Page 1
OWNER’S MANUAL
Thank you, and congratulations on your choice of the Roland Keyboard Amplifier KC-550/
KC-350.
These sections provide important information concerning the proper operation of the unit.
Additionally, in order to feel assured that you have gained a good grasp of every feature
provided by your new unit, Owner’s manual should be read in its entirety. The manual
should be saved and kept on hand as a convenient reference.
Before using this unit, carefully read the sections entitled:
• IMPORTANT SAFETY INSTRUCTIONS (p. 2)
• USING THE UNIT SAFELY (p. 3–p. 4)
• IMPORTANT NOTES (p. 5)
Main Features
• This monitor-speaker amplifier is designed to provide high-quality sound for a variety of
sources, including digital keyboards and sound modules.
• The amps’ two-way speaker systems consist of a 38 cm (15-inch) speaker (in the KC-550;
the KC-350 includes a 30 cm [12-inch] speaker) and horn/tweeter. These amps feature
high-power output as well, with the KC-550 outputting 180 watts and the KC-350 120
watts.
• The input section features a four-channel stereo mixer. CH 1 is provided with an XLR
connector in addition to supporting mic input.
• CH 4 includes a select switch that lets you choose the destination for output. This feature
rounds out the monitor functions.
• The KC-550/KC-350 is equipped with a three-band equalizer. Moreover, when combined
with the SHAPE switch, even more tonal variations are possible.
• Features a SUBWOOFER OUT jack, allowing connection of a powered subwoofer for
playback of even more impressive bass.
• Provided with an RCA phono type AUX IN jack, making it easy to connect devices such
as CD and MD players.
• Equipped with line outs, making it convenient to connect to an external mixer or recorder.
• Equipped with STEREO LINK function. Stereo playback is enabled simply by connecting
two KC-550 or KC-350 units with a single audio cable (phone type).
Copyright © 2003 ROLAND CORPORATION
All rights reserved. No part of this publication may be reproduced in any form without the
written permission of ROLAND CORPORATION.
Page 2
IMPORTANT SAFETY INSTRUCTIONS
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
ATTENTION: RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK).
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
The lightning flash with arrowhead symbol, within an
equilateral triangle, is intended to alert the user to the
presence of uninsulated “dangerous voltage” within the
product’s enclosure that may be of sufficient magnitude to
constitute a risk of electric shock to persons.
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the product.
INSTRUCTIONS PERTAINING TO A RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS.
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
WARNING - When using electric products, basic precautions should always be followed, including the following:
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any of the ventilation openings. Install in
accordance with the manufacturers instructions.
8. Do not install near any heat sources such as radiators,
heat registers, stoves, or other apparatus (including
amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades with
one wider than the other. A grounding type plug has two
blades and a third grounding prong. The wide blade or the
third prong are provided for your safety. When the provided
plug does not fit into your outlet, consult an electrician for
replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched
particularly at plugs, convenience receptacles, and the
point where they exit from the apparatus.
11. Only use attachments/accessories specified by the
manufacturer.
12. Never use with a cart, stand, tripod, bracket,
or table except as specified by the
manufacturer, or sold with the apparatus.
When a cart is used, use caution when
moving the cart/apparatus combination to
avoid injury from tip-over.
13. Unplug this apparatus during lightning storms or when
unused for long periods of time.
14. Refer all servicing to qualified service personnel. Servicing
is required when the apparatus has been damaged in any
way, such as power-supply cord or plug is damaged, liquid
has been spilled or objects have fallen into the apparatus,
the apparatus has been exposed to rain or moisture, does
not operate normally, or has been dropped.
For the U.K.
WARNING:
IMPORTANT:
As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying
the terminals in your plug, proceed as follows:
The wire which is coloured GREEN-AND-YELLOW must be connected to the terminal in the plug which is marked by the
letter E or by the safety earth symbol or coloured GREEN or GREEN-AND-YELLOW.
The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK.
The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED.
THIS APPARATUS MUST BE EARTHED
THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE.
GREEN-AND-YELLOW: EARTH, BLUE: NEUTRAL, BROWN: LIVE
2
Page 3
USING THE UNIT SAFELY
Used for instructions intended to alert
the user to the risk of death or severe
injury should the unit be used
improperly.
Used for instructions intended to alert
the user to the risk of injury or material
damage should the unit be used
improperly.
* Material damage refers to damage or
other adverse effects caused with
respect to the home and all its
furnishings, as well to domestic
animals or pets.
001
• Before using this unit, make sure to read the
instructions below, and the Owner’s Manual.
..........................................................................................................
002a
• Do not open or perform any internal modifications on the unit.
..........................................................................................................
003
• Do not attempt to repair the unit, or replace parts
within it (except when this manual provides
specific instructions directing you to do so). Refer
all servicing to your retailer, the nearest Roland
Service Center, or an authorized Roland
distributor, as listed on the “Information” page.
..........................................................................................................
004
• Never use or store the unit in places that are:
• Subject to temperature extremes (e.g., direct
sunlight in an enclosed vehicle, near a heating
duct, on top of heat-generating equipment); or
are
• Damp (e.g., baths, washrooms, on wet floors);
or are
• Humid; or are
• Exposed to rain; or are
• Dusty; or are
• Subject to high levels of vibration.
..........................................................................................................
The symbol alerts the user to important instructions
or warnings.The specific meaning of the symbol is
determined by the design contained within the
triangle. In the case of the symbol at left, it is used for
general cautions, warnings, or alerts to danger.
The symbol alerts the user to items that must never
be carried out (are forbidden). The specific thing that
must not be done is indicated by the design contained
within the circle. In the case of the symbol at left, it
means that the unit must never be disassembled.
The ● symbol alerts the user to things that must be
carried out. The specific thing that must be done is
indicated by the design contained within the circle. In
the case of the symbol at left, it means that the powercord plug must be unplugged from the outlet.
007
• Make sure you always have the unit placed so it is
level and sure to remain stable. Never place it on
stands that could wobble, or on inclined surfaces.
..........................................................................................................
008a
• The unit should be connected to a power supply
only of the type described in the operating instructions, or as marked on the unit.
..........................................................................................................
009
• Do not excessively twist or bend the power cord,
nor place heavy objects on it. Doing so can
damage the cord, producing severed elements and
short circuits. Damaged cords are fire and shock
hazards!
..........................................................................................................
010
• This unit, either alone or in combination with an
amplifier and headphones or speakers, may be
capable of producing sound levels that could
cause permanent hearing loss. Do not operate for
a long period of time at a high volume level, or at
a level that is uncomfortable. If you experience
any hearing loss or ringing in the ears, you should
immediately stop using the unit, and consult an
audiologist.
..........................................................................................................
011
• Do not allow any objects (e.g., flammable material,
coins, pins); or liquids of any kind (water, soft
drinks, etc.) to penetrate the unit.
..........................................................................................................
3
Page 4
012a:
• Immediately turn the power off, remove the
power cord from the outlet, and request servicing
by your retailer, the nearest Roland Service
Center, or an authorized Roland distributor, as
listed on the “Information” page when:
• The power-supply cord, or the plug has been
damaged; or
• If smoke or unusual odor occurs
• Objects have fallen into, or liquid has been
spilled onto the unit; or
• The unit has been exposed to rain (or otherwise
has become wet); or
• The unit does not appear to operate normally or
exhibits a marked change in performance.
..........................................................................................................
013
• In households with small children, an adult
should provide supervision until the child is
capable of following all the rules essential for the
safe operation of the unit.
..........................................................................................................
014
• Protect the unit from strong impact.
(Do not drop it!)
..........................................................................................................
015
• Do not force the unit’s power-supply cord to share
an outlet with an unreasonable number of other
devices. Be especially careful when using
extension cords—the total power used by all
devices you have connected to the extension
cord’s outlet must never exceed the power rating
(watts/amperes) for the extension cord. Excessive
loads can cause the insulation on the cord to heat
up and eventually melt through.
..........................................................................................................
016
• Before using the unit in a foreign country, consult
with your retailer, the nearest Roland Service
Center, or an authorized Roland distributor, as
listed on the “Information” page.
..........................................................................................................
026
• To reduce the risk of fire or electric shock, do not
expose this apparatus to rain or moisture and
objects filled with liquids, such as vases, should
not be placed on this apparatus.
..........................................................................................................
101a
• The unit should be located so that its location or
position does not interfere with its proper ventilation.
..........................................................................................................
102a
• Always grasp only the plug on the power-supply
cord when plugging into, or unplugging from an
outlet.
..........................................................................................................
103a:
• Any accumulation of dust between the power
plug and the power outlet can result in poor
insulation and lead to fire. Periodically wipe away
such dust with a dry cloth. Also, disconnect the
power plug from the power outlet whenever the
unit is to remain unused for an extended period of
time.
..........................................................................................................
104
• Try to prevent cords and cables from becoming
entangled. Also, all cords and cables should be
placed so they are out of the reach of children.
..........................................................................................................
105b
KC-550
• If the unit could become a hazard if it moves, all
caster wheels should be removed once the unit has
been placed at the place of installation, or has been
loaded onto a vehicle.
..........................................................................................................
106
• Never climb on top of, nor place heavy objects on
the unit.
..........................................................................................................
107a
• Never handle the power cord or its plug with wet
hands when plugging into, or unplugging from,
an outlet.
..........................................................................................................
108a
• Before moving the unit, disconnect the power
plug from the outlet, and pull out all cords from
external devices.
..........................................................................................................
109a
• Before cleaning the unit, turn off the power and
unplug the power cord from the outlet.
..........................................................................................................
110a
• Whenever you suspect the possibility of lightning
in your area, pull the plug on the power cord out
of the outlet.
..........................................................................................................
4
Page 5
IMPORTANT NOTES
291b
In addition to the items listed under “IMPORTANT SAFETY INSTRUCTIONS” and “USING THE UNIT SAFELY” on pages 2,
3 and 4, please read and observe the following:
Power Supply
301
• Do not use this unit on the same power circuit with any device
that will generate line noise (such as an electric motor or variable
lighting system).
307
• Before connecting this unit to other devices, turn off the power to
all units. This will help prevent malfunctions and/or damage to
speakers or other devices.
308
• Although the LEDs are switched off when the POWER switch is
switched off, this does not mean that the unit has been
completely disconnected from the source of power. If you need to
turn off the power completely, first turn off the POWER switch,
then unplug the power cord from the power outlet. For this
reason, the outlet into which you choose to connect the power
cord’s plug should be one that is within easy reach.
Placement
351
• Using the unit near power amplifiers (or other equipment
containing large power transformers) may induce hum. To
alleviate the problem, change the orientation of this unit; or move
it farther away from the source of interference.
352a
• This device may interfere with radio and television reception. Do
not use this device in the vicinity of such receivers.
352b
• Noise may be produced if wireless communications devices, such
as cell phones, are operated in the vicinity of this unit. Such noise
could occur when receiving or initiating a call, or while
conversing. Should you experience such problems, you should
relocate such wireless devices so they are at a greater distance
from this unit, or switch them off.
354b
• Do not expose the unit to direct sunlight, place it near devices
that radiate heat, leave it inside an enclosed vehicle, or otherwise
subject it to temperature extremes. Also, do not allow lighting
devices that normally are used while their light source is very
close to the unit (such as a piano light), or powerful spotlights to
shine upon the same area of the unit for extended periods of time.
Excessive heat can deform or discolor the unit.
355b
• When moved from one location to another where the temperature and/or humidity is very different, water droplets (condensation) may form inside the unit. Damage or malfunction may
result if you attempt to use the unit in this condition. Therefore,
before using the unit, you must allow it to stand for several
hours, until the condensation has completely evaporated.
356
• Do not allow rubber, vinyl, or similar materials to remain on the
unit for long periods of time. Such objects can discolor or
otherwise harmfully affect the finish.
357
• Do not put anything that contains water (e.g., flower vases) on
the unit. Also, avoid the use of insecticides, perfumes, alcohol,
nail polish, spray cans, etc., near the unit. Swiftly wipe away any
liquid that spills on the unit using a dry, soft cloth.
359
•Do not paste stickers, decals, or the like to this instrument. Peeling
such matter off the instrument may damage the exterior finish.
• Do not allow objects to remain on top of the unit while it is in
operation.
Maintenance
401a
• 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 cloth impregnated with a mild, non-abrasive detergent. Afterwards, be sure to wipe the unit thoroughly with a soft, dry cloth.
402
• Never use benzine, thinners, alcohol or solvents of any kind, to
avoid the possibility of discoloration and/or deformation.
• For routine care of the carpeted surfaces, use a brush with stiff bristles.
Additional Precautions
553
• Use a reasonable amount of care when using the unit’s buttons,
sliders, or other controls; and when using its jacks and
connectors. Rough handling can lead to malfunctions.
556
• When connecting / disconnecting all cables, grasp the connector
itself—never pull on the cable. This way you will avoid causing
shorts, or damage to the cable’s internal elements.
557
•A small amount of heat will radiate from the unit during normal
operation.
558a
• To avoid disturbing your neighbors, try to keep the unit’s volume
at reasonable levels. You may prefer to use headphones, so you
do not need to be concerned about those around you (especially
when it is late at night).
559a
• When you need to transport the unit, package it in the box
(including padding) that it came in, if possible. Otherwise, you
will need to use equivalent packaging materials.
562
•Use a cable from Roland to make the connection. If using some other
make of connection cable, please note the following precautions.
• Some connection cables contain resistors. Do not use cables
that incorporate resistors for connecting to this unit. The use
of such cables can cause the sound level to be extremely low,
or impossible to hear. For information on cable specifications,
contact the manufacturer of the cable.
• When transporting and storing the KC-550/KC-350, be sure to
secure the AC cord to the cord hook on the rear of the main unit.
5
Page 6
Panel Descriptions
Control Section
fig.20
1 2
1. CHANNEL CONTROL
Stereo 4-channel mixing is offered by the CHANNEL
CONTROL
* When using in “Stereo Link” configuration, refer to “Stereo
Link” (p. 12).
CH 1, CH 2, CH 3
These adjust the volume levels for CH 1 , CH 2 and CH 3 .
CH 1 accepts the mic input.
CH 4
This adjusts the volume level for CH 4 .
CH 4 includes a select switch that lets you choose the
destination for output.
OUTPUT SEL (output select) Switch
This switch selects the combination of outputs—
headphones, speakers, and line outs—to which signals
input to
Output is only through
the headphones. No
signals are output to
the internal speakers
and Line Out.
s.
CH 4
are sent.
Output is through the headphones and the internal
speakers. No signals are output to Line Out.
Output is through
the headphones, the
internal speakers,
and Line Out.
3 4
* The
OUTPUT SEL
following.
: Select this position when you wish to listen to guide
clicks or a rhythm machine (for example) through
headphones, without output to the internal or any
external speakers.
: This can be a handy function when you want to use the
amplifier as a fold back monitor during a live
performance.
This is effective in preventing the loop noise that may
occur at times such as when the
Out on the KC-550/KC-350 are both connected to a
mixer.
: Use
CH 4
switch is convenient in situations like the
CH 4
input and Line
equally with
CH 1
through
CH 3
.
PHONES
PHONES VOLUME Knob
This knob adjusts the headphone volume.
* The PHONES VOLUME knob affects only the headphone
output.
PHONES Jack
This is for connecting headphones.
* The amplifier’s speakers work even when headphones are
connected.
* Before plugging in or unplugging headphones, be sure to place
the PHONES VOLUME knob at 0.
* The MASTER CONTROL (Equalizer, SHAPE switch and
VOLUME knob) do not affect the headphone output.
6
Page 7
2. MASTER CONTROL
EQUALIZER
The KC-550/KC-350 comes with a three-band equalizer.
LOW Knob
This adjusts the tone of the bass range.
MIDDLE Knob
This adjusts the tone of the middle range.
HIGH Knob
This adjusts the tone of the treble range.
* The equalizer (controlled with the LOW , MIDDLE , and HIGH
knobs) affects only the output from SUBWOOFER OUT and
the speakers.
Panel Descriptions
SHAPE Switch
When switched on, this provides a boost in the upper and
lower ranges.
It can be conveniently used to improve the sound quality
at low volumes, or to give the sound a greater sense of
clarity.
* The
SHAPE
switch affects only the output from the speakers.
VOLUME Knob
This adjusts the total volume level of the unit’s internal
speaker. The SUBWOOFER OUT output is also changed.
* The VOLUME knob do not affect the line outs.
3. POWER Indicator
This indicator lights when the unit is turned on.
4. POWER Switch
This switches the power on and off.
* Before turning the power on or off, be sure to put the VOLUME
knob at 0.
* This unit is equipped with a protection circuit. A brief interval
(a few seconds) after power up is required before the unit will
operate normally.
* Refer to p. 11 for the order in which to turn the power to
connected devices on and off.
7
Page 8
Panel Descriptions
Jack Panel
fig.21
8
KC-550 only
CHANNEL INPUT
5. CH 1 Input Jacks
In addition to a standard jack, this channel is equipped with
a balanced XLR connector, useful for connecting mics.
Use this for connecting mics, keyboards, sound modules, and
other devices.
Input levels ranging from mic input (-50 dBu) to line level
(-20 dBu) are accepted.
6
57
91011
7. LINE OUT
LINE OUT Jacks
(XLR-type connectors are featured only on the KC-550)
Connect a mixer or recording device to either (or both) of
these pairs of outputs. There are two types of connectors: an
XLR type and an unbalanced TRS 1/4" phone jack on the KC-
550. The TRS 1/4” phone jack are unbalanced type. Use the
one appropriate for the equipment you’re connecting.
This output jack provides +4 dBu line level output.
6. CH 2, CH 3 and CH 4 Input Jacks
Use these for connecting keyboards, sound modules, and
other devices.
They accept line level input (-20 dBu).
You can select the output for signals input to CH 4 (p. 6).
If you’re making a mono connection, connect to the L
(MONO) phone jack.
*
MASTER CONTROL
VOLUME knob) do not affect LINE OUT.
(equalizer, SHAPE switch and
8. GND LIFT Switch (KC-550 only)
This selects whether the XLR-type LINE OUT jacks are
grounded or not.
If you encounter noise problems that are possibly caused by
a ground loop, try changing the switch position to alleviate
the problem.
8
Page 9
Panel Descriptions
9. STEREO LINK
Stereo playback is enabled simply by connecting two KC-550
or KC-350 units with a single audio cable (phone type).
* For details on the Stereo Link function, refer to “Stereo Link”
(p. 12).
STEREO LINK OUT Jack
Connect this jack to the STEREO LINK IN jack on a sub (L)
KC-550/KC-350 when using a Stereo Link configuration.
This output jack provides 0 dBu line level output.
When a cable is connected to the STEREO LINK OUT jack,
the right-channel input signals are output from the internal
speakers. The left-channel input signals are output from the
STEREO LINK OUT jack to the other KC-550/KC-350.
STEREO LINK IN Jack
Connect this jack to the STEREO LINK OUT jack on the main
(R) unit (the other KC-550/KC-350) when using a Stereo Link
configuration.
This accepts level input of 0 dBu.
10. SUBWOOFER OUT Jack
This lets you play even more powerful bass by connecting a
powered subwoofer.
Provides full-range output, at an output level of +4 dBu.
You can use the MASTER CONTROL knobs (LOW, MIDDLE,
HIGH, and VOLUME) to adjust the tone and volume level.
* SHAPE switch do not affect SUBWOOFER OUT.
11. AUX IN Jacks
These are RCA phono type input jacks.
You use these to connect equipment such as CD and MD
players, and have them sound along with the equipment
connected to CH 1 through CH 4.
They accept level input of -10 dBu.
* To adjust the volume level of equipment connected to the AUX
IN jacks, use the controls on such equipment.
Only the STEREO LINK IN input signals are output from the
internal speakers.
9
Page 10
Connect your KC-550/KC-350
Refer to the following diagram and connect the KC-550/KC-350 to the external equipment you are using.
fig.30-1
Control SectionJack Panel
or
INPUT
KC-550 only
Rhythm Machine
Mixer
OUTPUT
Keyboard
Here is an example of a setup that makes full use of the KC550/KC-350’s mixer and monitor functions.
A mic is input to CH 1, which accepts mic level input.
Connect a keyboard, recorder, or other sound-generating
device to the CH 2, CH 3 and CH 4 inputs.
The KC-550’s line outputs include both XLR-type and 1/4"
phone connectors. Furthermore, both types can be used
simultaneously.
* To prevent malfunction and/or damage to speakers or other
devices, always turn down the volume, and turn off the power
on all devices before making any connections.
Set all of the KC-550/KC-350’s channel volume knobs (CH 1,
CH 2, CH 3 and CH 4) as well as the VOLUME knob to zero.
Mic
Stereo
Headphone
Stereo Link (P .12)
OUTPUT
(With built-in amp)
INPUT
Subwoofer
CD Player
* The pin assignment for the XLR type connectors is as shown
below. Before making any connections, make sure that this pin
assignment is compatible with that of all your other devices.
fig.31
* When connection cables with resistors are used, the volume level
of equipment connected to the inputs (CH 1 through CH 4,
AUX IN and STEREO LINK IN) may be low.
If this happens, use connection cables that do not contain
resistors, such as those from the Roland PCS series.
10
* Howling could be produced depending on the location of
microphones relative to speakers. This can be remedied by:
1. Changing the orientation of the microphone.
2. Relocating microphone at a greater distance from speakers.
3. Lowering volume levels.
Page 11
Connect your KC-550/KC-350
Switching the Power On and Off
Once the connections have been completed, turn on power to
your various devices in the order specified. By turning on
devices in the wrong order, you risk causing malfunction
and/or damage to speakers and other devices.
* Before switching off the power, lower the volume on each of the
devices in your system and then TURN OFF the devices in the
reverse order to which they were switched on.
1. Make sure that all volume controls on the KC-550/KC-
350 and connected devices are set to 0.
2. Turn on all the devices connected to the KC-550/KC350’s input jacks (CH 1 through CH 4 and AUX IN).
3. Turn on the KC-550/KC-350.
4. Switch on any equipment connected to the KC-550/KC-
350’s LINE OUT or SUBWOOFER OUT jacks.
5. Adjust the volume levels for the devices.
* This unit is equipped with a protection circuit. A brief interval
(a few seconds) after power up is required before the unit will
operate normally. For protection from sudden big sound, always
make sure to have the volume level turned down before
switching on power. Even with the volume all the way down,
you may still hear some sound when the power is switched on,
but this is normal, and does not indicate a malfunction.
About the Volume-level Settings
In order to get optimum sound from the KC-550/KC-350
when performing, set the volume as described below.
1. Operate the CH 1 through CH 4 volume knobs to adjust
the volume level for CH 1 through CH 4.
fig.11
Adjust the volume balance for CH 1 through CH 4 at this
time.
* To adjust the volume level of equipment connected to the AUX
IN jacks, use the controls on such equipment.
2. Adjust the LOW, MIDDLE and HIGH knobs to obtain the
sound quality you want.
3. Use the VOLUME knob to adjust the overall volume
level.
fig.12
* If the sound is distorted, lower the
knobs, VOLUME knob and/or the volume knobs for devices
connected to the input jacks (
CH 1
CH 1
through
through
CH 4
CH 4
and
volume
AUX IN
11
).
Page 12
Connect your KC-550/KC-350
Stereo Link
Stereo playback is enabled simply by connecting two KC-550 or KC-350 units with a single audio cable (phone type).
This function is called “Stereo Link.” As the channel control section is designed to accept stereo signals, connection of sound
sources is needed only at the main unit, thus enabling channel volumes to be centrally controlled on the main unit.
The right-channel signals are output from the speakers in the main unit, while the left-channel signals are output from the
speakers in the sub unit (the other KC-550/KC-350).
fig.30-2
Keyboard
Sub (L-channel signals)
IN
Connections
When using a Stereo Link configuration, connect all peripheral
equipment to the main unit. Do not connect to any input/
output jacks on the sub unit other than
* Before making the connections, be sure that the volume setting
of the VOLUME knob for both amplifiers is set to “0.”
STEREO LINK IN
.
Switching the power on or off
Once the connections have been completed, turn on power to
your various devices in the order specified. By turning on
devices in the wrong order, you risk causing malfunction
and/or damage to speakers and other devices.
Main (R-channel signals)
OUT
About the Volume and Tone Settings
Adjust the Main (R) and Sub (L) volume levels separately
using their VOLUME knobs.
* You can make each unit's equalizer (LOW, MIDDLE and HIGH
knobs), SHAPE switch, VOLUME knob, and MAIN (R) and
SUB (L) settings independently.
Basically, they should be set to the same positions, but you can
adjust each one as necessary to suit the needs of a particular
setup.
1. Turn on the devices connected to CH 1 through CH 4.
2. Turn on the main KC-550/KC-350 amplifier.
3. Turn on the sub KC-550/KC-350 amplifier.
4. Turn on the devices connected to LINE OUT or
SUBWOOFER OUT.
5. Adjust the volume levels on all devices.
Before switching off the power, lower the volume on each of
the devices in your system, then TURN OFF the devices in
the reverse order of that used when switching them on.
12
Page 13
Proper Use of the Casters
The KC-550 is equipped with casters, which make it easier to transport.
Attaching and Removing the Casters
You can attach or remove the casters as shown in the following figure.
Be sure to remove all the casters when accidental movement may be dangerous, such as when setting up the KC-550/
KC-350 on stage, or when transporting it in a vehicle.
This is a heavy piece of equipment. To prevent injury caused by the unit overturning or being dropped, two or more
people should work together when carrying the unit.
If casters have been attached to the amp, make sure it is used only on a stable, level surface.
fig.40
Block Diagram
fig.50
CH1
BALANCED
CH1
L/R
CH 1 VR
CH2
L/R
CH 2 VR
CH3
L/R
CH 3 VR
CH4
L/R
OUTPUT SEL
CH 4 VR
AUX IN
L/R
L ch Input
LINK IN
Only
PHONES
SPEAKER
LINE OUT
MIDDLE
HIGH
LOW
EQUALIZER
STEREO LINK USE: R ch Only
OTHER: L ch & R ch Mix
VOLUME
L ch Output Only
SHAPE
SHAPE
HPF
POWER AMP
VOLUME
TWEETER
WOOFER
SUBWOOFER OUT
KC-550 only
LINE OUT
XLR
L/R
LINE OUT
L/R
PHONES
(STEREO)
LINK OUT
13
Page 14
Main Specifications
KC-550:
STEREO MIXING KEYBOARD AMPLIFIER SPECIFICATIONS
Rated Power Output
180 W
Nominal Input Level (1 kHz)
Channel 1 (MIC/LINE): -50 – -20 dBu
Channel 2–4 (LINE): -20 dBu
STEREO LINK INPUT: 0 dBu
AUX IN: -10 dBu
Nominal Output Level (1 kHz)
LINE OUT (XLR type, Phone type): +4 dBu
STEREO LINK OUTPUT: 0 dBu
SUBWOOFER OUT: +4 dBu
*0 dBu = 0.775 Vrms
Speakers
38 cm (15 inches) x 1
Tweeter x 1
Controls
CHANNEL CONTROL
CH 1
VOLUME Knob
CH 2
VOLUME Knob
CH 3
VOLUME Knob
CH 4
VOLUME Knob
OUTPUT SELECT Switch
PHONES VOLUME Knob
MASTER CONTROL
EQUALIZER
LOW Knob
MIDDLE Knob
HIGH Knob
SHAPE Switch
VOLUME Knob
POWER Switch
GND LIFT Switch
Connectors
CH 1 INPUT Jack (XLR type)
CH 1–4 INPUT L (MONO) Jacks (1/4" phone type)
CH 1–4 INPUT R Jacks (1/4" phone type)
LINE OUT L (MONO) Jacks (XLR type, 1/4" phone type)
LINE OUT R Jacks (XLR type, 1/4" phone type)
AUX IN Jacks (RCA phono type)
SUBWOOFER OUT Jack (1/4" phone type)
STEREO LINK OUT Jack (1/4" phone type)
STEREO LINK IN Jack (1/4" phone type)
PHONES Jack (Stereo 1/4" phone type)
Power Supply
AC 117 V, AC 230 V, AC 240 V
Power Consumption
135 W
Dimensions
590 (W) x 445 (D) x 590 (H) mm
23-1/4 (W) x 17-9/16 (D) x 23-1/4 (H) inches (including casters)
590 (W) x 445 (D) x 536 (H) mm
20-1/4 (W) x 21-5/16 (D) x 21-1/8 (H) inches (excluding casters)
Weight
29.0 kg
63 lbs 15 oz
Accessory
Owner’s Manual
Casters
* In the interest of product improvement, the specifications and/or
appearance of this unit are subject to change without prior
notice.
Indicator
POWER
14
Page 15
KC-350:
STEREO MIXING KEYBOARD AMPLIFIER SPECIFICATIONS
Main Specifications
Rated Power Output
120 W
Nominal Input Level (1 kHz)
Channel 1 (MIC/LINE): -50– -20 dBu
Channel 2--4 (LINE): -20 dBu
STEREO LINK INPUT: 0 dBu
AUX IN: -10 dBu
Nominal Output Level (1 kHz)
LINE OUT (Phone type): +4 dBu
STEREO LINK OUTPUT: 0 dBu
SUBWOOFER OUT: +4 dBu
*0 dBu = 0.775 Vrms
Speakers
30 cm (12 inches) x 1
Tweeter x 1
Controls
CHANNEL CONTROL
CH1
VOLUME Knob
CH2
VOLUME Knob
CH3
VOLUME Knob
CH4
VOLUME Knob
OUTPUT SELECT Switch
PHONES VOLUME Knob
MASTER CONTROL
EQUALIZER
LOW Knob
MIDDLE Knob
HIGH Knob
SHAPE Switch
VOLUME Knob
POWER Switch
Connectors
CH 1 INPUT Jack (XLR type)
CH 1–4 INPUT L (MONO) Jacks (1/4" phone type)
CH 1–4 INPUT R Jacks (1/4" phone type)
LINE OUT L (MONO) Jack (1/4" phone type)
LINE OUT R Jack (1/4" phone type)
AUX IN Jacks (RCA phono type)
SUBWOOFER OUT Jack (1/4" phone type)
STEREO LINK OUT Jack (1/4" phone type)
STEREO LINK IN Jack (1/4" phone type)
PHONES Jack (Stereo 1/4" phone type)
Power Supply
AC 117 V, AC 230 V, AC 240 V
Power Consumption
100 W
Dimensions
490 (W) x 385 (D) x 470 (H) mm
19-5/16 (W) x 15-3/16 (D) x 18-9/16 (H) inches
Weight
22.0 kg
48 lbs 9 oz
Accessory
Owner’s Manual
* In the interest of product improvement, the specifications and/or
appearance of this unit are subject to change without prior
notice.
Indicator
POWER
15
Page 16
For EU Countries
This product complies with the requirements of European Directives EMC 89/336/EEC and LVD 73/23/EEC.
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