Allen&Heath MIXWIZARD3 20S - Manual (Page 15)

WZ 3 20S User Guide 15
The MONO Input Channel
+48V Switches +48VDC to the channel input XLR for powering
microphones 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 cables
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
normals 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 up to +30dBu.
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.
HPF Switches in the channel high pass filter. This attenuates
frequencies below 80Hz by 12dB per octave. The filter is pre-insert,
pre-EQ. Select the HPF to reduce low frequency noise such as microp
hone popping, stage noise and tape transport rumble.
EQ A 4-band semi parametric 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 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.
10 - 10
GAIN
20 0
40 60
50
40
30
R L
30
0
10
5
20
10
5
PRE
SIG
PK!
PAN
6
AUX
AUX
5
MUTE
PFL
+6
=
PRE
POST
+6
AUX
AUX
4
3
AUX
AUX
2
1
+6
POST
+6
+6
+6
-15
LF
-15
+15
+15
180
45
LM
35Hz
70
-15
400
1k
250
+15
(LINE)
3k
HM
700
500Hz
-15
1k
6k
15k
4k
+15
HF
HPF
+48V
PAD
EQ IN
+20
+15
+10
+5
0dB
-5
-10
-15
-20
20 50 100 200 500 1k 2k 5k 10k 20k
10k 5k 2k 1k 500 200 100 50 20 10
-40
-35
-30
-25
-20
-15
-10
-5
0dB
+5
20k 10k 5k 2k 1k 500 200 100 50 20
-20
-15
-10
-5
0dB
+5
+10
+15
+20
+20
+15
+10
+5
0dB
-5
-10
-15
-20
20 50 100 200 500 1k 2k 5k 10k 20k