Yamaha YST SW012 User Manual

YST-SW012

SUBWOOFER SYSTEM

UB

OWNER’S MANUAL

i

IMPORTANT SAFETY INSTRUCTIONS

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.

• Explanation of graphic 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.

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 unit.

Retain this Owner’s Manual in a safe place for future
reference.

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.

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 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.

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.

15

Be sure to allow spaces of at least 20cm above,
behind and both sides of the unit.

16

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.

i

FCC INFORMATION (for US customers)

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:

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:

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 or uses radio
frequencies and, if not installed and used in
accordance with the instructions in the user’s
manual, may cause interference harmful to the
operation of other electronic devices.

When connecting this product to

This product has been tested and found to

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 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
circuits (circuit breaker or fuse) or install AC line
filter(s).

• In the case of radio or TV interference, relocate or
reorient the antenna. If the antenna lead-in is 300 ohm
ribbon lead, change the lead-in to a coaxial type cable.

If these corrective measures do not produce satisfactory
results, please contact the local retailer authorized to
distribute this product. If you cannot 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.

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
following instructions.

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.

We Want You Listening for a Lifetime

Yamaha and the Electronic Industries Association’s Con­sumer Electronics Group want you to get the most enjoy­ment out of your equipment by playing it at a safe level
— a level that lets the sound come through loud and
clear without annoying blaring or distortion — and, most
importantly, without damaging your sensitive hearing.

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.

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 that you
avoid prolonged exposure to excessive
volume levels.

ii

Precautions: Read this before operating this unit

•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 any foreign objects drop 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 of 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 (i.e.,

vacation, etc.), disconnect the AC power plug from the
wall outlet.

• 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.

• 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 subwoofer 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.

• Install this unit near the wall outlet and where the AC
power plug can be reached easily.

• Secure placement or installation is the owner’s
responsibility. YAMAHA shall not be liable for any
accident caused by improper placement or
installation of the subwoofer.

WARNING

TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS UNIT TO RAIN
OR MOISTURE.

As long as this unit is connected to the AC wall out­let, it is not disconnected from the AC power source
even if you turn off this unit by POWER.

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.

iii

• VOLTAGE SELECTOR
(For China, Korea, Asia 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.

Table of contents

Precautions: Read this before operating this unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Supplied accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Positioning the subwoofer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Basic connection example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Connecting components and the subwoofer to AC power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Using the subwoofer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Pre-adjusting the subwoofer volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Advanced Yamaha Active Servo Technology II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Frequency response. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1

Introduction

Features

• This subwoofer system employs Advanced

Yamaha Active Servo Technology II which
Yamaha has developed for reproducing higher
quality super-bass sound. (Refer to page 5 for
details on Advanced Yamaha Active Servo Tech­nology II) This super bass sound adds a more
realistic, theater-in-the-home effect to your ste­reo system.

• This subwoofer system is equipped with a linear

port unique to Yamaha that provides smooth
bass response during playback, minimizing
extraneous noise not included in the original
input signal.

Positioning the subwoofer

It is recommended to place it on the outside of
either the right or the left front speaker. (See fig.

A

.) The placement shown in fig. is also
possible, however, if the subwoofer system is
placed directly facing the wall, the bass effect may
lessen 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. .

B

A

Supplied accessories

Please confirm that the following item is included
in the package.

Non-skid pads
(1 set, 4 pieces)

Use the non-skid pads

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 cable
(5 m)

A

( : subwoofer, : front speaker)

B

Note

There may be a case that you cannot obtain enough
super-bass 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.

2

Connections

Caution: Plug the power cables for the sub­woofer and other audio/video components into
an AC outlet only after you complete all other
connections.

Basic connection example

Connect a subwoofer cable to the output jack of
your AV amplifier and to the INPUT jack of the
subwoofer.

Amplifier (
amplifiers may differ in appearance.

The rear panel of various

)

Connecting components and the subwoofer to AC power

After you complete a subwoofer connection, plug
the amplifier, other audio/video component, and
the subwoofer into an AC outlet of appropriate
voltage.

Subwoofer rear panel

INPUT

VOLUME

POWER

ON

OFF

INPUT

To AC outlet

3

Using the subwoofer

Pre-adjusting the subwoofer volume

4

INPUT

Subwoofer rear panel

3

INPUT

POWER

VOLUME

ON

OFF

POWER switch

1

1

Power indicator

Lights up in GREEN when the

(2) is turned ON; turns off when the

switch is turned OFF.

POWER switch

2

Press this switch to the ON position to turn on

the power to the subwoofer. When the power of

the subwoofer is on, the power indicator (1) on

the rear panel lights up in green. Press this

switch again to set it to the OFF position to turn

off the power of the subwoofer.

VOLUME

2

POWER

POWER

ON

OFF

Before you use the subwoofer, first adjust the vol­ume balance between the subwoofer and the front
speakers by following the procedure below.

Set the

1.

2.

3.

VOLUME control to minimum (0).

Turn on the power to all other components.
Press the

POWER switch to the ON position.

The power indicator on the rear panel lights up
in green.

Play a source that contains bass signal. Adjust

4.

the amplifier’s volume control to the desired lis­tening level.

5.

Rotate the

VOLUME

control gradually to adjust
the volume balance between the subwoofer and
the other speakers. To enjoy natural bass sound,
keep the subwoofer volume at a level where it is
barely distinguishable from other speakers.

Adjust the volume of the entire sound system

6.

using the amplifier’s volume control.

Note:

It is recommended to set the

VOLUME

control about in the middle
position when using in a multi channel
home theater system.

VOLUME

VOLUME control

3

Adjusts the volume level. Turn the control
clockwise to increase the volume, and counter­clockwise to decrease the volume.

4

INPUT terminal

Input terminal for line level signals from the
amplifier.

4

Advanced Yamaha Active Servo Technology II

In 1998, Yamaha brought to the marketplace
speaker systems utilizing YST (

Technology

) to give powerful, high quality bass

Yamaha Active Servo

reproduction. This technique uses a direct
connection between the amplifier and speaker,
allowing accurate signal transmission and precise
speaker control.

As this technology uses speaker units controlled by
the negative impedance drive of the amplifier and
resonance generated between the speaker cabinet
volume and port, it creates more resonant energy
(the “air woofer” concept) than the standard bass

High-amplitude
bass sound

Cabinet

Port

Advanced impedance
Converter

reflex method. This allows for bass reproduction
from much smaller cabinets than was previously
possible.
Yamaha’s newly developed Advanced YST II adds
many refinements to Yamaha Active Servo
Technology, allowing better control of the forces
driving the amplifier and speaker. From the ampli­fier’s point of view, the speaker impedance changes
depending on the sound frequency. Yamaha
developed a new circuit design combining
negative-impedance and constant-current drives,
which provides a more stable performance and
clear bass reproduction without any murkiness.

Air woofer
(Helmholtz resonator)

Signals of low amplitude

Active Servo
Processing
Amplifier

Signals

5

Troubleshooting

Refer to the chart below if the unit does not function properly. If the problem you are experiencing is not
listed, or if the instructions fail to help you resolve the problem, disconnect the power cord and contact your
authorized Yamaha dealer or service center.

Problem Cause Remedy

Power is not supplied even though the
POWER switch is set to the ON position.

No sound.

Sound level is too low.

The power plug is not securely
connected.

The VOLUME control is set to 0. Turn the VOLUME control to the

A subwoofer cable is not connected
securely.

You are playing a sound source that
includes inadequate bass frequencies.

The sound level has been diminished
by standing waves.

The input signal is too small Turn up the volume.

Turn the power switch OFF, then
connect the power plug securely.

right (clockwise).
Connect a subwoofer cable securely.

Play a sound source that includes
more bass frequencies.

Reposition the subwoofer, or break
up the parallel wall surface by
placing bookshelves or other large
objects along the wall.

6

Specifications

Type

.....Advanced Yamaha Active Servo Technology II

Driver

................................. 20 cm (8") cone woofer

Magnetically shielded type

Output Power

Dynamic Power

.................................................50 W

.........................................100 W, 5

Frequency response

100 dB

Ω

90

Input Impedance

Frequency Response

Input Sensitivity

...............................................12 k

................... 28 Hz – 200 Hz

.............50 mV (50 Hz, 50 W/5 Ω)

Power Supply

[U.S.A. and Canada models] ......... AC 120 V, 60 Hz

[Australia model]............................ AC 240 V, 50 Hz

[U.K. and Europe models].............. AC 230 V, 50 Hz

[

China, Korea, Asia and

General models]

........................... AC 110–120/220–240 V, 50/60 Hz

Power Consumption

......................................45 W

Dimensions (W x H x D)

..................................290 mm x 290 mm x 328 mm

(11-13/32” x 11-13/32” x 12-29/32”)

Weight....................................... 8.5 kg (18-3/4 lbs.)

Ω

80

70

60

50

40

20 50 100 200 500 Hz

Frequency response graph*

*This diagram does not depict actual frequency
response characteristics accurately.

Specifications are subject to change without notice.

7

YAMAHA ELECTRONICS CORPORATION, USA
YAMAHA CANADA MUSIC LTD.
YAMAHA ELECTRONIK EUROPA G.m.b.H.
YAMAHA ELECTRONIQUE FRANCE S.A.
YAMAHA ELECTRONICS (UK) LTD.
YAMAHA SCANDINAVIA A.B.
YAMAHA MUSIC AUSTRALIA PTY, LTD.

135 MILNER AVE., SCARBOROUGH, ONTARIO M1S 3R1, CANADA

SIEMENSSTR. 22-34, 25462 RELLINGEN BEI HAMBURG, GERMANY

RUE AMBROISE CROIZAT BP70 CROISSY-BEAUBOURG 77312 MARNE-LA-VALLEE CEDEX02, FRANCE

YAMAHA HOUSE, 200 RICKMANSWORTH ROAD WATFORD, HERTS WD18 7GQ, ENGLAND

J A WETTERGRENS GATA 1, BOX 30053, 400 43 VÄSTRA FRÖLUNDA, SWEDEN

17-33 MARKET ST., SOUTH MELBOURNE, 3205 VIC., AUSTRALIA

6660 ORANGETHORPE AVE., BUENA PARK, CALIF. 90620, U.S.A.

2006 All rights reserved.

©

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