SKW204_En Page 1 Monday, March 20, 2006 9:22 AM
Contents
Powered Subwoofer
Getting Started
Important Safety Instructions........ 2
Precautions ..................................... 3
Supplied Accessories..................... 4
SKW-204
Instruction Manual
Installing & Using
Controls ........................................... 5
Connections .................................... 6
Subwoofer effects........................... 6
Adjustments .................................... 7
Placement........................................ 7
Thank you for purchasing an Onkyo powered
subwoofer.
Please read this manual thoroughly before using
the unit.
Following the instructions in this manual will
enable you to obtain optimum performance and
listening enjoyment from your new powered
subwoofer.
Appendix
Troubleshooting.............................. 7
Specifications.................................. 8
Please retain this manual for future reference.
En
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SKW204_En Page 3 Monday, March 20, 2006 9:22 AM
Precautions
1. AC Fuse—The AC fuse inside the unit is not user-
serviceable. If you cannot turn on the unit, contact
your Onkyo dealer.
For British models
Replacement and mounting of an AC plug on the power
supply cord of this unit should be performed only by
qualified service personnel.
2. 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-
tering.
IMPORTANT
The wires in the mains lead are coloured in accordance
with the following code:
Blue:
Neutral
Brown: Live
As the colours of the wires in the mains lead of this
apparatus may not correspond with the coloured mark-
ings identifying the terminals in your plug, proceed as
follows:
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.
Use a vacuum cleaner to remove dust from hard-to-
reach grilles.
3. Power
WARNING
BEFORE PLUGGING IN THE UNIT FOR THE
FIRST TIME, READ THE FOLLOWING SEC-
TION CAREFULLY.
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 230 V, 50 Hz or AC 120 V, 60 Hz).
IMPORTANT
The plug is fitted with an appropriate fuse. If the fuse
needs to be replaced, the replacement fuse must
approved by ASTA or BSI to BS1362 and have the same
ampere rating as that indicated on the plug. Check for
the ASTA mark or the BSI mark on the body of the fuse.
If the power cord’s plug is not suitable for your socket
outlets, cut it off and fit a suitable plug. Fit a suitable
fuse in the plug.
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.
Some models have a voltage selector switch for
compatibility with power systems around the world.
Before you plug in such a model, make sure that the
voltage selector is set to the correct voltage for your
area.
For European Models
For Canadian Models
For models having a power cord with a polarized plug:
CAUTION: TO PREVENT ELECTRIC SHOCK,
MATCH WIDE BLADE OF PLUG TO WIDE SLOT,
FULLY INSERT.
Declaration of Conformity
We,
ONKYO EUROPE
ELECTRONICS GmbH
LIEGNITZERSTRASSE 6,
82194 GROEBENZELL,
GERMANY
Modèle pour les Canadien
declare in own responsibility, that the ONKYO product
described in this instruction manual is in compliance with the
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
JUSQU’AU FOND.
corresponding
technical standards such as EN60065,
EN55013, EN55020 and EN61000-3-2, -3-3.
GROEBENZELL, GERMANY
K. MIYAGI
ONKYO EUROPE ELECTRONICS GmbH
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SKW204_En Page 4 Monday, March 20, 2006 9:22 AM
Supplied Accessories
Precautions—Continued
•
Pin connector cable 10 ft. (3 m)
Placement
• The subwoofer cabinet is made out of wood and is
therefore sensitive to extreme temperatures and
humidity, do not put it 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 sub-
woofer. If liquid is spilled over the subwoofer, the
drive units may be damaged.
•
Power-plug adapter
Only supplied in certain countries. Use this adapter
if your AC outlet does not match with the plug on
the AV Receiver’s power cord. (Adapter varies from
country to country.)
• Subwoofer should only be placed on sturdy, flat sur-
faces that are free from vibration. Putting it on uneven
or unstable surfaces, where it 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
tilted position.
• If the subwoofer is used near a turntable, CD player or
DVD player, howling or slipping of sound may occur.
To prevent this, move it away from the turntable, CD
player or DVD player, otherwise lower the unit’s out-
put level.
*
In catalogs and on packaging, the letter added to the end of
the product name indicates the color of the SKW-204.
Specifications and operation are the same regardless of
color.
4
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SKW204_En Page 5 Monday, March 20, 2006 9:22 AM
Controls
FRONT VIEW
A Standby/On indicator (STANDBY/ON)
This indicator lights up when the power switch is set to the ON position.
Red: The unit is in Standby mode
Green: The unit is in Operational mode
If the power is turned on, the SKW-204 automatically enters Operational mode when a
signal is input.
The SKW-204 automatically returns to Standby mode when no signal has been input
for a while.
1
REAR PANEL
North American Model
Other Models
7
2
3
4
(Only some models)
5
6
To AC outlet
To AC outlet
B POWER switch
E OUTPUT LEVEL knob
Use this knob to adjust the volume of the sub-
woofer.
Press this switch to the ON position to turn on the
power. Press it to the OFF position to turn off the
power.
F LINE INPUT jack
C FREQUENCY knob
Connect this jack to the SUBWOOFER PREOUT
jacks on the amplifier etc.
Use this knob to select the high-frequency range at
which to cut off the signal to the subwoofer.
You can select any frequency between 50 Hz and
200 Hz, depending on the characteristics of the
speaker system.
G VOLTAGE SELECTOR (Only some models)
This voltage selector provides compatibility with
power systems around the world.
D PHASE switch
Note:
Use this switch to reverse the phase of the SKW-
204. Normally, set the switch to the “NOR” posi-
tion. Depending on the connected speakers or the
installation environment of the SKW-204 however,
the “REV” position may result in better sound.
Select the switch position that produces a louder
bass sound.
The auto standby function engages if the input signal
level is constant. If the auto standby function does not
operate properly, try slightly increasing (or decreasing)
the subwoofer output level of the receiver.
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SKW204_En Page 6 Monday, March 20, 2006 9:22 AM
Connections
Subwoofer effects
For safety considerations, turn off all other system com-
ponents before you connect or disconnect any compo-
nent and plug the power cable for the last.
Adding a subwoofer to your speaker system expands the
bandwidth of the bass range. However, if the sub-
woofer’s reproduction bandwidth or sound output level
is improperly adjusted, the overall performance may
decrease, as shown in the graphs below.
Using the SKW-204 with an AV
amplifier
When the subwoofer’s reproduction bandwidth
is correct
When using the SKW-204 in conjunction with an AV
amplifier or receiver that features surround capability,
connect the SKW-204 LINE INPUT to SUBWOOFER
PREOUT jack using the supplied pin connector cable.
Overall characteristics
Speaker characteristics
SUBWOOFER
PREOUT
Subwoofer characteristics
When the subwoofer’s output level is incorrect
(Supplied)
Output level is too high
SKW-204
Output level is too low
When the subwoofer’s reproduction bandwidth
is far from the speaker’s bandwidth
Curve is sunken
When the subwoofer’s reproduction bandwidth
is close to the speaker’s bandwidth
Curve is raised
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SKW204_En Page 7 Monday, March 20, 2006 9:22 AM
Adjustments
Troubleshooting
Crossover frequency and output level
The unit does not turn on
•
Adjust the SKW-204 output level and crossover fre-
quency to suit your listening room and connected
speakers.
Be aware that you might set the subwoofer to a high
output level because superbass-range sound is less
audible than other sound ranges. To obtain well-bal-
anced frequency characteristics, set the output level
to a slightly lower level than seems optimal. (This
will also prevent the input of signals that are too
strong.)
• The power plug is not fully inserted.
➞ Insert the power plug fully into the power outlet.
No sound is output
•
• The OUTPUT LEVEL knob is set to the MIN level.
➞ Set the OUTPUT LEVEL knob properly.
• Pin connector cable is not properly connected to the
LINE INPUT jack.
• The speaker setting at the amplifier (or receiver) is
incorrect.
➞ Check the settings at the amplifier (or receiver).
Note:
• The input signal is so small that the unit entered
Standby mode.
➞ Slightly increase the output level at the amplifier
(or receiver).
Be careful not to allow the input of excessive power.
Input levels that greatly exceed normal situations can
damage the SKW-204. Also note that switching opera-
tions at the amplifier may generate excessive noise that
may result in damage. When using switches at the
amplifier, first lower the volume to prevent accidental
damage.
Low sound output
• The sound source might not include a superbass range.
➞ Play a sound source that includes a superbass
range.
Hum noise
Placement
• Pin connector plug is not inserted completely.
➞ Fully insert the pin connector plug.
The placement of the SKW-204 can greatly affect the
sound that is produced. In general, a good bass sound
can be obtained by installing the subwoofer in a front
corner, or at one-third the width of the wall, as shown.
• External leakage flux (induction noise by TV, etc.)
occurs.
➞ Relocate the SKW-204 away from the noise
source and re-connect.
Corner
1/3 room
length
7
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SKW204_En Page 8 Monday, March 20, 2006 9:22 AM
Specifications
Type
Bass-reflex with built-in power amplifier
Input sensitivity/impedance 140 mV / 20 kΩ
Frequency response
Maximum output power
Cabinet capacity
Drivers unit:
25–200 Hz
230 W Dynamic
1.36 cubic feet (38 L)
10 inch (25 cm) woofer
North American: AC 120 V, 60 Hz
Power supply
European:
Others:
AC 230-240 V, 50 Hz
AC 120/220-240 V, 50/60 Hz
Power consumption
North American: 140 W
Others: 137 W
Dimensions (W × H × D)
10-13/16" × 18-5/8" × 16-7/8"
275 × 473 × 428 mm
Weight
26.0 lbs. (11.8 kg)
Accessory
Pin connector cable (1 pc.)
Power plug adapter (1 pc.) (only supplied in certain countries)
Instruction manual (this manual)
Auto standby
Others
Specifications and appearance are subject to change without prior notice.
Sales & Product Planning Div. : 2-1, Nisshin-cho, Neyagawa-shi, OSAKA 572-8540, JAPAN
Tel: 072-831-8023 Fax: 072-831-8124
ONKYO U.S.A. CORPORATION
18 Park Way, Upper Saddle River, N.J. 07458, U.S.A.
ONKYO EUROPE ELECTRONICS GmbH
Liegnitzerstrasse 6, 82194 Groebenzell, GERMANY
ONKYO EUROPE UK Office
Suite 1, Gregories Court, Gregories Road, Beaconsfield, Buckinghamshire, HP9 1HQ
UNITED KINGDOM Tel: +44-(0)1494-681515 Fax: +44(0)-1494-680452
HOMEPAGE
ONKYO CHINA LIMITED
Units 2102-2107, Metroplaza Tower I, 223 Hing Fong Road, Kwai Chung,
N.T., HONG KONG Tel: 852-2429-3118 Fax: 852-2428-9039
I0603-1
SN 29344239
(C) Copyright 2006 ONKYO CORPORATION Japan. All rights reserved.
* 2 9 3 4 4 2 3 9 *
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