User Manual

Reference
Front & Rear Panels
MG206C-USB/MG166CX-USB/MG166C-USB Owner’s Manual
17
1 MIC Input jacks
These are balanced XLR-type microphone input jacks. (1:
Ground; 2: Hot; 3: Cold)
2 LINE Input Jacks (monaural channels)
These are balanced TRS phone-jack line inputs. (T: Hot; R:
Cold; S: Ground). You can connect either balanced or unbal-
anced phone plugs to these jacks.
3 LINE Input Jacks (stereo channels)
These are unbalanced phone-jack stereo line inputs.
4 LINE Input Jacks (stereo channels)
These are unbalanced stereo RCA pin jacks.
On channels that provide multiple input jack options
only one type of jack can be used at a time.
5 INSERT Jacks
These jacks can be used to insert an external signal-process-
ing device between the equalizer and fader of the corre-
sponding monaural input channel. The INSERT jacks are
ideal for connecting devices such as graphic equalizers,
compressors, or noise filters into the corresponding chan-
nels.
These are TRS (tip, ring, sleeve) phone jacks that
carry both the send and return signal (tip = send/out;
ring = return/in; sleeve = ground). Patching external
devices via an INSERT jack requires a special cable
such as illustrated below (insert cable sold sepa-
rately).
The signal output from the INSERT jacks is
reverse-phased. This should not be a problem
when connecting to an effect unit, but please be
aware of the possibility of phase conflict when
connecting to other types of device. A reversed-
phased signal may result in degraded sound
quality or even complete sound cancellation.
6 GAIN Control
Adjusts the input signal level. To get the best balance
between the S/N ratio and the dynamic range, adjust the gain
so that the PEAK indicator
9 lights only occasionally and
briefly on the highest input transients. The -60 to -16 scale is
the MIC input adjustment range. The -34 to +10 scale is the
LINE input adjustment range.
7 Switch (High-Pass Filter)
This switch toggles the HPF on or off. To turn the HPF on,
press the switch in ( ). The HPF cuts frequencies below
80 Hz (the HPF does not apply to the line inputs of stereo
input channels
3, 4).
8 COMP Control
Adjusts the amount of compression applied to the channel.
As the knob is turned to the right the compression ratio
increases while the output gain is automatically adjusted
accordingly. The result is smoother, more even dynamics
because louder signals are attenuated while the overall level
is boosted.
Avoid setting the compression too high, as the higher
average output level that results may lead to feed-
back.
9 PEAK indicator
The peak level of the post-EQ signal is detected, and the
PEAK indicator lights red when the level reaches 3 dB
below clipping.
For XLR-equipped stereo input channels, both the post-EQ
and post-mic-amp peak levels are detected, and the indicator
lights red if either of these levels reaches 3 dB below clip-
ping.
0 Equalizer (HIGH, MID and LOW)
This three-band equalizer adjusts the channel’s high, mid,
and low frequency bands. Setting the knob to the “▼” posi-
tion produces a flat response in the corresponding band.
Turning the knob to the right boosts the corresponding fre-
quency band, while turning to the left attenuates the band.
The monaural channels have MID frequency controls to
adjust the midrange frequency band.
The following table shows the EQ type, frequency, and max-
imum cut/boost for each of the three bands.
* The monaural channel MID frequency can be adjusted from
250 Hz to 5 kHz. The MID frequency is 2.5 kHz when the
MID frequency control is set at the center position.
NOTE
NOTE
To the INSERT I/O jack
To the input jack of the
external processor
Tip: OUT
Tip: IN
To the output jack of
the external processor
Sleeve (Ground)
Ring: IN
Tip: OUT
CAUTION
Band Type Frequency
Maximum
Cut/Boost
HIGH
Shelving 10 kHz
±15 dBMID Peaking 2.5 kHz*
LOW
Shelving 100 Hz
NOTE