BOSSCO CL-50 User manual

UBOSsS
CL-
COMPRESSOR
LIMITER
== Owner’s Manual
- O80Ss
CL-50
compressor
LIMITER
eri
ag ° 4 2
°
fa S 7 ig N oN 7 N
3 7 x MIN MAX OF] 0
THRESHOLD RELEASE
.————COMPRESSOR LIMITER COMP POWER

Thank
you,
and
congratulations
on
your
choice
of
the
BOSS
[CL-50]
Compressor
Limiter.
To
make
sure
you
enjoy
the
complete
range
of
func-
tions
the
CL-50
provides,
and
to
ensure
satisfaction
for
years
to
come,
please
take
the
time
to
completely
read
this
Owner’s
Manual
before
starting
out.
@ FEATURES
The unit is a high-performance dynamic processor,
which in addition to its compressor/limiter func-
tions, also provides a gate function.
A very favorable SN ratio and low distortion are
assured thanks to the superior performance VCA
that was selected for this unit. As a result, there
is almost no deterioration in sound quality.
The unit's operating status and the effect of various
settings can be easily contirmed by viewing the
Gain Reduction Indicators.
The unit adapts readily to a wide range of applica-
tions since it is equipped with a Detector In Jack,
as well as Stereo Link Jack. The former allows for
the operational characteristics of the unit to change
in correspondence with the signals arriving from
the external source, The latter provides for the
synchronization of two CL-50s,
By employing the optional RAD - 50 Rack Mount
Adaptor, two units can be used together as a set
which tits into a |U space in a standard 19-inch
rack.
Copyright ©1990 by BOSS CORPORATION
All rights reserved. No part of this publication may be reproduced in
any form without the permission of ROLAND CORPORATION.

M@ IMPORTANT NOTES
When using an AC adaptor, be sure that it is one
supplied by the manufacturer, Use of any other
power adaptor could result in damage, malfunction,
or electric shock,
Power Supply
@ When making any connections with other devices,
always turn off the power to all equipment first:
this will help prevent damage or malfunction,
® Do not use this unit on the same power circuit
with any device that will generate line noise, such
as a motor or variable lighting system.
@ The power supply required for this unit is shown
on its nameplate, Ensure that the line voltage of
your installation meets this requirement,
@ Avoid damaging the power cord; do not step on
it, place heavy objects on it etc.
@ When disconnecting the AC adaptor from the out-
let, grasp the plug itself, never pull on the cord,
@ |f the unit is to remain unused for a long period of
time, unplug the power cord.
@ Do not subject the unit to temperature extremes
(eg, direct sunlight in an enclosed vehicle),
Avoid using or storing the unit in dusty or humid
areas or areas that are subject to high vibration
levels.
@ Using the unit near power amplifiers (or other
equipment containing large transformers) may
induce hum,
®@® This unit may interfere with radio and television
reception, Do not use this unit in the vicinity of
such receivers.
Maintenance
@ For everyday cleaning wipe the unit with a soft,
dry cloth (or one that has been slightly dampened
with water), To remove stubborn dirt, use a mild
neutral detergent, Afterwards, be sure to wipe the
unit thoroughly with a soft, dry cloth.
Never use benzene, thinners, alcohol or solvents
of any kind, to avoid the risk of discoloration and/
or deformation,
Additional Precautions
@ Protect the unit from strong impact.
@ Do not allow objects or liquids of any kind to pen-
etrate the unit. In the event of such an occur-
rence, discontinue use immediately, Contact qual-
ified service personnel as soon as possible,
Never strike or apply strong pressure to the dis-
play.
Before using the unit in a foreign country, consult
with qualified service personnel,
Should a malfunction occur (or if you suspect
there is a problem) discontinue use immediately,
Contact qualified service personnel as soon as
possible,

Mi
WHAT
THE
CL-50
CAN
DO
The CL-~- 50 is equipped to provide the features of
three types of devices: Compressor, Limiter, and
Gate. You will be able to use these features most
effectively after first gaining a good understanding of
how they work,
<Compressor/Limiter >
While both of these act in compressing the input sig-
nal, factors such as the Threshold Level, Ratio, and
the intended purpose result in their differentiation,
Compressor:
Takes
a
divergent
signal
and
compres-
ses
it,
and
when
necessary,
averages
it
to
create
sound
of
an
amplitude
that
is
perceived
acoustically
as
being
well-controlled.
Limiter:
Serves
in
protecting
equipment
from
exces-
sively
powerful
input,
and
in
preventing
distortion.
@ Threshold Level
When
using
the
Compressor/Limiter,
the
point
at
which
it
is
to
take
effect
is
called
the
"Threshold
Level".
All
signals
of
a
level
lower
than
the
Threshold
level
are
output
without
compression.
@ Ratio
The rate of compression to be applied with respect to
the input signal is known as the “Ratio”. For exam-
ple, in a situation where a signal 10dB higher than a
given signal is input, but at output there is only a 5
dB increase produced, there is a ratio of 10dB:5dB,
or 2:1.
<Threshold Level and Ratio
Output Level (dBm)
Ratio= a:b
Input Level (dBm)
@ Attack Time
The
Attack
Time
is
the
length
of
time
it
takes
for
compression
to
reach
its
set
value,
from
the
instant
the
signal
being
input
has
surpassed
the
Threshold
Level.
@ Release Time
The
Release
Time
is
the
length
of
time
it
takes
for
compression
to
be
released
and
the
signal
to
revert
to
normal,
from
the
moment
the
signal
drops
below
the
Threshold
Level.
<Attack Time and Release Time>
“- input Level
Level (dBm)
--~- Threshold Level
Output Level
Attack Time
Release Time
Time
<Gate>
Acts
in
muting
signals
that
are
below
than
the
Thresh-
old
Level,
This
can
conveniently
be
used
to
eliminate
noise
during
periods
of
silence,
or
to
mute
unwanted
sound
while
using
microphones,
@ Gate Threshold Level
The
level
at
which
the
Gate
will
start
taking
effect
is
known as the "Threshold Level”.
@ Decay Time
When
the
input
signal
fails
below
the
Threshold
Level,
the
sound
is
muted.
In
actuality,
a
certain
length
of
time
is
allowed
to
pass
before
the
sound
is
cut
off;
this
is
called
the
"Decay
Time”
(attenuating
time)
.

Mi MAKING CONNECTIONS
AC ADAPTOR
(BOSS BRA SERIES : Supplied )
FOOT SWITCH
(FS-5L : Optional)
Refer to “Example Settings”
rooodboooscobors Rosesoobel a
GUITAR AMPLIFIER ey GUITAR AMPLIFIER D
CcL-50 (in stereo setup
OO
—
TAPE. RECORDER