Before connecting this unit to the amplifier (or receiver), observe the following carefully.
· Before connecting this unit to an amplifier, turn off the amplifier first.
· Make all connections before plugging in this unit.
· DO NOT use the INPUT 1 (LOW-LEVEL) and INPUT 2 (HIGH-LEVEL) terminals on the rear of this unit at the same
time; otherwise, noise will be heard and may damage the unit.
· DO NOT connect this unit to the REC OUT jacks of your amplifier.
Checking and Connecting to Your Amplifier
Before connecting this unit to your amplifier (or receiver), check what types of
connecting terminals your amplifier has. Follow the instructions below to find a
proper connection method for your equipment.
· Illustrations of jacks and terminals in this manual may be different from the ones
actually used for your amplifier. The illustrations are of the most used type.
· When connecting to your amplifier (or receiver), refer also the manual supplied
for your equipment.
Thank you for purchasing a JVC speaker.
Before you begin using it, please read the instructions carefully to
be sure you get the best possible performance. If you have any
questions, consult your JVC dealer.
Warnings
To reduce the risk of electrical shocks, fire, etc.:
1. Do not remove screws, covers or cabinet.
2. Do not expose this appliance to rain or moisture.
Caution--POWER switch
This apparatus is provided with the POWER switch to minimize
power consumption for safe use. Therefore,
1. Before doing initial settings, complete all the connections
required, connect the mains plug into the wall outlet, then set the
POWER switch to ON [
].
2. When not in use, set the POWER switch to OFF [
].
This disconnects the mains line.
Cautions
· Do not block the ventilation openings or holes. (If the ventilation
openings or holes are blocked by a newspaper or cloth, etc., the
heat may not be able to get out.)
· Do not place any naked flame sources, such as lighted candles,
on the apparatus.
· When discarding batteries, environmental problems must be
considered and local rules or laws governing the disposal of
these batteries must be followed strictly.
· Do not expose this apparatus to rain, moisture, dripping or
splashing and that no objects filled with liquids, such as vases,
shall be placed on the apparatus.
0503NSMMDWJSC
EN
TO MAIN
SPEAKERS
RIGHT
RIGHT
LEFT
RIGHT
LEFT
LEFT/MONO
MAX
VOLUME
50Hz
200Hz
MIN
ON
OFF
FIXED
VARIABLE
POWER
FREQUENCY
CUT OFF FILTER
LINE OUT
L
R
RIGHT
LEFT/MONO
(LOW-LEVEL)
INPUT 1
INPUT 2
(HIGH-LEVEL)
(LOW-LEVEL)
INPUT 1
AUTO POWER ON/STANDBY
PHASE
CANCEL
ON
REVERSE
NORMAL
LVT0951-007A
[UJ]
Caution--Proper Ventilation
To avoid risk of electric shock and fire, and to prevent damage,
locate the apparatus as follows:
1 Front:
No obstructions and open spacing.
2 Sides/ Top/ Back: No obstructions should be placed in the areas
shown by the dimensions below.
3 Bottom:
Place on the level surface. Maintain an
adequate air path for ventilation by placing on
a stand with a height of 10 cm or more.
Precautions for installation
· To prevent deformation or discoloration of the cabinet,
do not install the unit where it is exposed to direct
sunlight or high humidity, and avoid installation near air
conditioning outlets.
· Speaker vibrations may cause howling. Place the unit
as far away from the player as possible.
· Take the occurrence of earthquakes or other physical
shocks into consideration when selecting the
installation place, and secure the unit thoroughly.
15 cm
15 cm
20 cm
10 cm
Front view
20 cm
20 cm
Side view
Front
Connecting Method i
Connect an amplifier having line output jacks to the INPUT 1 (LOW-
LEVEL) terminal.
Preparation:
Purchase a stereo audio cord at
an audio shop or electric shop.
Connecting Method Å
Connect an amplifier having a subwoofer output jack to the LEFT/
MONO jack of the INPUT 1 (LOW-LEVEL) terminal.
Preparation:
Use the supplied monaural audio
cord.
· When you connect main (front) speakers to the TO MAIN
SPEAKERS terminal, use the speakers within the impedance range
indicated by the amplifier connected to the INPUT 2 (HIGH-LEVEL)
terminal. If not, the amplifier connected to the INPUT 2 (HIGH-
LEVEL) terminal may malfunction and be damaged.
· DO NOT connect more than one speaker to one speaker terminal.
TO MAIN
SPEAKERS
RIGHT
RIGHT
LEFT
RIGHT
LEFT
LEFT/MONO
MAX
VOLUME
50Hz
200Hz
MIN
ON
OFF
FIXED
VARIABLE
POWER
FREQUENCY
CUT OFF FILTER
RIGHT
LEFT
FRONT SPEAKERS
TO MAIN
SPEAKERS
INPUT 2
(HIGH-LEVEL)
RIGHT
LEFT
RIGHT
LEFT
INPUT 2
(HIGH-LEVEL)
(LOW-LEVEL)
INPUT 1
AUTO POWER ON/STANDBY
PHASE
CANCEL
ON
REVERSE
NORMAL
Main (Front) Speakers
(not supplied)
Your Amplifier
Your Amplifier
SX-DW303
Main (Front) Speakers
(not supplied)
Stereo audio cord
(not supplied)
To an AC
outlet
Right speaker
SUBWOOFER
OUT
RIGHT
LEFT/MONO
(LOW-LEVEL)
INPUT 1
TO MAIN
SPEAKERS
RIGHT
RIGHT
LEFT
RIGHT
LEFT
LEFT/MONO
MAX
VOLUME
50Hz
200Hz
MIN
ON
OFF
FIXED
VARIABLE
POWER
FREQUENCY
CUT OFF FILTER
INPUT 2
(HIGH-LEVEL)
(LOW-LEVEL)
INPUT 1
AUTO POWER ON/STANDBY
PHASE
CANCEL
ON
REVERSE
NORMAL
Main (Front) Speakers
(not supplied)
SX-DW303
Speaker cords
(not supplied)
To an AC outlet
Left speaker
Connecting Method Ç
Connect an amplifier without a subwoofer output jack and line
output jacks to the INPUT 2 (HIGH-LEVEL) terminal.
Preparation:
Purchase speaker cords at an
audio shop or electric shop.
How to connect the speaker cords:
1 Press and hold the clamp of the speaker terminal.
2 Insert the end of the speaker cord into the terminal.
· Match the polarity of the speaker terminals:
ª to ª and · to ·.
Speaker cords
(not supplied)
Your Amplifier
SX-DW303
Monaural audio cord
(supplied)
To an AC outlet
When using Connecting Method Å, no signal comes out of
the TO MAIN SPEAKERS terminal.
If your amplifier has only a monaural line output (MONO) jack,
connect it to the LEFT/MONO jack of the INPUT 1 (LOW-
LEVEL) terminal (see Connecting Method Å).
· This unit is magnetically shielded to avoid color distortions on TVs.
However, if not installed properly, it may cause color distortions.
So, pay attention to the following when installing the unit.
When placing this unit near a TV set, turn off the TV's main
power switch or unplug it before installing this unit.
Then wait at least 30 minutes before turning on the TV's main
power switch again.
Some TVs may still be affected even though you have followed
the above. If this happens, move this unit away from the TV.
· Tuner reception may become noisy or hissing if this unit is
installed nearby the tuner. In this case, leave a more distance
between the tuner and this unit or use an outdoor antenna for
better tuner reception without interference from this unit.
Precautions for Daily Use
· To maintain the appearance of the unit
Wipe with a dry, soft cloth if the cabinet or control panel should
become dirty.
If very dirty, apply a small amount of water or neutral detergent
to the cloth and wipe clean. Then wipe with a dry cloth.
· To improve the sound field
If the speakers are facing a solid wall or glass door,
etc., it is recommended to furnish the wall with
materials that absorb sounds, for example by hanging
up thick curtains, to prevent reflections and standing
waves.
Checking the Supplied Accessories
Check to be sure you have the following supplied accessories.
The number in parenthesis indicates the quantity of the piece supplied.
· Monaural audio cord (1)
· AC plug adaptor (1)
If the item mentioned above is missing, contact your dealer
immediately.
Connections
SUBWOOFER
OUT
LINE OUT
L
R
RIGHT
LEFT
FRONT SPEAKERS
First check whether your amplifier has a subwoofer output jack.
It is usually named and printed as the "SUBWOOFER OUT" or
"SUBWOOFER."
Next check whether your amplifier has line output jacks.
They are usually named and printed as "LINE OUT" or "LINE
OUTPUT."
Follow Connecting Method Ç.
This connection can be used for any amplifier, by connecting
the front speaker terminals of the amplifier (usually named
and printed as "FRONT SPEAKERS" or "MAIN SPEAKERS").
If you cannot
find any
If you find them on your amplifier, follow Connecting Method i.
If you find it on your amplifier, follow Connecting Method Å.
If you cannot
find any
If you find it
If you find them
POWERED SUBWOOFER
SX-DW303
INSTRUCTIONS
2003 VICTOR COMPANY OF JAPAN, LIMITED
SX-DW303_UJ.p65
03.5.2, 6:33 PM
1
INPUT 2
TO MAIN
SPEAKERS
(HIGH-LEVEL)
(LOW-LEVEL)
RIGHT
RIGHT
LEFT
RIGHT
LEFT
LEFT/MONO
MAX
VOLUME
50Hz
200Hz
MIN
CANCEL
ON
ON
OFF
REVERSE
NORMAL
FIXED
VARIABLE
INPUT 1
POWER
FREQUENCY
AUTO POWER ON/STANDBY
PHASE
CUT OFF FILTER
Å
Ç
i
Ç
Î
POWER
PHASE
AUTO POWER
ON/STANDBY
VOLUME
FREQUENCY
CUT OFF
FILTER
Front view
Rear view
Operations
If your amplifier is not provided with a
crossover frequency setting:
1 Press out the CUT OFF FILTER button to set it
to the
-- VARIABLE position.
Now the FREQUENCY knob is activated and you
can adjust the crossover frequency on this unit.
2 Turn the FREQUENCY knob to obtain the
best matching crossover frequency with
your main speakers.
Adjust the frequency (50 Hz to 200 Hz) while
listening to playback sound coming out of both
the main speakers and this unit.
· If your main speakers can reproduce the bass sound well,
adjust the frequency at a lower level.
· If you feel bass sounds are not sufficient, adjust the frequency
at a higher level.
Changing the Phase--PHASE Î
You can change the sound phase to match your preference.
Select either "NORMAL" or "REVERSE" to obtain a better bass
sound.
Press in or out the PHASE button to select either
the NORMAL position or the REVERSE position.
· NORMAL
: Normally select this.
· REVERSE : Select this when you feel the bass sound is better
with this mode rather than with "NORMAL."
Operating the Unit Automatically According to the
Incoming Signals--AUTO POWER ON/STANDBY
By using this function, this unit automatically enters standby mode
even though the POWER switch is turned ON [
].
Press the AUTO POWER ON/STANDBY
button to the
-- ON position.
· If no sound comes in for about 10 minutes, the unit automatically
enters standby mode. The power lamp lights in red. Then if the
unit detects incoming signals, this unit starts operating
automatically (the power lamp now lights in green).
If Auto Power On/Standby does not work
correctly (see "MEMO" below), press out the
AUTO POWER ON/STANDBY button to set it to
the
_ CANCEL position. Auto Power On/
Standby is canceled.
When the volume level of the amplifier is so low or the
incoming signals are so weak that this unit cannot detect
sounds, Auto Power On/Standby may not work correctly.
· This unit may enter standby mode even though signals are
coming in.
· This unit may not start operating after entering standby
mode, even though signals start coming in.
200Hz
FREQUENCY
50Hz
REVERSE
NORMAL
PHASE
FIX
VARIABLE
CUT OFF FILTER
CANCEL
ON
AUTO POWER ON / STANDBY
Additional Information
Power
lamp
CANCEL
ON
AUTO POWER ON / STANDBY
Possible Cause
Is the unit pugged in?
Signals are too weak or volume
level is too low.
Is the VOLUME knob turned to the
MIN position?
Connections are incorrect, or loose.
Audio signals through the amplifier
are extremely weak.
The built-in protective circuit is
working.
The VOLUME knob on the rear is
set to a very high level.
The volume of the playback source
is too high.
Symptom
Power does not come on.
Auto Power On/Standby does not
function correctly.
No sound is heard.
Sounds fluctuate (suddenly become
loud or soft).
Suddenly no sound comes out.
--the power lamp lights in red.
Suddenly no sound comes out.
--the power lamp still lights in green.
Action
Plug the AC power cord firmly into the AC
outlet.
This is not a malfunction. If this happens, cancel
Auto Power On/Standby.
Turn the VOLUME knob until a suitable volume
is found.
Check the connections. If incorrect, redo the
corrections.
Increase the volume level on the amplifier.
Lower the volume level on the amplifier so that
the symptom will not occur.
Turn down the volume, then turn off and on this
unit.
Turn down the volume of the playback source,
turn off and on the source, then adjust the
volume properly on the source.
Troubleshooting
Use this chart to help you solve daily operational problems. If there is any problem you cannot solve,
contact your dealer.
Specifications
Type : Powered Subwoofer
Bass-reflex type, (magnetically shielded type)
Speaker unit : 16.0 cm cone (
× 1)
Frequency range : 30 Hz to 200 Hz
Input impedance : 50 k
(LOW-LEVEL), 470 (HIGH-LEVEL)
Input terminals : INPUT 1 (LOW-LEVEL), INPUT 2 (HIGH-LEVEL)
Power requirements : AC 110 V 240 V
, 50 Hz/60 Hz
Output power of built-in amp : 100 W (45 Hz, 4
, 10 % THD)
Power consumption : 27 W
Dimensions : 217 mm (width)
× 393 mm (height) × 376 mm (depth)
Mass : 9.2 kg
Accessories : Monaural audio cord (
× 1), AC plug adaptor (× 1)
Speaker layout
To obtain the best possible sound from your unit:
--Place a subwoofer wherever you like since bass sound is non-directional. Normally
place it in front of you.
--Place all the main speakers at the same distance from the listening position.
Subwoofer
Left front
speaker
Right front
speaker
Center
speaker
Listening position
Left surround
speaker
Right surround
speaker
Turning On the Power--POWER Å
Press the ON [
] portion of the POWER switch.
The main power turns on and the power lamp in the front panel
lights in green.
· The power lamp lights in red when the
Auto Power On/Standby places the
unit into standby mode.
To completely cut off the power to
this unit
Press the OFF [
] portion of the
POWER switch.
This will disconnect the mains lead.
Adjusting the Volume--VOLUME i
Adjust the volume output level through this unit while comparing
with the sounds coming out of the main (front) speakers.
· Once you have adjusted the volume output level of this unit, you
do not need to adjust it each time you use this unit. Adjusting the
volume level on the connected amplifier will also adjust the
volume level through this unit.
1 Turn the VOLUME knob to the MIN position.
2 Turn on the connected amplifier and start playing a source.
Playback sounds come out of the main (front) speakers and this unit.
3 Adjust the VOLUME knob to obtain a well-
balanced sound level with that of the main
(front) speakers.
If the volume is set at a high level before starting play, the
sudden blast of sound energy can permanently damage your
hearing and/or ruin your speakers.
Adjusting the Crossover Frequency
--CUT OFF FILTER and FREQUENCY Ç
You can adjust the crossover frequency to determine the bass
sound level this unit handles.
· Once it is set, only the sounds below the frequency come out of
the built-in speaker.
When the main speakers in use are JVC's
SP-X103, SP-F303 or SX-XD33
Press in the CUT OFF FILTER button to set it to the
_ FIX position.
· The FREQUENCY knob is deactivated.
· When your amplifier is equipped with crossover frequency
setting, set it within the range of 100 Hz to 150 Hz.
· When your amplifier is equipped with speaker size setting, select "small."
MAX
VOLUME
MIN
FIX
VARIABLE
CUT OFF FILTER
MAX
VOLUME
MIN
The unit automatically accommodates AC power between
110V and 240V. You do not need any setting to match the
unit with your local power voltage.
SX-DW303_UJ.p65
03.5.2, 6:33 PM
2