5.1ch Home Theater System
AV Receiver (HT-R557)
Front Speakers (SKF-645F)
Center Speaker (SKC-645C)
Surround Speakers (SKM-645S)
Powered Subwoofer (SKW-540)
Thank you for purchasing an Onkyo 5.1ch Home
Theater System. Please read this manual thoroughly
before making connections and plugging in the unit.
Following the instructions in this manual will enable
you to obtain optimum performance and listening
enjoyment from your new 5.1ch Home Theater Sys-
Please retain this manual for future reference.
Introduction ..................................... 2
Connection .................................... 18
Turning On & First Time Setup..... 35
Playing your AV components ....... 41
Listening to the Radio .................. 43
Enjoying the Listening Modes ..... 47
Advanced Operation ..................... 53
Troubleshooting ............................ 62
Important Safety Instructions
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 dry cloth.
7. Do not block any ventilation openings. Install in
accordance with the manufacturer's instructions.
8. Do not install near any heat sources such as radia-
tors, 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 pro-
vided for your safety. If 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 recepta-
cles, and the point where they exit from the appara-
11. Only use attachments/accessories specified by the
12. Use only with the cart, stand,
tripod, bracket, or table spec-
ified by the manufacturer, or
When a cart is used, use cau-
tion when moving the cart/
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.
15. Damage Requiring Service
Unplug the apparatus from the wall outlet and refer
servicing to qualified service personnel under the
A. When the power-supply cord or plug is damaged,
B. If liquid has been spilled, or objects have fallen
into the apparatus,
C. If the apparatus has been exposed to rain or
D. If the apparatus does not operate normally by
following the operating instructions. Adjust only
those controls that are covered by the operating
instructions as an improper adjustment of other
controls may result in damage and will often
require extensive work by a qualified technician
to restore the apparatus to its normal operation,
E. If the apparatus has been dropped or damaged in
any way, and
F. When the apparatus exhibits a distinct change in
performance this indicates a need for service.
16. Object and Liquid Entry
Never push objects of any kind into the apparatus
through openings as they may touch dangerous volt-
age points or short-out parts that could result in a
fire or electric shock.
The apparatus shall not be exposed to dripping or
splashing and no objects filled with liquids, such as
vases shall be placed on the apparatus.
Don't put candles or other burning objects on top of
Always consider the environmental issues and fol-
low local regulations when disposing of batteries.
18. If you install the apparatus in a built-in installation,
such as a bookcase or rack, ensure that there is ade-
Leave 20 cm (8") of free space at the top and sides
and 10 cm (4") at the rear. The rear edge of the shelf
or board above the apparatus shall be set 10 cm (4")
away from the rear panel or wall, creating a flue-like
gap for warm air to escape.
TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS APPARATUS
TO RAIN OR MOISTURE.
TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK). NO
USER-SERVICEABLE PARTS INSIDE. REFER
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
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 appliance.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
RISQUE DE CHOC ELECTRIQUE
PORTABLE CART WARNING
1. Recording Copyright--Unless it's for personal use
only, recording copyrighted material is illegal with-
out the permission of the copyright holder.
2. AC Fuse--The AC fuse inside the unit is not user-
serviceable. If you cannot turn on the unit, contact
your Onkyo dealer.
3. Care--Occasionally you should dust the unit all
over with a soft cloth. For stubborn stains, use a soft
cloth dampened with a weak solution of mild deter-
gent and water. Dry the unit immediately afterwards
with a clean cloth. Don't use abrasive cloths, thin-
ners, alcohol, or other chemical solvents, because
they may damage the finish or remove the panel let-
BEFORE PLUGGING IN THE UNIT FOR THE
FIRST TIME, READ THE FOLLOWING SEC-
AC outlet voltages vary from country to country.
Make sure that the voltage in your area meets the
voltage requirements printed on the unit's rear panel
(e.g., AC 230240 V, 50 Hz or AC 120 V, 60 Hz).
The power cord plug is used to disconnect this unit
from the AC power source. Make sure that the plug
is readily operable (easily accessible) at all times.
Pressing the [STANDBY/ON] button to select
Standby mode does not fully shutdown the unit. If
you do not intend to use the unit for an extended
period, remove the power cord from the AC outlet.
5. Never Touch this Unit with Wet Hands--Never
handle this unit or its power cord while your hands
are wet or damp. If water or any other liquid gets
inside this unit, have it checked by your Onkyo
6. Handling Notes
· If you need to transport this unit, use the original
packaging to pack it how it was when you origi-
nally bought it.
· Do not leave rubber or plastic items on this unit
for a long time, because they may leave marks on
· This unit's top and rear panels may get warm
after prolonged use. This is normal.
· If you do not use this unit for a long time, it may
not work properly the next time you turn it on, so
be sure to use it occasionally.
For U.S. models
FCC Information for User
The user changes or modifications not expressly
approved by the party responsible for compliance could
void the user's authority to operate the equipment.
This equipment has been tested and found to comply
with the limits for a Class B digital device, pursuant to
Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interfer-
ence in a residential installation.
This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accor-
dance with the instructions, may cause harmful interfer-
ence to radio communications. However, there is no
guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful inter-
ference to radio or television reception, which can be
determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by
one or more of the following measures:
· Reorient or relocate the receiving antenna.
· Increase the separation between the equipment and
· Connect the equipment into an outlet on a circuit dif-
ferent from that to which the receiver is connected.
· Consult the dealer or an experienced radio/TV tech-
nician for help.
For Canadian Models
NOTE: THIS CLASS B DIGITAL APPARATUS
COMPLIES WITH CANADIAN ICES-003.
For models having a power cord with a polarized plug:
CAUTION: TO PREVENT ELECTRIC SHOCK,
MATCH WIDE BLADE OF PLUG TO WIDE SLOT,
Modèle pour les Canadien
REMARQUE: CET APPAREIL NUMÉRIQUE DE
LA CLASSE B EST CONFORME À LA NORME
NMB-003 DU CANADA.
Sur les modèles dont la fiche est polarisée:
ATTENTION: POUR ÉVITER LES CHOCS ÉLEC-
TRIQUES, INTRODUIRE LA LAME LA PLUS
LARGE DE LA FICHE DANS LA BORNE CORRE-
SPONDANTE DE LA PRISE ET POUSSER
· The speaker cabinets are made out of wood and are
therefore sensitive to extreme temperatures and
humidity, do not put them in locations subject to direct
sunlight or in humid places, such as near an air condi-
tioner, humidifier, bathroom, or kitchen.
· Do not put water or other liquids close to the speakers.
If liquid is spilled over the speakers, the drive units
may be damaged.
· Speakers should only be placed on sturdy, flat surfaces
that are free from vibration. Putting them on uneven or
unstable surfaces, where they may fall and cause dam-
age, will affect the sound quality.
· Subwoofer is designed to be used in the upright verti-
cal position only. Do not use it in the horizontal or
· If the unit is used near a turntable, CD player or DVD
player, howling or slipping of sound may occur. To
prevent this, move the unit away from the turntable,
CD player or DVD player otherwise lower the unit's
Using Close to a TV or Computer
TVs and computer monitors are magnetically sensitive
devices and as such are likely to suffer discoloration or
picture distortion when conventional speakers are placed
nearby. To prevent this, the speakers feature internal mag-
netic shielding. In some situations, however, discolora-
tion may still be an issue, in which case you should turn
off your TV or monitor, wait 15 to 30 minutes, and then
turn it back on again. This normally activates the degauss-
ing function, which neutralizes the magnetic field,
thereby removing any discoloration effects. If discolora-
tion problems persist, try moving the speakers away from
your TV or monitor. Note that discoloration can also be
caused by a magnet or demagnetizing tool that's too close
to your TV or monitor.
Input Signal Warning
The speakers can handle the specified input power when
used for normal music reproduction. If any of the follow-
ing signals are fed to them, even if the input power is
within the specified rating, excessive current may flow in
the speaker coils, causing burning or wire breakage:
1. Interstation noise from an untuned FM radio.
2. Sound from fast-forwarding a cassette tape.
3. High-pitched sounds generated by an oscillator, elec-
tronic musical instrument, and so on.
4. Amplifier oscillation.
5. Special test tones from audio test CDs and so on.
6. Thumps and clicks caused by connecting or discon-
necting audio cables (Always turn off your amplifier
before connecting or disconnecting cables.)
7. Microphone feedback.
Make sure you have the following items:
AV receiver (HT-R557)
Remote controller and two batteries (AA/R6)
Indoor FM antenna
AM loop antenna
Speaker setup microphone
Speaker terminal tool
* In catalogs and on packaging, the letter at the end of the
product name indicates the color. Specifications and oper-
ation are the same regardless of color.
Front speakers (SKF-645F)
Center speaker (SKC-645C)
Surround speakers (SKM-645S)
Speaker cable for front speakers 15 ft. (4.5 m)
Speaker cable for center speaker 10 ft. (3 m)
Speaker cables for surround speakers 30 ft. (9 m)
RCA cable for subwoofer connection 10 ft. (3 m)
Base for horizontal mounting (For the center
Rubber spacers  (For the speakers)