Yamaha YST-SW315 / YST-SW215 Owner's Manual

Yamaha YST-SW315 / YST-SW215 Owner's Manual
UB
YST-SW315
YST-SW215
Subwoofer System
OWNERS MANUAL
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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.
Explanation of Graphical Symbols
The lightning flash with arrowhead symbol,
within an equilateral triangle, is intended to
alert you 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 you to the
presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the appliance.
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. 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 receptacles,
and the point where they exit from the apparatus.
WARNING
TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS APPLIANCE TO
RAIN OR MOISTURE.
IMPORTANT
Please record the serial number of this system in the
space below.
Model:
Serial No.:
The serial number is located on the rear of the main
unit.
Retain this Owner’s Manual in a safe place for future
reference.
11 Only use attachments/accessories specified by the
manufacturer.
12 Use only with the cart, stand,
tripod, bracket, or table
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.
• Be sure to allow spaces of at least 20 cm above,
behind and on both sides of the unit.
• Do not place the following objects on the unit:
A vessel with water in it.
If the vessel falls by vibrations and water spills, it
may cause damage to the unit, and/or you may get an
electric shock.
+ORQTVCPV5CHGV[+PUVTWEVKQPHO2CIG(TKFC[/CTEJ2/
FCC INFORMATION (for US customers)
We Want You Listening For A
Lifetime
1 IMPORTANT NOTICE : DO NOT MODIFY
THIS UNIT!
This product, when installed as indicated in the
instructions contained in this manual, meets FCC
requirements. Modifications not expressly
approved by Yamaha may void your authority,
granted by the FCC, to use the product.
2 IMPORTANT : When connecting this product to
accessories and/or another product use only high
quality shielded cables. Cable/s supplied with this
product MUST be used. Follow all installation
instructions. Failure to follow instructions could
void your FCC authorization to use this product in
the USA.
3 NOTE : This product has been tested and found to
comply with the requirements listed in FCC
Regulations, Part 15 for Class “ B” digital devices.
Compliance with these requirements provides a
reasonable level of assurance that your use of this
product in a residential environment will not result
in harmful interference with other electronic
devices.
This equipment generates/uses radio frequencies and,
if not installed and used according to the instructions
found in the users manual, may cause interference
harmful to the operation of other electronic devices.
Compliance with FCC regulations does not guarantee
that interference will not occur in all installations. If
this product is found to be the source of interference,
which can be determined by turning the unit “ OFF”
and “ ON” , please try to eliminate the problem by using
one of the following measures:
Relocate either this product or the device that is being
affected by the interference.
Utilize power outlets that are on different branch (circuit
breaker or fuse) circuits or install AC line filter/s.
In the case of radio or TV interference, relocate/
reorient the antenna. If the antenna lead-in is 300 ohm
ribbon lead, change the lead-in to coaxial type cable.
If these corrective measures do not produce
satisfactory results, please contact the local retailer
authorized to distribute this type of product. If you can
not locate the appropriate retailer, please contact
Yamaha Electronics Corp., U.S.A. 6660 Orangethorpe
Ave, Buena Park, CA 90620.
The above statements apply ONLY to those products
distributed by Yamaha Corporation of America or its
subsidiaries.
YAMAHA and the Electronic Industries Association’s
Consumer Electronics Group want you to get the most out
of your equipment by playing it at a safe level. One that
lets the sound come through loud and clear without
annoying blaring or distortion – and, most importantly,
without affecting your sensitive hearing.
Since hearing damage from loud
sounds is often undetectable until it is
too late, YAMAHA and the
Electronic Industries Association’s
Consumer Electronics Group
recommend you to avoid prolonged
exposure from excessive volume
levels.
YST-SW315_215_03.25UB.fm Page 1
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12:05 PM
Thank you for selecting this YAMAHA subwoofer system.
CAUTION: Read this before operating your unit
Please read the following operating precautions
before use. YAMAHA will not be held responsible
for any damage and/or injury caused by not
following the cautions below.
• To assure the finest performance, please read this
manual carefully. Keep it in a safe place for future
reference.
• Install this unit in a cool, dry, clean place - away from
windows, heat sources, sources of excessive vibration,
dust, moisture and cold. Avoid sources of humming
(transformers, motors). To prevent fire or electrical
shock, do not expose this unit to rain or water.
• Never open the cabinet. If something drops into the set,
contact your dealer.
• The voltage to be used must be the same as that specified
on the rear panel. Using this unit with a higher voltage
than specified is dangerous and may cause a fire and/or
electric shock.
• To reduce the risk or fire or electric shock, do not expose
this unit to rain or moisture.
• Do not use force on switches, controls or connection
wires. When moving the unit, first disconnect the power
plug and the wires connected to other equipments.
Never pull the wires themselves.
• When not planning to use this unit for a long period (ie.,
vacation, etc.), disconnect the AC power plug from the
wall outlet.
• To prevent lightning damage, disconnect the AC power
plug when there is an electric storm.
• Since this unit has a built-in power amplifier, heat will
radiate from the rear panel. Place the unit apart from the
walls, allowing at least 20 cm of space above, behind and
on both sides of the unit to prevent fire or damage.
Furthermore, do not position with the rear panel facing
down on the floor or other surfaces.
• Do not cover the rear panel of this unit with a newspaper,
a tablecloth, a curtain, etc. in order not to obstruct heat
radiation. If the temperature inside the unit rises, it may
cause fire, damage to the unit and/or personal injury.
• Do not place the following objects on this unit:
Glass, china, small metallic etc.
If glass etc. falls by vibrations and breaks, it may cause
bodily injury.
A burning candle etc.
If the candle falls by vibrations, it may cause fire and
bodily injury.
A vessel with water in it
If the vessel falls by vibrations and water spills, it may
cause damage to the speaker, and/or you may get an
electric shock.
1
• Do not place this unit where foreign objects such as
water drips might fall. It might cause a fire, damage to
this unit, and/or personal injury.
• Never put a hand or a foreign object into the YST port
located on the right side of this unit. When moving this
unit, do not hold the port as it might cause personal
injury and/or damage to this unit.
• Never place a fragile object near the YST port of this
unit. If the object falls or drops by the air pressure, it may
cause damage to the unit and/or personal injury.
• Never open the cabinet. It might cause an electric shock
since this unit uses a high voltage. It might also cause
personal injury and/or damage to this unit.
• When using a humidifier, be sure to avoid condensation
inside this unit by allowing enough spaces around this
unit or avoiding excess humidification. Condensation
might cause a fire, damage to this unit, and/or electric
shock.
• Super-bass frequencies reproduced by this unit may
cause a turntable to generate a howling sound. In such a
case, move this unit away from the turntable.
• This unit may be damaged if certain sounds are
continuously outputted at high volume level. For
example, if 20 Hz-50 Hz sine waves from a test disc,
bass sounds from electronic instruments, etc. are
continuously outputted, or when the stylus of a turntable
touches the surface of a disc, reduce the volume level to
prevent this unit from being damaged.
• If you hear distorted noise (i.e., unnatural, intermittent
“rapping” or “hammering” sounds) coming from this
unit, reduce the volume level. Extremely loud playing of
a movie soundtrack’s low frequency, bass-heavy sounds
or similarly loud popular music passages can damage
this speaker system.
• Vibration generated by super-bass frequencies may
distort images on a TV. In such a case, move this unit
away from the TV set.
• Do not attempt to clean this unit with chemical solvents
as this might damage the finish. Use a clean, dry cloth.
• Be sure to read the “TROUBLESHOOTING” section
regarding common operating errors before concluding
that the unit is faulty.
• Secure placement or installation is the owner’s
responsibility. YAMAHA shall not be liable for any
accident caused by improper placement or
installation of speakers.
YST-SW315_215_03.25UB.fm Page 2
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12:05 PM
• VOLTAGE SELECTOR
(For China, Korea and General models)
The voltage selector switch on the rear panel of this
unit must be set for your local main voltage BEFORE
plugging this unit into the AC main supply. Voltages
are 110/120/220/240 V AC, 50/60 Hz.
CONTENTS
CAUTION ......................................................................1
FEATURES ....................................................................3
SUPPLIED ACCESSORIES ...........................................3
Standby mode
When this unit is turned off by pressing the
STANDBY/ON button on the front panel, this unit
consumes a small amount of power. This state is called
the standby mode. This unit’s power supply is
completely cut off from the AC line only when the
POWER switch on the rear panel is set in the OFF
position or the AC power cord is disconnected.
This unit features a magnetically shielded design, but
there is still a chance that placing it too close to a TV
set might impair picture color. Should this happen,
move this unit away from the TV set.
For U.K. customers
If the socket outlets in the home are not suitable for the
plug supplied with this appliance, it should be cut off and
an appropriate 3 pin plug fitted. For details, refer to the
instructions described below.
Note: The plug severed from the mains lead must be
destroyed, as a plug with bared flexible cord is hazardous
if engaged in a live socket outlet.
PLACEMENT ................................................................4
CONNECTIONS ........................................................... 5
1 Connecting to line output (pin jack) terminals
of the amplifier .................................................... 5
2 Connecting to speaker output terminals of
the amplifier .......................................................... 8
Connecting to the INPUT1/ OUTPUT terminals
of the subwoofer .......................................................12
Plug in the subwoofer to the AC outlet ....................12
CONTROLS AND THEIR FUNCTIONS .................. 13
AUTOMATIC POWER-SWITCHING
FUNCTION ................................................................. 15
ADJUSTING THE SUBWOOFER
BEFORE USE ............................................................. 16
Frequency characteristics .........................................17
ADVANCED YAMAHA ACTIVE SERVO
TECHNOLOGY .......................................................... 18
TROUBLESHOOTING ............................................... 19
SPECIFICATIONS .......................................................20
SPECIAL INSTRUCTIONS FOR U.K. MODEL
IMPORTANT:
THE WIRES IN 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
markings 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. Making sure that neither core is
connected to the earth terminal of the three pin plug.
For Canadian Customers
To prevent electric shock, match wide blade of plug
to wide slot and fully insert.
This Class B digital apparatus complies with
Canadian ICES-003.
2
YST-SW315_215_03.25UB.fm Page 3
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FEATURES
• This subwoofer system employs Advanced Yamaha
Active Servo Technology which Yamaha has developed
for reproducing higher quality super-bass sound. (Refer
to page 18 for details on Advanced Yamaha Active
Servo Technology.) This super-bass sound adds a more
realistic, theater-in-the-home effect to your stereo
system.
• This subwoofer can be easily added to your existing
audio system by connecting to either the speaker
terminals or the line output (pin jack) terminals of the
amplifier.
• For the effective use of the subwoofer, the subwoofer’s
super-bass sound should be matched to the sounds of
your main speakers. You can create the best sound
quality for various listening conditions by using the
HIGH CUT control and the PHASE switch.
• The Automatic power-switching function saves you the
trouble of pressing the STANDBY/ON button to turn the
power on and off.
• You can select bass effect suitable for the source by
using the B.A.S.S. button.
QD-Bass Technology
QD-Bass (Quatre Dispersion Bass) technology uses
square, pyramid-shaped reflective plates to radiate the
sound in four horizontal directions.
3
SUPPLIED ACCESSORIES
After unpacking, check that the following parts are
contained.
Non-skid pads
YST-SW315_215_03.25UB.fm Page 4
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12:05 PM
PLACEMENT
One subwoofer will have a good effect on your audio
system, however, the use of two subwoofers is
recommended to obtain more effect.
A
If using one subwoofer, it is recommended to place it on
the outside of either the right or the left main speaker. (See
fig. A .) If using two subwoofers, it is recommended to
place them on the outside of each main speaker. (See
fig. B .) The placement shown in fig. C is also possible,
however, if the subwoofer system is placed directly facing
the wall, the bass effect may die because the sound from it
and the sound reflected by the wall may cancel out each
other. To prevent this from happening, face the subwoofer
system at an angle as in fig. A or B .
B
Note
There may be a case that you cannot obtain enough superbass sounds from the subwoofer when listening in the
center of the room. This is because “standing waves” have
been developed between two parallel walls and they cancel
the bass sounds.
In such a case, face the subwoofer obliquely to the wall. It
also may be necessary to break up the parallel surfaces by
placing bookshelves etc. along the walls.
Use the non-skid pads
C
(
Put the provided non-skid pads at the four corners on the
bottom of the subwoofer to prevent the subwoofer from
moving by vibrations etc.
: subwoofer,
: main speaker)
4
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12:05 PM
CONNECTIONS
Choose one of the following two connecting methods that is more suitable for your audio
system.
■ Choose 1
(pages 5-7) if your amplifier has line output (pin jack) terminal(s)
■ Choose 2
(pages 8-11) if your amplifier has no line output (pin jack)
terminal
Caution: Unplug the subwoofer and other audio/video components before making
connections.
Notes
• All connections must be correct, that is to say L (left) to L, R (right) to R, “+” to “+” and “–” to “–”. Also, refer to the
owner’s manual of your component to be connected to the subwoofer.
• After all connections are completed, plug in the subwoofer and other audio/video components.
1
Connecting to line output (pin jack) terminals of the amplifier
• To connect with a YAMAHA DSP amplifier (or AV receiver), connect the SUBWOOFER (or LOW PASS etc.)
terminal on the rear of the DSP amplifier (or AV receiver) to the L /MONO INPUT2 terminal of the subwoofer.
• When connecting the subwoofer to the SPLIT SUBWOOFER terminals on the rear of the DSP amplifier, be sure to
connect the L /MONO INPUT2 terminal to the “L” side and the R INPUT2 terminal to the “R” side of the SPLIT
SUBWOOFER terminals.
Notes
• Some amplifiers have line output terminals labeled PRE OUT. When you connect the subwoofer to the PRE OUT
terminals of the amplifier, make sure that the amplifier has at least two sets of PRE OUT terminals. If the amplifier has
only one set of PRE OUT terminals, do not connect the subwoofer to the PRE OUT terminals. Instead, connect the
subwoofer to the speaker output terminals of the amplifier. (Refer to pages 8-11.)
• When connecting to a monaural line output terminal of the amplifier, connect the L /MONO INPUT2 terminal.
• When connecting to line output terminals of the amplifier, other speakers should not be connected to the OUTPUT
terminals on the rear panel of the subwoofer. If connected, they will not produce sound.
5
YST-SW315_215_03.25UB.fm Page 6
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12:05 PM
CONNECTIONS
■ Using
one subwoofer
<YST-SW315>
Subwoofer
Mono pin cable
(not included)
Audio pin cable
(not included)
To AC outlet
Amplifier
<YST-SW215>
Subwoofer
Mono pin cable
(not included)
To AC outlet
Audio pin cable
(not included)
Amplifier
6
YST-SW315_215_03.25UB.fm Page 7
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12:05 PM
CONNECTIONS
■
Using two subwoofers
<YST-SW315>
Mono pin cable
(not included)
Mono pin cable
(not included)
Amplifier
To AC outlet
To AC outlet
<YST-SW215>
Mono pin cable
(not included)
Mono pin cable
(not included)
Amplifier
To AC outlet
7
To AC outlet
YST-SW315_215_03.25UB.fm Page 8
Tuesday, April 15, 2003
2:22 PM
CONNECTIONS
2
Connecting to speaker output terminals of the amplifier
Select this method if your amplifier has no line output (pin jack) terminal.
If your amplifier has two sets of main speaker output terminals and both terminals can output
sound signals simultaneously.
• Connect one set of main speaker output terminals of the amplifier to the INPUT1 terminals of the subwoofer, and
connect the other set of main speaker output terminals of the amplifier to the main speakers.
• Set the amplifier so that both sets of main speaker output terminals output sound signals simultaneously.
Note
• If your amplifier has only one set of main speaker output terminals, see page 10.
■
Using one subwoofer (with speaker cables)
<YST-SW315>
Right main speaker
Left main speaker
Subwoofer
To AC outlet
Speaker output
terminals
Amplifier
<YST-SW215>
Right main speaker
Subwoofer
Left main speaker
To AC outlet
Speaker output
terminals
Amplifier
8
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12:05 PM
CONNECTIONS
■
Using two subwoofers (with speaker cables)
<YST-SW315>
Right main speaker
Left main speaker
Speaker output
terminals
Amplifier
Subwoofer
Subwoofer
To AC outlet
To AC outlet
<YST-SW215>
Right main speaker
Speaker output
terminals
Subwoofer
To AC outlet
9
Left main speaker
Amplifier
Subwoofer
To AC outlet
YST-SW315_215_03.25UB.fm Page 10 Tuesday, April 15, 2003
12:05 PM
CONNECTIONS
If your amplifier has only one set of main speaker output terminals.
Connect the speaker output terminals of the amplifier to the INPUT1 terminals of the subwoofer, and connect the
OUTPUT terminals of the subwoofer to the main speakers.
■
Using one subwoofer (with speaker cables)
<YST-SW315>
Left main speaker
Right main speaker
Subwoofer
Amplifier
To AC outlet
Speaker output
terminals
<YST-SW215>
Left main speaker
Right main speaker
Subwoofer
Amplifier
To AC outlet
Speaker output
terminals
10
YST-SW315_215_03.25UB.fm Page 11 Tuesday, April 15, 2003
12:05 PM
CONNECTIONS
■
Using two subwoofers (with speaker cables)
<YST-SW315>
Right main speaker
Left main speaker
Subwoofer
Subwoofer
Speaker output
terminals
Amplifier
To AC outlet
To AC outlet
<YST-SW215>
Left main speaker
Right main speaker
Subwoofer
Subwoofer
Speaker output
terminals
Amplifier
To AC outlet
To AC outlet
11
YST-SW315_215_03.25UB.fm Page 12 Tuesday, April 15, 2003
12:05 PM
CONNECTIONS
Connecting to the INPUT1/OUTPUT
terminals of the subwoofer
For connection, keep the speaker cables as short as
possible. Do not bundle or roll up the excess part of the
cables. If the connections are faulty, no sound will be heard
from the subwoofer or the speakers, or both of them. Make
sure that the + and – polarity markings of the speaker
cables are observed and set correctly. If these cables are
reversed, the sound will be unnatural and lack bass.
Caution
Do not let the bare speaker wires touch each other, because
this could damage the subwoofer or the amplifier, or both of
them.
■Before connecting
Remove the insulation coating at the extremity of each
speaker cable by twisting the coating off.
Good No Good
U.S.A., Canada and Australia models only
Banana Plug conection are also possible.
1 Tighten the terminal knob.
2 Simply insert the banana plug into the terminal.
<YST-SW215>
1 Press and hold the terminal’s tab, as shown in the
figure.
2 Insert the bare wire.
3 Release your finger from the tab to allow it to lock
securely on the cable’s wire end.
4 Test the firmness of the connection by pulling lightly
on the cable at the terminal.
■How to connect:
<YST-SW315>
1 Loosen the terminal’s knob, as shown in the figure.
2 Insert the bare wire.
Red: positive (+)
Black: negative (–)
3 Tighten the knob.
4 Test the firmness of the connection by pulling lightly
on the cable at the terminal.
Red: positive (+)
Black: negative (–)
Plug in the subwoofer to the AC outlet
After all connections are completed, plug in the subwoofer
and other audio/video components to the AC outlet.
<YST-SW315>
To AC outlet
<YST-SW215>
To AC outlet
12
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12:05 PM
CONTROLS AND THEIR FUNCTIONS
<YST-SW315>
Front panel
Rear panel
(General model)
<YST-SW215>
Front panel
Rear panel
(General model)
13
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CONTROLS AND THEIR FUNCTIONS
1 Power indicator
Lights up in green while the subwoofer is on.
Lights up in red while the subwoofer is set in the
standby mode by the operation of the automatic powerswitching function.
Goes off when the subwoofer is set in the standby
mode.
7 POWER switch
Normally, set this switch to the ON position to use the
subwoofer. In this state, you can turn on the subwoofer
or turn the subwoofer into the standby mode by
pressing the STANDBY/ON button. Set this switch to
the OFF position to completely cut off the subwoofer’s
power supply from the AC line.
2 STANDBY/ON button
Press this button to turn on the power when the
POWER switch is set in the ON position. (The power
indicator lights up in green.)
Press again to set the subwoofer in the standby mode.
(The power indicator goes off.)
8 OUTPUT (TO SPEAKERS) terminals
Can be used for connecting to the main speakers.
Signals from the INPUT1 terminals are sent to these
terminals.
(Refer to “CONNECTIONS” for details.)
Standby mode
The subwoofer is still using a small amount of
power in this mode.
3 B.A.S.S. (Bass Action Selector System) button
When this button is pressed in to the MUSIC position,
the bass sound in audio software is well reproduced.
By pressing the button again so that it pops out at the
MOVIE position, the bass sound in video software is
well reproduced.
4 HIGH CUT control
Adjusts the high frequency cut off point.
Frequencies higher than the frequency selected by this
control are all cut off (and no output).
* One graduation of this control represents 10 Hz.
5 VOLUME control
Adjusts the volume level. Turn the control clockwise to
increase the volume, and counterclockwise to decrease
the volume.
9 INPUT1 (FROM AMPLIFIER) terminals
Used to connect the subwoofer with the speaker
terminals of the amplifier.
(Refer to “CONNECTIONS” for details.
0 INPUT2 terminals
Used to input line level signals from the amplifier.
(Refer to “CONNECTIONS” for details.)
A AUTO STANDBY (HIGH/LOW/OFF) switch
This switch is originally set to the OFF position. By
setting this switch to the HIGH or LOW position, the
subwoofer’s automatic power-switching function
operates as described on page 15. If you do not need
this function, leave this switch in the OFF position.
* Make sure to change the setting of this switch only
when the subwoofer is set in the standby mode by
pressing the STANDBY/ON button.
B PHASE switch
Normally this switch is to be set to the REV (reverse)
position. However, according to your speaker systems
or the listening condition, there may be a case when
better sound quality is obtained by setting this switch
to the NORM (normal) position. Select the better
position by monitoring the sound.
6 VOLTAGE SELECTOR switch
(China, Korea and General models only)
If the preset setting of the switch is incorrect, set the
switch to the proper voltage (110V, 120V, 220V or
240V) of your area.
Consult your dealer if you are unsure of the correct
setting.
WARNING
Be sure to unplug the subwoofer before setting the
VOLTAGE SELECTOR switch correctly.
14
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12:05 PM
AUTOMATIC POWER-SWITCHING FUNCTION
If the source being played is stopped and the input signal is
cut off for 7 to 8 minutes, the subwoofer automatically
switches to the standby mode. (When the subwoofer
switches to the standby mode by the automatic powerswitching function, the power indicator lights up in red.)
When you play a source again, the power of the subwoofer
turns on automatically by sensing audio signals input to the
subwoofer.
This function operates by sensing a certain level of low
frequency input signal. Usually set the AUTO STANDBY
switch to the LOW position. However, if this function does
not operate smoothly, set the switch to the HIGH position.
In the HIGH position, the power will turn on even with a
low level of input signal. But please be aware that the
subwoofer may not switch to the standby mode when there
is an extremely low input signal.
15
* The power might turn on unexpectedly by sensing noise
from other appliances. If that occurs, set the AUTO
STANDBY switch to the OFF position and use the
STANDBY/ON button to switch the power between on
and to the standby mode manually.
This function detects the low-frequency components
below 200 Hz of the input signals (i.e., the explosion in
the action movie, the sound of the bass guitar or the bass
drum, etc.).
* The minutes required to switch the subwoofer to the
standby mode might change by sensing noise from other
appliances.
This function is available only when the power of the
subwoofer is on (by pressing the STANDBY/ON
button).
YST-SW315_215_03.25UB.fm Page 16 Tuesday, April 15, 2003
12:05 PM
ADJUSTING THE SUBWOOFER BEFORE USE
Before using the subwoofer, adjust the subwoofer to obtain the optimum volume and tone balance between the subwoofer
and the main speakers by following the procedures described below.
<YST-SW315>
<YST-SW215>
1
2
3
Set the VOLUME control to minimum (0).
Turn on the power of all the other components.
Make sure that the POWER switch is set to the ON
position, then press the STANDBY/ON button to turn
on the subwoofer.
* The Power indicator lights up in green.
4
Play a source containing low-frequency components
and adjust the amplifier’s volume control to the desired
listening level.
5
Adjust the HIGH CUT control to the position where
the desired response can be obtained.
Normally, set the control to the level a little higher than
the main speaker’s rated minimum reproducible
frequency*.
* The main speaker’s rated minimum reproducible
frequency can be looked up in the speakers’ catalog
or owner’s manual.
6
Increase the volume gradually to adjust the volume
balance between the subwoofer and the main speakers.
Normally, set the control to the level where you can
obtain a little more bass effect than when the
subwoofer is not used. If the desired response cannot
be obtained, adjust the HIGH CUT control and the
VOLUME control again.
7
Set the PHASE switch to the position which gives you
the better bass sound.
Normally, set the switch to the REV (reverse) position.
If the desired response cannot be obtained, set the
switch to the NORM (normal) position.
8
Select “MOVIE” or “MUSIC” according to the played
source.
MOVIE:
When a movie type source is played, the lowfrequency effects are enhanced to allow the listeners
enjoy more powerful sound. (The sound will be thicker
and deeper.)
MUSIC:
When an ordinary music source is played, the
excessive low-frequency components are cut off to
make the sound clearer. (The sound will be lighter and
reproduces the melody line more clearly.)
• Once the volume balance between the subwoofer and
the main speakers is adjusted, you can adjust the
volume of your whole sound system by using the
amplifier’s volume control.
However, if you change the main speakers to others,
you must make this adjustment again.
• For adjusting the VOLUME control, the HIGH CUT
control and the PHASE switch, refer to “Frequency
characteristics” on page 17.
16
YST-SW315_215_03.25UB.fm Page 17 Tuesday, April 15, 2003
12:05 PM
ADJUSTING THE SUBWOOFER BEFORE USE
Frequency characteristics
This subwoofer’s frequency characteristics
<YST-SW315>
<YST-SW215>
dB
dB
HIGH CUT 40 Hz
HIGH CUT 90 Hz
90
HIGH CUT 90 Hz
90
HIGH CUT 140 Hz
HIGH CUT 140 Hz
80
80
70
70
60
60
50
50
40
20
50
100
200
HIGH CUT 40 Hz
40
20
500Hz
50
100
200
500Hz
The figures below show the optimum adjustment of each control and the frequency characteristics when this subwoofer
is combined with a typical main speaker system.
■ EX.1 When combined with a 4” or 5” (10 cm or 13 cm) acoustic suspension, 2 way system main
speakers
<YST-SW315>
<YST-SW215>
dB
dB
90
90
80
80
YST-SW215
YST-SW315
70
PHASE :
Set to the
REV(reverse) position
60
70
Main
speaker
PHASE :
Set to the
REV(reverse) position
50
40
20
50
100
200
60
50
40
20
500Hz
Main
speaker
50
100
200
500Hz
■ EX.2 When combined with an 8” or 10” (20 cm or 25 cm) acoustic suspension, 2 way system main
speakers
<YST-SW315>
<YST-SW215>
dB
dB
90
90
80
80
YST-SW215
YST-SW315
70
PHASE :
Set to the
REV(reverse) position
60
PHASE :
Set to the
REV(reverse) position
Main
speaker
50
40
20
17
70
60
Main
speaker
50
50
100
200
500Hz
40
20
50
100
200
500Hz
YST-SW315_215_03.25UB.fm Page 18 Tuesday, April 15, 2003
12:05 PM
ADVANCED YAMAHA ACTIVE SERVO TECHNOLOGY
The theory of Yamaha Active Servo Technology has been
based upon two major factors, the Helmholtz resonator and
negative-impedance drive. Active Servo Processing
speakers reproduce the bass frequencies through an “air
woofer”, which is a port or opening in the speaker’s
cabinet. This opening is used instead of, and performs the
functions of, a woofer in a conventionally designed
speaker system. Thus, signals of low amplitude within the
cabinet can, according to the Helmholtz resonance theory,
be outputted from this opening as waves of great amplitude
if the size of the opening and the volume of the cabinet are
in the correct proportion to satisfy a certain ratio.
By employing negative-impedance drive circuits, the
amplifier is able to generate precise, low-amplitude, lowfrequency waves with superior damping characteristics.
These waves are then radiated from the cabinet opening as
high-amplitude signals. The system can, therefore, by
employing the negative-impedance output drive amplifier
and a speaker cabinet with the Helmholtz resonator,
reproduce an extremely wide range of frequencies with
amazing sound quality and less distortion.
In order to accomplish this, moreover, the amplitudes
within the cabinet must be both precise and of sufficient
power because these amplitudes must overcome the “load”
presented by the air that exists within the cabinet.
Our new Active Servo Technology, Advanced Yamaha
Active Servo Technology, adopted Advanced Negative
Impedance Converter (ANIC) circuits, which allows the
conventional negative impedance converter to dynamically
vary in order to select an optimum value for speaker
impedance variation. With this new ANIC circuits,
Advanced Yamaha Active Servo Technology can provide
more stable performance and improved sound pressure
compared with the conventional Yamaha Active Servo
Technology, resulting in more natural and dynamic bass
reproduction.
Thus it is this problem that is resolved through the
employment of a new design in which the amplifier
supplies special signals. If the electrical resistance of the
voice coil could be reduced to zero, the movement of the
speaker unit would become linear with respect to signal
voltage. To accomplish this, a special negative-impedance
output-drive amplifier for subtracting output impedance of
the amplifier is used.
Cabinet
High-amplitude
bass sound
The features described above, then, are combined to be the
fundamental structure of the conventional Yamaha Active
Servo Technology.
Air woofer
(Helmholtz resonator)
Port
Advanced Negativeimpedance Converter
Active Servo
Processing
Amplifier
Signals
Signals of low amplitude
18
YST-SW315_215_03.25UB.fm Page 19 Tuesday, April 15, 2003
12:05 PM
TROUBLESHOOTING
Refer to the chart below when this unit does not function properly. If the problem you are experiencing is not listed below
or if the instructions given below do not help, disconnect the power cord and contact your authorized YAMAHA dealer
or service center.
Problem
Cause
What to Do
Power is not supplied even though the
STANDBY/ON button is set to the ON
position.
The power plug is not securely
connected.
Connect it securely.
The POWER switch is set to the OFF
position.
Set the POWER switch to the ON
position.
No sound.
The volume is set to minimum.
Raise the volume up.
Speaker cables are not connected
securely.
Connect them securely.
Speaker cables are not connected
correctly.
Connect them correctly, that is L (left) to
L, R (right) to R, “+” to “+” and
“–” to “–”.
Setting of the PHASE switch is not
proper.
Set the PHASE switch to the other
position.
A source sound with few bass
frequencies is played.
Play a source sound with bass
frequencies.
Set the HIGH CUT control to a higher
position.
It is influenced by standing waves.
Reposition the subwoofer or break up
the parallel surface by placing
bookshelves etc. along the walls.
The POWER switch is set to the OFF
position.
Set the POWER switch to the ON
position.
The STANDBY/ON button is set to the
OFF position.
Set the STANDBY/ON button to the ON
position.
The AUTO STANDBY switch is set to
the OFF position.
Set the AUTO STANDBY switch to the
“HIGH” or “LOW” position.
The level of input signal is too low.
Set the AUTO STANDBY switch to the
“HIGH” position.
There is an influence of noise generated
from external appliances etc.
Move the subwoofer farther away from
such appliances and/or reposition the
connected speaker cables.
Otherwise, set the AUTO STANDBY
switch to the “OFF” position.
The AUTO STANDBY switch is set to
the OFF position.
Set the AUTO STANDBY switch to the
“HIGH” or “LOW” position.
The subwoofer turns into the standby
mode unexpectedly.
The level of input signal is too low.
Set the AUTO STANDBY switch to the
“HIGH” position.
The subwoofer turns on unexpectedly.
There is an influence of noise generated
from external appliances etc.
Move the subwoofer farther away from
such appliances and/or reposition the
connected speaker cables.
Otherwise, set the AUTO STANDBY
switch to the “OFF” position.
Sound level is too low.
The subwoofer does not turn on
automatically.
The subwoofer does not turn into the
standby mode automatically.
19
YST-SW315_215_03.25UB.fm Page 20 Tuesday, April 15, 2003
12:05 PM
SPECIFICATIONS
Type ........ Advanced Yamaha Active Servo Technology
Driver
<YST-SW315>.....25 cm (10”) cone woofer (JA2564)
Magnetic shielding type
<YST-SW215>.......20 cm (8”) cone woofer (JA2165)
Magnetic shielding type
Power Consumption
<YST-SW315> ..................................................... 80W
<YST-SW215> ..................................................... 95W
Standby Power Consumption ...............................0.5W
Amplifier Output (100 Hz, 5 ohms, 10% THD)
<YST-SW315>................................................... 250W
<YST-SW215>................................................... 120W
Dimensions (W x H x D)
<YST-SW315> ............. 350 mm x 430 mm x 382 mm
(13-3/4” x 16-15/16” x 15-1/16”)
<YST-SW215> ............. 290 mm x 360 mm x 322 mm
(11-7/16” x 14-3/16” x 12-11/16”)
Frequency Response
<YST-SW315>..................... 20 Hz - 160 Hz (–10 dB)
<YST-SW215>..................... 28 Hz - 200 Hz (–10 dB)
Weight
<YST-SW315> ...........................19 kg (41 lbs. 13 oz.)
<YST-SW215> ........................11.5 kg (25 lbs. 60 oz.)
Power Supply
USA and Canada models .................. AC 120V, 60 Hz
U.K. and Europe models .................. AC 230V, 50 Hz
Australia model ................................ AC 240V, 50 Hz
China, Korea and General models
............................... AC 110/120/220/240 V, 50/60 Hz
Please note that all specifications are subject to change
without notice.
20
表 4UB-out.fm
Page 1 Thursday, April 24, 2003
1:22 PM
Printed in Indonesia
WB35910-1
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