YST-SW160/90

Active Servo Processing Subwoofer System

Caisson de grave avec asservissement actif

B G R T

01-11,72_YST-SW160/90 ENG 1

OWNER’S MANUAL

MODE D’EMPLOI

BEDIENUNGSANLEITUNG

BRUKSANVISNING

MANUALE DI ISTRUZIONI

MANUAL DE INSTRUCCIONES

00.7.20, 5:07 PM

Thank you for selecting this YAMAHA subwoofer system.

CAUTION: READ THIS BEFORE OPERATING YOUR UNIT.

1.

To assure the finest performance, please read this manual carefully. Keep it in a safe place for future reference.

2.

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 the unit to rain or water.

3.

Never open the cabinet. If something drops into the set, contact your dealer.

4.

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 equipment. Never pull the wire itself.

5.

Do not attempt to clean the unit with chemical solvents; this might damage the finish. Use a clean, dry cloth.

6.

Be sure to read the “TROUBLESHOOTING” section regarding common operating errors before concluding that the unit is faulty.

7.

When not planning to use this unit for long periods of time

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

8.

To prevent lightning damage, disconnect the AC power plug when there is an electrical storm.

9.

Since this unit has a built-in power amplifier, heat will radiate from the rear panel. Therefore, place the unit apart from the walls, allowing enough space above, behind and on the both sides of the unit to prevent fire and damage.

Also, do not position with the rear panel facing down on the floor or other surface.

<

For U.K. and Europe models only

>

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

10.

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.

11.

Vibration generated by super-bass frequencies may cause images on a TV to be distorted. In such a case, move this unit away from the TV set.

12.

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.

13.

If you hear distortion (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.

14.

Voltage Selector (General and China Models only)

The voltage selector on the rear panel of this unit must be set for your local main voltage BEFORE plugging into the AC main supply.

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

2

15.

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.

IMPORTANT

Please record the serial number of this unit in the space below.

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.

WARNING

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,

DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.

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.

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.

SPECIAL INSTRUCTIONS FOR U.K. MODEL

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 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.

01-11,72_YST-SW160/90 ENG 2 00.7.20, 5:07 PM

CONTENTS

Caution ....................................................................... 2

Features ..................................................................... 3

Placement .................................................................. 3

Connections ............................................................... 4

Controls and their functions ....................................... 7

Adjusting volume ........................................................ 8

Advanced YAMAHA Active Servo Technology .......... 10

Troubleshooting ....................................................... 11

Specifications ........................................................... 11

FEATURES

• This subwoofer system employs Advanced YAMAHA Active

Servo Technology which YAMAHA has developed for reproducing higher quality super-bass sound. (Refer to page

10 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 unit can be added easily 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 this unit, this unit’s super-bass sound must 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 Standby function saves you the trouble of pressing the STANDBY/ON button to turn the power on and off.

• You can select bass effect suitable to the source by using the BASS switch.

YST-SW160 only

PLACEMENT

Å ı Ç

( : subwoofer, : main speaker)

One subwoofer will have a good effect on your audio system, however, the use of two subwoofers is recommended to obtain more presence.

If using one subwoofer, it is recommended to place it on the outside of either the right or the left main speaker. (See fig. Å .)

If using two subwoofers, it is recommended to place them on the outside of each main speaker. (See fig. ı .) The placement shown in fig. Ç 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. To prevent this, face the subwoofer system obliquely to the wall as in fig. Å or ı .

Note

There may be a case that you cannot obtain enough superbass sounds from this unit when listening at the middle of the room. This is because “standing waves” have developed between two parallel walls and the bass sounds are canceled.

In such a case, face the unit obliquely to the wall. It also may be necessary to break up the parallel surfaces by placing bookshelves etc. along the walls.

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01-11,72_YST-SW160/90 ENG 3 00.7.20, 5:07 PM

CONNECTIONS

Never plug in the subwoofer and other audio/video components until all connections are completed.

• When making connections between this unit and other components, be sure all connections are made firmly and correctly; L (left) to L, R (right) to R, + to + and – to –.

• This unit can be connected to either the speaker terminals or the line output (pin jack) terminals of the amplifier. Choose one of the connections shown below according to your audio system. Refer also to the owner’s manuals supplied for your audio system.

CONNECTING TO SPEAKER TERMINALS OF THE AMPLIFIER

Using one unit

When your amplifier has one set of speaker terminals

• Disconnect your main speakers from the amplifier if connected, and connect them to the speaker terminals of this unit.

Illustrations of the unit used in this manual are of YST-SW160 unless mentioned otherwise.

Right speaker OUTPUT

TO SPEAKERS

INPUT2 AUTO

STANDBY

PHASE BASS

This unit

OUTPUT

TO SPEAKERS

INPUT2 AUTO

STANDBY

PHASE BASS

FROM AMPLIFIER

INPUT1

LOW HIGH NOM REV MOVIE MUSIC

OFF

POWER

ON

OFF

FROM AMPLIFIER

INPUT1

LOW HIGH NOM REV MOVIE MUSIC

OFF

To AC outlet

Speaker terminals

When your amplifier has two sets of speaker terminals

This unit

OUTPUT

TO SPEAKERS

INPUT2 AUTO

STANDBY

PHASE BASS

FROM AMPLIFIER

INPUT1

OFF

LOW HIGH NOM REV MOVIE MUSIC

POWER

ON

OFF

Right speaker

To AC outlet

OUTPUT

TO SPEAKERS

FROM AMPLIFIER

INPUT1

INPUT2 AUTO

STANDBY

PHASE BASS

LOW HIGH

NOM REV

MOVIE MUSIC

OFF

Amplifier

Speaker terminals

A B

(Both A and B speaker outputs must be ON.)

4

01-11,72_YST-SW160/90 ENG 4 00.7.20, 5:07 PM

Left speaker

Amplifier

Left speaker

Using two units

Disconnect your main speakers from the amplifier if connected, and connect them to the speaker terminals of this unit.

Right speaker Left speaker

This unit

OUTPUT

TO SPEAKERS

INPUT2 PHASE BASS

FROM AMPLIFIER

INPUT1

LOW HIGH NOM REV MOVIE MUSIC

OFF

POWER

ON

OFF

OUTPUT

TO SPEAKERS

INPUT2 AUTO

STANDBY

PHASE BASS

FROM AMPLIFIER

INPUT1

LOW HIGH NOM REV MOVIE MUSIC

OFF

To AC outlet

Speaker terminals

OUTPUT

TO SPEAKERS

FROM AMPLIFIER

INPUT1

INPUT2 AUTO

STANDBY

PHASE BASS

LOW HIGH NOM REV MOVIE MUSIC

OFF

Amplifier

This unit

OUTPUT

TO SPEAKERS

INPUT2 AUTO

STANDBY PHASE BASS

FROM AMPLIFIER

INPUT1

OFF

LOW HIGH

NOM REV

MOVIE MUSIC

POWER

ON

OFF

To AC outlet

Connecting to this unit’s OUTPUT/INPUT terminals

For connections, keep the speaker wires as short as possible.

(Cut the excessive wire, if necessary.) If the connections are faulty, no sound will be heard from the speakers. Make sure that the polarity of the speaker wires is correct, by observing + and – markings. If these wires are reversed, the sound will be unnatural and will lack bass.

Do not let the core of the speaker wires touch each other and do not let them touch the metal parts of this unit as this could damage this unit, your amplifier and/or speakers.

* Banana Plug connections are also possible (except for U.K.

and Europe models). Simply insert the Banana Plug connector into the corresponding terminal.

How to Connect:

Red: positive (+)

Black: negative (–)

1 Unscrew the knob.

2 Insert the core of the wire. [Remove approx. 5 mm (1/4”) insulation from the speaker wires.]

3 Tighten the knob to secure the wire firmly.

5

01-11,72_YST-SW160/90 ENG 5 00.7.20, 5:07 PM

CONNECTING TO LINE OUTPUT (PIN JACK) TERMINALS OF THE AMPLIFIER

• Connect the main speakers to the speaker output terminals of the amplifier.

• Amplifier line output terminals are generally labeled PRE OUT or SUBWOOFER OUT.

• To connect with a YAMAHA DSP amplifier, connect the SUBWOOFER (or LOW PASS etc.) terminal on the rear of the DSP amplifier to either the left (L) or right (R) INPUT 2 terminal.

Using one unit

Left speaker Right speaker

This unit

OUTPUT

TO SPEAKERS

INPUT2 AUTO

STANDBY

PHASE BASS

OFF

LOW HIGH NOM REV MOVIE MUSIC

POWER

ON

OFF

OUTPUT

TO SPEAKERS

INPUT2 AUTO

STANDBY

PHASE BASS

FROM AMPLIFIER

INPUT1

LOW HIGH

NOM REV MOVIE MUSIC

OFF

To AC outlet

Pin plug cords

Amplifier

‹YAMAHA DSP amplifier›

SUBWOOFER

‹Amplifier›

PRE OUT

Using two units

Left speaker

OUTPUT

TO SPEAKERS

INPUT2 AUTO

STANDBY

PHASE BASS

This unit

OUTPUT

TO SPEAKERS

INPUT2 AUTO

STANDBY

PHASE BASS

FROM AMPLIFIER

INPUT1

LOW HIGH NOM REV MOVIE MUSIC

OFF

POWER

ON

OFF

FROM AMPLIFIER

INPUT1

LOW HIGH

NOM REV MOVIE MUSIC

OFF

This unit

OUTPUT

TO SPEAKERS

INPUT2 AUTO

STANDBY

PHASE BASS

FROM AMPLIFIER

INPUT1 OFF

LOW HIGH NOM REV MOVIE MUSIC

POWER

ON

OFF

OUTPUT

TO SPEAKERS

INPUT2 AUTO

STANDBY

PHASE BASS

FROM AMPLIFIER

INPUT1

LOW HIGH NOM REV MOVIE MUSIC

OFF

Pin plug cords

Right speaker

Amplifier

To AC outlet To AC outlet

Notes on the above connections

• When connected 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.

• When connecting this unit to a monaural line output terminal of the amplifier, connect to either the left or right INPUT 2 terminal.

• For using a power amplifier and a preamplifier, the preamplifier must have two sets of PRE OUT terminals. If your preamplifier has only one set of PRE OUT, connect this unit to the speaker terminals. (See page 4.)

6

01-11,72_YST-SW160/90 ENG 6 00.7.20, 5:07 PM

Front panel

CONTROLS AND THEIR FUNCTIONS

STANDBY/ON HIGH CUT VOLUME

40 Hz 140 Hz 0 10

YST-SW160

STANDBY/ON HIGH CUT VOLUME

YST-SW90

STANDBY/ON HIGH CUT VOLUME

~ Ÿ

40 Hz

!

140 Hz 0

⁄

10

~ Ÿ

50 Hz

!

150 Hz 0

⁄

10

Rear panel

POWER

ON

OFF

@

OUTPUT

TO SPEAKERS

INPUT2 AUTO

STANDBY

PHASE BASS

FROM AMPLIFIER

INPUT1

LOW HIGH

OFF

NOM REV

MOVIE MUSIC

OUTPUT

TO SPEAKERS

INPUT2 AUTO

STANDBY

PHASE BASS

POWER

ON

OFF

FROM AMPLIFIER

INPUT1

LOW HIGH NOM REV MOVIE MUSIC

OFF

¤ # ‹

~

Power indicator

Lights up while this unit is ON.

* If the AUTO STANDBY switch on the rear panel is set to the LOW or HIGH position, this indicator is illuminated dimly when no signal is input to this unit.

Ÿ

STANDBY/ON button

Each press of this button turns the unit on and off (on standby). A small amount of power is always consumed even while this unit is on standby.

!

HIGH CUT control

Adjusts the high frequency cut off point.

Frequencies higher than the frequency selected with this control are all cut off (and not output).

⁄

VOLUME control

Adjusts the volume level.

@

Main POWER switch

Normally, leave this switch to the ON position. When you will not use this unit for a long period, set this switch to the

OFF position.

¤

AUTO STANDBY switch

With this switch, you can activate the Automatic Standby function. Normally, set the switch to the LOW position.

To cancel this function, set the switch to the OFF position.

* Change the setting of this switch only when the power of this unit is on standby (by setting the STANDBY/ON button to OFF).

Automatic Standby function

When you play a source, the power of this unit turns on automatically by sensing audio signals input to this unit. This unit turns into the standby mode automatically if the source being played is stopped or the low frequency input signal is cut off for several minutes.

This function will operate by sensing a certain level of low frequency input signal. Its sensitivity is high in the HIGH position and low in the LOW position of the AUTO STANDBY switch. In the HIGH position, the power will turn on even with a low level of input signal, but on the other hand this unit may not turn into the standby mode when there is an input signal even if its level is extremely low.

* There may be a case that the power turns on unexpectedly by sensing noise from other appliances. If it occurs, set the

AUTO STANDBY switch to the OFF or LOW position.

* The level of low frequency input signal differs with each source, and each different part on the same source. So, this function may not operate properly depending on some sources.

This function is available only when the power of this unit is on (by setting the STANDBY/ON button Ÿ to ON).

#

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 NOM

(normal) position. Select the better position by monitoring the sound.

‹

BASS switch

YST-SW160 only

By setting this switch to the MOVIE position, the bass sound in video software is well reproduced. By setting it to the MUSIC position, the bass sound in audio software is well reproduced.

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01-11,72_YST-SW160/90 ENG 7 00.7.20, 5:08 PM

ADJUSTING VOLUME

Adjustment of the HIGH CUT control, the VOLUME control and the PHASE switch needs to be changed according to the main speakers, listening condition, source, etc.

Front panel

YST-SW160

STANDBY/ON HIGH CUT VOLUME

YST-SW90

STANDBY/ON HIGH CUT VOLUME

Rear panel

PHASE

NOM REV

40 Hz 140 Hz 0 10

50 Hz 150 Hz 0 10

3 5 1,6 3 5 1,6 7

1

Set the VOLUME control to minimum (0).

2

Turn on the other components.

3

Press the STANDBY/ON button to turn on this unit.

4

Play any source and adjust the amplifier’s volume control to the desired listening level.

5

Adjust the HIGH CUT control according to the main speakers connected.

Normally, set the control to the main speaker’s rated minimum reproducible frequency*. If the desired response cannot be obtained, adjust the control again to your preference.

* The main speaker’s rated minimum reproducible frequency can be looked up in the speakers’ catalog or owner’s manual.

6

Turn up the VOLUME control gradually to adjust the volume balance between this unit and the main speakers.

Normally, set the control to the level where you can obtain a little more bass effect than when this unit is not used.

If the desired response cannot be obtained, adjust the control again to your preference.

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 NOM (normal) position.

Once the volume balance between this unit and the main speakers is adjusted, you can adjust the volume of your whole sound system by using only the amplifier’s volume control.

FREQUENCY RESPONSE

This unit’s frequency response

YST-SW160 dB

90

HIGH CUT 40 Hz

HIGH CUT 90 Hz

HIGH CUT 140 Hz

80

8

70

60

50

40

20 50 100 200 500Hz dB

90

80

70

60

50

40

20

YST-SW90

50

HIGH CUT 100 Hz

HIGH CUT 150 Hz

HIGH CUT 50 Hz

100 200 500Hz

01-11,72_YST-SW160/90 ENG 8 00.7.20, 5:08 PM

The figures below show the optimum adjustment of each control and the frequency characteristics when this unit 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

HIGH CUT VOLUME

YST-SW160 dB

Combined frequency response

90

80

40 Hz 140 Hz 0 10

70

* One graduation of this control represents 10 Hz.

60

PHASE–Set to the REV

(reverse) position.

50

40

20

Main speaker’s response

50

HIGH CUT VOLUME

YST-SW90 dB

Combined frequency response

90

100

YST-SW160

200

80

50 Hz 150 Hz 0 10

70

* One graduation of this control represents 10 Hz.

60

500Hz

PHASE–Set to the REV

(reverse) position.

50

40

20

Main speaker’s response

50

YST-SW90

100 200 500Hz

EX.2

When combined with an 8” or 10” (20 cm or 25 cm) acoustic suspension, 2 way system main speakers

HIGH CUT VOLUME

YST-SW160 dB

Combined frequency response

90

HIGH CUT VOLUME

YST-SW90 dB

Combined frequency response

90

80

40 Hz 140 Hz 0 10

70

* One graduation of this control represents 10 Hz.

60

PHASE–Set to the REV

(reverse) position.

50

40

20

Main speaker’s response

50

YST-SW160

100 200

80

50 Hz 150 Hz 0 10

70

* One graduation of this control represents 10 Hz.

60

500Hz

PHASE–Set to the REV

(reverse) position.

50

40

20

Main speaker’s response

50

YST-SW90

100 200 500Hz

01-11,72_YST-SW160/90 ENG 9 00.7.20, 5:08 PM

9

ADVANCED YAMAHA ACTIVE SERVO TECHNOLOGY

The theory of Yamaha Active Servo Technology has been based upon two major factors, the Helmholtz resonator and negativeimpedance 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 output from this opening as waves of great amplitude if the design is such that the size of the opening and the volume of the cabinet are in the correct proportion to satisfy a certain ratio.

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.

Thus it is this problem that is resolved through the employment of a design in which the amplifier functions to supply 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, and, to accomplish this, a special negative-impedance output-drive amplifier for subtracting output impedance of the amplifier is used.

By employing negative-impedance drive circuits, the amplifier is able to generate precise, low-amplitude low-frequency waves with superior damping characteristics, and these waves are then radiated from the cabinet opening as high-amplitude signals. The system can, therefore, by employing the negativeimpedance 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.

The features described above, then, are combined to be the fundamental structure of the conventional Yamaha Active Servo

Technology.

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 maximum sound pressure compared with the conventional

Yamaha Active Servo Technology, resulting in more natural and energetic bass reproduction.

High-amplitude bass sound

Cabinet

Port

Advanced Negative-

Impedance Converter

Active

Servo

Processing

Amplifier

Air woofer

(Helmholtz resonator)

Signals

Signals of low amplitude

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01-11,72_YST-SW160/90 ENG 10 00.7.20, 5:08 PM

TROUBLESHOOTING

If the unit fails to operate normally, check the following points to determine whether the fault can be corrected by the simple measures suggested. If it cannot be corrected, or if the fault is not listed in the SYMPTOM column, disconnect the power cord and contact your authorized YAMAHA dealer or service center for help.

SYMPTOM

The power cannot be turned on.

No sound.

Sound level is too low.

The unit does not turn on automatically.

The unit turns off (on standby) unexpectedly.

The unit turns on unexpectedly.

CAUSE

The power cord is not plugged in, or the Main

POWER switch is set to the OFF position.

The VOLUME control is set to 0.

Speaker wires are not connected securely.

Speaker wires are connected incorrectly.

Setting of the PHASE switch is not proper.

A source sound with few bass frequencies is played.

It is influenced by standing waves.

REMEDY

Plug the power cord into an AC outlet and/or set the

Main POWER switch to the ON position.

Turn the VOLUME control to right.

Connect them securely.

Connect them correctly; L (left) to L, R (right) to R, + to

+ and – to –.

Set the switch to the other position.

Play a source sound with bass frequencies.

Set the HIGH CUT control to a higher position.

Reposition the subwoofer or break up the parallel surface by placing bookshelves etc. along the walls.

Set the Main POWER switch to the ON position.

The Main POWER switch is set to the OFF position.

The STANDBY/ON button is set to OFF.

The AUTO STANDBY switch is set to the OFF position.

The level of input signal is too low.

The level of input signal is too low.

An influence of noise generated from external equipment etc.

Set the STANDBY/ON button to ON.

Set the AUTO STANDBY switch to the HIGH or LOW position.

Set the AUTO STANDBY switch to the HIGH position.

Set the AUTO STANDBY switch to the HIGH position.

Move the unit farther away from such equipment and/ or change the position of connected speaker wires.

Otherwise, set the AUTO STANDBY switch to the

OFF position.

SPECIFICATIONS

YST-SW160

Type ................ Active Servo Processing Subwoofer System

Speaker Unit .................... 20 cm (8”) cone woofer (JA2160) magnetic shielding type x 2

Amplifier Output ........................................... 150 W/5 ohms

High-Cut Filter ......................... 40 Hz–140 Hz (–24 dB/oct.)

Frequency Response ..................... 20 Hz–160 Hz (–10 dB)

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

General and China models

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

..................

(Adjustable with Voltage Selector)

YST-SW90

Type ................ Active Servo Processing Subwoofer System

Speaker Unit .................... 20 cm (8”) cone woofer (JA2161) magnetic shielding type

Amplifier Output ........................................... 100 W/5 ohms

High-Cut Filter ......................... 50 Hz–150 Hz (–24 dB/oct.)

Frequency Response ..................... 23 Hz–170 Hz (–10 dB)

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

General and China models

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

(Adjustable with Voltage Selector)

Power Consumption .................................................... 100 W

Dimensions (W

×

H

×

D) ........... 235 mm

×

602 mm

×

463 mm

(9-5/16” × 23-3/4” × 18-1/4”)

Weight ...................................................... 20 kg (44 lbs. 1 oz.)

* Design and specifications are subject to change without notice.

Power Consumption ...................................................... 80 W

Dimensions (W

×

H

×

D) ........... 235 mm

×

485 mm

×

409 mm

(9-5/16”

×

19-1/8”

×

16-1/8”)

Weight .................................................... 14 kg (30 lbs. 13 oz.)

* Design and specifications are subject to change without notice.

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YAMAHA ELECTRONICS CORPORATION, USA 6660 ORANGETHORPE AVE., BUENA PARK, CALIF. 90620, U.S.A.

YAMAHA CANADA MUSIC LTD. 135 MILNER AVE., SCARBOROUGH, ONTARIO M1S 3R1, CANADA

YAMAHA ELECTRONIK EUROPA G.m.b.H. SIEMENSSTR. 22-34, 25462 RELLINGEN BEI HAMBURG, F.R. OF GERMANY

YAMAHA ELECTRONIQUE FRANCE S.A. RUE AMBROISE CROIZAT BP70 CROISSY-BEAUBOURG 77312 MARNE-LA-VALLEE CEDEX02, FRANCE

YAMAHA ELECTRONICS (UK) LTD. YAMAHA HOUSE, 200 RICKMANSWORTH ROAD WATFORD, HERTS WD1 7JS, ENGLAND

YAMAHA SCANDINAVIA A.B. J A WETTERGRENS GATA 1, BOX 30053, 400 43 VÄSTRA FRÖLUNDA, SWEDEN

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01-11,72_YST-SW160/90 ENG 12 00.7.20, 5:08 PM

Printed in Malaysia V304660