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MG20XU/MG20/MG16XU/MG16/MG12XU/MG12 Owner’s Manual
17
Controls and Connectors
r [PAD] switch
When this switch is turned on ( ), the input signal from
the [MIC/LINE] jack of the mono input channel is attenuated
by 26 dB. Turn this switch off ( ) if you’ve connected a
microphone or other device with a low input level to the
channel. Turn it on ( ) if you’ve connected a line-level
device.
NOTE
There may be some noise when operating switches. To prevent
this, turn the [ON] switch of a channel off before operating
other switches.
t [HPF] (High Pass Filter) switch
Turning this switch on ( ) will apply a high-pass filter that
attenuates frequencies below 80 Hz in the signal by a slope of
12 dB/octave.
NOTE
Turning the [HPF 80Hz (MIC)] switch on will apply a dedicated
high-pass filter only to the signal from the [MIC] jacks.
y [GAIN] knobs
For adjusting the gain of the input signal. Mono input chan-
nels have a [PAD] switch r that lets you change the range of
this control.
The adjustable gain range is as follows.
u [COMP] knobs
For adjusting the amount of compression applied to the chan-
nel. As the [COMP] knob is turned to the right the threshold,
ratio, and output gain are adjusted simultaneously.
• Threshold: +22 dBu to -8 dBu
• Ratio: 1:1 to 4 :1
• Output gain: 0 dB to +7 dB
• Attack time: Approximately 25 ms
• Release time: Approximately 300 ms
NOTE
Avoid setting the compression too high; since the resulting
higher average output level may lead to feedback.
i [PHANTOM +48V] switch and indicator
This switch toggles phantom power on and off. Turn this
switch on ( ) to supply DC+48 V to the XLR input jacks.
The indicator lights when this switch is on. Turn this switch
on when using one or more phantom-powered condenser
microphones.
NOTICE
• Be sure to leave this switch off ( ) if you do not need
phantom power.
• When turning phantom power on ( ), pay careful
attention to the following to prevent damage or noise in
the mixing console or connected equipment.
- Turn this switch off if equipment that does not use
phantom power is connected to the XLR input jacks.
- Do not disconnect XLR connector cables while this
switch is on.
- Set output controls such as the [STEREO] master
fader and the [GROUP] fader to their minimum levels
before turning phantom power on or off.
o [LINE /USB ] switch (XU models)
Switches the audio source input on CH19/20 USB IN {CH15/
16 USB IN} {CH11/12USB IN} between the [LINE] stereo
input jack and the [USB 2.0] jack.
NOTE
The volume input from computers through [USB 2.0] jack can
be adjusted by Attenuator Function. Please see Attenuator
Function (page 28).
[PAD] switch Range
ON -6 dB to +38 dB
OFF +20 dB to +64 dB
MG20XU/MG20: 1 – 12 13/14 – 19/20
MG16XU/MG16: 1 – 8 9/10 – 11/12
MG12XU/MG12: 1 – 4 5/6 – 7/8