BOSSCO CL-50 User manual

UBOSsS
CL-
COMPRESSOR
LIMITER
== Owner’s Manual
- O80Ss
CL-50
compressor
LIMITER
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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

Mi
PANEL
DESCRIPTIONS
<Front Panel>
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THRESHOLD
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ATTACK
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RELEASE
OUTPUT tL. COMPRESSOR LIMITER
@ Overload Indicator
Lights when the input signal is too high.
*
This
indicator
lights
6dB
prior
to
the
clipping
point
(level
at
which
distortion
starts
to
occur)
.
@ Input Level Knob
Provides
for
adjustment
of
the
input
level.
Ordinarily
it
should
be
set
to
"0".
However,
in
situations
such
as
those
described
below,
the
knob
may
need
to
be
ad-
justed.,
©
Should
the
Overload
indicator
@
light
too
frequent-
ly,
the
input
level
is
too
high,
Rotate
the
knob
counterclockwise
(4
) until
the
indicator
lights
only
on
input
peaks.
*
if
you
make
a
change
in
this
level
after
settings
for
the
Limiter
and/or
Gate
Thresholds
have
been
made,
the
level
at
which
the
effect
is
applied
will
change.
© Output Level Knob
Used to determine the output level.
@ Gain Reduction Indicators
Provide
indication
of
the
degree
of
compression
(dB)
that
applies
when
the
Compressor/Limiter
is
operat-
ing.
Degree
of
Compression:
Amount
by
which
the
input
signal
is
compressed,
© Limiter: Threshold Knob
This knob provides adjustment of the Threshold Level
(level at which compression starts) for the Compres-
sor/Limiter. When rotated counterclockwise (*)), the
Threshold Level is lowered, and the effect of the
Compressor/Limiter is increased,
@ Limiter: Ratio Knob
This knob is used to adjust the ratio of compression,
that is, the extent to which signals above the Thresh-
old Level will be compressed. When set to “1:1" there
will be no effect obtained from the Compressor/
Limiter,
Compression Ratio: The proportion, in respect to the
input signal, for which compres-
sion takes place.
@ Limiter: Attack Knob
Provides for adjustment of the Attack Time (p.3).
Clockwise rotation ((“) increases the Attack Time,
© Limiter: Release Knob
Provides for adjustment of the Release Time (p. 3).
Clockwise rotation (“) increases the Release Time.
© Gate Indicator
Lights
when
the
input
signal
is
below
the
Gate
Thresh-
old
Level.

@ Gate: Threshold Knob
Adjusts
the
Threshold
Level
for
the
Gate.
Clockwise
rotation
(),
increases
the
Threshoid
Level,
When
set
to
"OFF,"
the
Gate
is
disabled,
@ Gate: Decay Knob
Provides adjustment of the amount of time over which
sound will decay after the input signals have dropped
below the Threshold Level. Clockwise rotation
increases the Decay Time.
® Comp Indicator
Lights when the Comp/Gate is “In”,
whether it is switched “In” or “Out”,
Used to confirm
® Comp/Gate Switch
Used to switch the Comp/Gate “In” or “Out”, When
the switch is In (am), the input signal is routed
through the Compressor/Limiter/Gate before being
output, When the switch is Out (IML) the signal is out-
put directly (bypassed) .
@® Power Indicator
Lights when the Power Switch is turned on, indicating
that the unit is ready for operation.
® Power Switch
Turns power on or off. When “On” (=), the Power
Indicator lights indicating that the unit is ready for
operation,
+ Make sure you turn the volume on your amplifier to
“0” before turning the power switch on.
+ No signal will be output from the unit for a few sec-
onds after power is turned on since a muting circuit
is in effect at that time.

<Rear Panel>
——— LINK
GATE
@® Adaptor Jack
This jack accepts connection of the supplied AC
Adaptor
(BOSS
BRA-120,
220,
240),
specialized
for
use with this unit,
® Comp Remote Jack
This
jack
accepts
connection
of
an
optionally
available
foot
switch
(FS-5L).
When
connected,
you
have
pedal
control
over
switching
the
Comp/Gate
In
and
Out.
When
using
a
foot
switch.
the
Comp
Indicator
®
indicates the In/Out status.
*
If
a
foot
switchis
to
be
used,
the
Comp/Gate
switch
@
on
the
front
pane!
should
first
be
set
to
“In”
(ae).
@® Gate: Stereo Link Jack
When
you
wish
to
use
two
CL-
50s
together,
connec-
tion
is
made
between
this
jack
and
its
counterpart
on
the
other
unit,
This
provides
you
with
identical
response
(manner
in
which
effect
is
applied)
from
the
Gate
of
both
units,
since
they
are
then
interlinked.
@® Comp: Stereo Link Jack
When
using
two
CL-50s
together,
connection
is
made
between
this
jack
and
its
counterpart
on
the
other
unit.
This
provides
you
with
identical
response
(man-
ner
in
which
effect
is
applied)
from
the
Compressor/
Limiter
of
each
unit.
@ Detector In Jack
Used
for
input
when
you
wish
to
have
the
various
effects
(Compressor/Limiter
and/or
Gate)
controlled
in
a
manner
which
correlates
with
the
signal
that
arrives,
“COMP
DETECTOR OUTPUT LEVEL
IN (dBm)
00000
6130SS CL-50 compressor Limiter
MADE IN JAPAN 4,
@ Output Jack
Output is provided from this jack,
® Level Switch
This switch is used to select the rated input/output
level. It should be set to either —10dBm or to +4
dBm,
depending
on
the
level
of
the
device
you
have
connected, Ordinarily, with a guitar or other elec-
tronic musical instrument, you should set it to the “—
10dBm” position.
* A change in the Threshold Level settings @ and ®
will occur as a result of changing the position of
the Level Switch.
@® Input Jack
Input to the unit is made through this jack.
When using the unit without the optional
Rack Mount Adaptor RAD-50, please attach
the rubber feet as shown below.

Mi SETUP EXAMPLES
© Limiter Applications
When
connected
before
a
tape
deck
in
the
recording
chain,
the
CL-50
can
help
you
obtain
clear,
distortion
-
free
recordings,
In
addition,
if
connected
before
an
amplifier,
you
can
pro-
tect
the
amp
from
the
damage
that
could
result
from
extreme
input
levels.
CL-50 compressor Limiter
OVERLOAD
°
© Use of Compressor with Vocals
Since
vocals
can
have
an
extremely
wide
dynamic
range,
it
is
not
that
easy
to
obtain
record-
ings
that
are
free
of
distortion
and
have
a
good
SN
ratio.
However,
if
a
setup
such
as
that
shown
below
is
used,
you
should
be
able
to
get
clear,
distortion
-
free
recordings.
At
the
same
time,
the
perceived
level
of
the
vocal
is
raised,
making
it
seem
more
pronounced,
vestagl COMPRESSOR LIMITER
© Use with Guitar or Bass
lf
used
with
a
guitar
when
“rhythm
playing”
(quick
rhythm
strokes),
you
can
produce
a
crisp,
uniform
sound,
Additionally,
with
bass
and
a
“chopper”
(slap)
technique,
the
peaks
can
be
suppressed,
creating
a
more
balanced
output
from
the
instrument,
CL-50 compressor Limiter

10
O Use as a Noise Gate
When
playing
guitar
or
other
instrument
with
a
large
number
of
effects
units
connected,
there
is
usually
a
proportionate
increase
in
the
amount
of
noise
produced.
However,
if
you
connect
the
CL-50
so
it
is
located
at
the
end
of
the
signal
path,
you
can
effectively
eliminate
un-
wanted
noise
during
moments
when
the
instrument
ts
not
being
played.
CL-SO compressor LIMITER
OVERLOAD
°
9
°
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-ay pard au
INPUT OUTPUT Ln COMPRESSOR LIMITER
© Use as a Signal Gate
When
recording
drums,
using
the
unit
on
the
bass
drum
can
eliminate
any
unwanted
lingering
to
create
a
tighter,
punchier
sound.
In
addition,
when
used
with
a
microphone,
you
can
elim-
inate
stray
sounds
to
obtain
a
cleaner
recording.
oBOss
rPRo
°

Mi FURTHER APPLICATIONS FOR THE CL-50
Since the CL-50 is equipped with Detector In and Stereo Link jacks, it is capable of a wide -
ranging assortment of additional applications.
© Use as a De-esser with Vocals
When you wish to increase the clarity of vocals, one way would be to use an equalizer to
boost the upper range. But this tends to emphasize the raspier elements as well, and can be
unpleasant to listen to. As a solution, you can apply the Limiter to work only at about the 6
kHz frequency band, and eliminate the abrasive sounds without sacrificing any of the clarity,
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© Use in Stereo as a Limiter
When
working
in
stereo,
you
can
use
two
CL
-
50s
in
tandem
to
obtain
identical
results
for
each
channel.
To
do
so,
run
a
connection
between
the
“Comp”
jack
(one
of
the
Stereo
Link
jacks
on
the
rear
panel)
and
its
counterpart
on
the
other
CL-50.
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Mi
SPECIFICATIONS
Rated Input Level: —10dBm/+4dBm
Input Impedance: 1MQ
Rated
Output
Level:
—10dBm/+4dBm
Output Impedance: 6000
Output Load impedance: over 10kQ
Frequency
Response:
(in)5Hz
to
35kHz
(-+3dB)
Residual
Noise:
Less
than
—98dBm(IHF
-
A)
(Level
Switch:
—10dBm)
Total Harmonic Distortion:
Less than 0.05%
Input Gain: —40 to +12dB
Qutput Gain: --40 to +12dB
Detector In:
(Rated Input Level): —10dBm
(Input Impedance): 47kQ
Compressor/Limiter
Threshold Level:
—40 to +5dBm(Level Switch: —10dBm)
—26 to +19dBm(Level Switch: +4dBm)
Retio: 1:1 to 00:1
Attack Time: 50u5 to 200ms
Release Time: 70ms to 1.5s
Gate
Threshold Level:
—oo to —10dBm (Level Switch: —10dBm)
—oco
to
+4dBm
(Level
Switch:
+4dBm)
Decay
Time:
25ms
to
20s
Controls: Input Level, Output Level
Compressor/Limiter: Threshold, Ratio,
Attack, Release
Gate: Threshold, Decay
Switches: Power, COMP In/Out, Level
Indicators:
Power,
COMP
IN/Out,
Overload,
Gain
Reduction,
Gate
Jacks: Input, Output, Detector in, Stereo Link (Comp,
Gate), COMP Remote, AC Adaptor In
Power: 12V AC (BOSS BRA-120, 220, 240)
Current Draw: 450mA
Dimensions: 218(W) x 44(H) x235(D)mm
8—5/8" (W) X1—3/4" (H) x9—5/16" (D)
Weight: 1.4kg / 3!b 20z
Accessories: AC Adaptor BOSS BRA-120, 220, 240
Foot Rubber x4
Options: Rack Mount Adaptor RAD-50
%
Not
attachable
to
Rack
Mount
Adaptor
RAD
-10.
Foot Switch FS-5L
+
In
the
interest
of
product
improvement,
the
specifi-
cations
of
this unit
are
subject
to
change
without
prior
notice.

Information
@When you need repair service, call your local Roland Service Station or the authorized Roland distributor in your
country as shown below.
U.S. A.
Roland Corp US
7200 Dominion Circle
Las Angeles, CA. 90040 - 3647
U.S.A.
3 (213)685 - 5141
CANADA
Roland Canada Music Ltd.
(Head Office)
13880 Mayfield Place
Richmond B. C., V6V 2E4
CANADA
®B (604)270 - 6626
Roland Canada Music Ltd.
9425 Transcanadienne
Service Rd. N.,
St Laurent, Quebec H4S 1V3
CANADA
B (514)335 - 2009
Roland Canada Music Ltd.
346 Watline Avenue,
Mississauga, Ontario L4Z 1X2
CANADA
B (416)890 - 6488
AUSTRALIA
Roland Corporation
(Australia)Pty. Ltd.
(Head Office)
38 Campbell Avenue
Dee Why West. NSW 2099
AUSTRALIA
B (02)982 - 8266
Roland Corporation
(Australia)Pry. Lid.
(Melbourne Office)
50 Garden Street
South Yarra, Victoria 3141
AUSTRALIA
T (03)24) - 1254
NEW ZEALAND
Roland Corporation (NZ)Ltd.
97 Mt. Eden Road, Mt, Eden,
Auckland 3
NEW ZEALAND
& (09)398 - 715
UNITED KINGDOM
Roland(UR)Lid.
Amalgamated Drive
West Cross Centre, Brentford,
Middlesex TW8 9EZ,
UNITED KINGDOM
& (819568 - 4578
WEST GERMANY
Roland Elektronische
Musikinstrumente
Handelsgeselischaft mbH.
Oststrasse 96,
2000 Norderstedt
WEST GERMANY
& 040/52 60 090
BELGIUM/HOLLAND/
LUXEMBOURG
Roland Benelux N. V.
Houtstraat |
B - 2431 Oevel - Westerio
BELGIUM
B14 - 58 45 35
DENMARK
Roland Scandinavia A/S
Langebrogade 6
Box 1937
DK - 1023 Copenhagen K.
DENMARK
731-9531 11
SWEDEN
Roland Scandinavia A/S
DanvikCenter 28 A, 2 tr.
S - 131 30 Nacka,
SWEDEN
2308 - 702 00 20
NORWAY
Roland Scandinavia
Avd. Norge
Lilleakerveien 2
Postboks 95 Lilleaker
N - 0216 Oslo 2
NORWAY
B02 - 73 00 74
FINLAND
Fazer Musik Inc.
Lansituulentie
POB 169
SF - 02101 Espoo
FINLAND
B0- 435011
ITALY
Roland Italy S. P. A.
Viale delle Industrie 8
20020 ARESE MILANO
ITALY
B02 - 93581311
SPAIN
Roland Electronics
de Espafia S. A.
Bolivia 239
08020 Barcelona ~
SPAIN
B 93 - 308 - 1000
SWITZERLAND
Musitronic AG
Gerberstrasse 5, CH - 4410
Liestal
SWITZERLAND
2 061/921 1615
Roland CK (Switzerland) AG
Hauptstrasse 21
CH - 4456 Tenniken
SWITZERLAND
B 061/98 60 55
Repair Service by Musitronic AG
FRANCE
Musikengro
102, Avenue Jean - Jaures
69007 Lyon Cedex 07
FRANCE
B (7)858 - 54 60
Musikengro
(Paris Office)
Centre Region Parisienne
4) rue Charles - Fourier,
94400 Vitry s/Seine
FRANCE
B (1)4680 86 62
AUSTRIA
E. Dematte &Co.
Neu - Rum Siemens - Strasse 4
A - 6021 Innsbruck Box 591
AUSTRIA
& 43(05222)63 451
GREECE
V. Dimitriadis & Co. Ltd.
2 Fidiou Str., GR 106 78
Athens
GREECE
3620130
PORTUGAL
Casa Caius Instrumentos
Musicais Lda.
Rua de Santa Catarina 131
Porto
PORTUGAL
B02 - 38 44 56
HUNGARY
Intermusica Ltd.
Warehouse Area ‘DEPO’
Budapest. P.O. Box 3,
2045 Torokbalint
Budapest
HUNGARY
B 1868905
BRAZIL
Oliver do Brazil S.A.
Instrumentos Musicais
Rua Ludovico Ariostos, 55
Butanta Cep. 05542,
Sao Paulo - SP
BRAZIL
T5511 869 2561
As of JUL. 11. 1990

Roland?
2604022200
with
OUBOSsS
Products of Roland
2604022200 ‘90-B-CA2-12SE(AX)