6’. Reduce gain if the red peak indicator
lights.
Important note on setting channel levels: Use PFL to set the
GAIN controls for correct signal level through each channel. Use the
faders to balance each signal in the mix. We do not recommend setting
the faders to ‘0’ and mixing using the GAIN controls.
HPF Switches in the channel high pass filter. This attenuates frequen-
cies below 80Hz by 12dB per octave. The filter is pre-insert, pre-EQ.
Select the HPF to reduce low frequency noise such as microphone pop-
ping, stage noise and tape transport rumble.
EQ A 4-band semi parametric EQ provides independent control of
four frequency bands. Use EQ IN to compare the sound with the equal-
iser switched in or out of circuit. 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 around a centre point which can be swept from 500Hz to
15kHz and 35Hz to 1kHz respectively. These have a width (Q) of 1.8.
All bands can be boosted or cut by up to 15dB and have a centre detent
0dB position.
Check for the best microphone selection and placement before using the
EQ. Start with the EQ set flat and apply only as much boost or cut as is
really needed. When dealing with problem frequencies cut rather than
boost where possible.
EQ IN
30
5
0
30
PAD
+48V
40
50
HPF
60 40
0
20
GAIN
- 10 10
4k
15k
6k
1k
500Hz
700
3k
(LINE)
250
1k
400
70
35Hz
45
180
+6
+6
+6
POST
+6
1
2
AUX
AUX
3
4
AUX
AUX
+6
POST
PRE
R
EVEN
L
+6
PFL
10
5
MUTE
5
AUX
AUX
6
PAN
PK!
SIG
1-2
L-R
ODD
PRE
20
3-4
OO
O O
HM
LM
LF
HF
O O
O O
O O
O O
O O