IMG STAGELINE MCL-204 Instruction Manual Download

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2-Channel Compressor / Limitter

These operating instructions are intended for
users with basic knowledge in audio tech-
nology . Please read the instructions carefully
prior to operation and keep them for later
reference .

All operating elements and connections

described can be found on the fold-out
page 3 .

1 Overview

1.1 Front panel

Control section for channel A (details
see fig . 2)

Control section for channel B, corresponds
to channel A except for the VU-meter (11)
which is situated on the left

POWER switch with power LED

1.2 Control section of channel A

LEDs + / −
LED “+”: the input signal is above the

threshold adjusted and remains un-
changed

LED “−”: the input signal is below the

threshold adjusted and will be attenu-
ated by the expander

Button SC EXT to switch over the side-
chain control signal
button not pressed:

the input signal will also be used as a
control signal for dynamics processing

button pressed:

a signal available at the jack SIDECHAIN
RETURN (34) will be used to control
dynamics processing

When the jack SIDECHAIN RETURN is not
used, the control signal will always be the
input signal .

LEDs −/ 0 /+
LED “+”: the input signal is above the

threshold adjusted and will be modified
by the compressor

LED “−”: the input signal is below the

threshold adjusted und will not be
modified by the compressor

LED “0”: when the button SOFT (7) is

pressed, the input signal will be in the
transition area around the threshold
adjusted and will be modified by the
compressor with reduced compression
ratio

Button SOFT to influence the compressor
control
button not pressed:

hard start of compression

button pressed:

soft start of compression (soft knee)

LED indicators of current level reduction
(compression)

LED LIMITER, will light up when the out-
put signal is limited by the limiter

LED VU-meter for the input signal or out-
put signal of channel A; 0 dB corresponds
to the rated level adjusted with the switch
+4 dBu / −10 dBV (30)

LED VU-meter for the input signal or out-
put signal of channel B; 0 dB corresponds
to the rated level adjusted with the switch
+4 dBu / −10 dBV (30)

Control THRESHOLD to adjust the thresh-
old for the expander: If the input signal

exceeds the threshold, the signal will pass
unchanged . If it falls below the threshold,
it will be attenuated with the RATIO (13)
adjusted . In the position OFF, the signal
will remain unchanged .

Control RATIO to adjust the expansion
ratio; with a ratio of 4 : 1, for example, a
reduction of the input level by 2 dB below
the threshold will result in a reduction of
the output level by 8 dB

Button SC MONITOR to check the con-
trol signal acoustically; if the button is
pressed, instead of the processed signal,
the sidechain control signal will be sent
to the output (28, 29)

Control THRESHOLD for the compressor;
to adjust the threshold at which the signal
is to be compressed

Button SC FILTER to activate the high-pass
filter for the sidechain control signal

Control RATIO to adjust the compression
ratio
position “1”:

no compression

position “4”:

the ratio is 4 : 1; an input level modifi-
cation of 8 dB above the threshold will
result in an output level modification
of 2 dB

position “∞”:

the compressor will operate as a signal
limiter; the output signal will roughly
be limited to the value adjusted with
the control THRESHOLD (15)

Control ATTACK to adjust the attack time
of the compressor

Selector switch MANUAL /AUTO to adjust
the compressor times
button not pressed:

the adjustment of the controls ATTACK
(18) and RELEASE (20) will define the
attack time and the release time of the
compressor

button pressed: