Yamaha YST-SW160-90, YST-SW160 User Manual

YST-SW160/90

Active Servo Processing Subwoofer System

Caisson de grave avec asservissement actif

B G R T

English

OWNER’S MANUAL

MODE D’EMPLOI

BEDIENUNGSANLEITUNG

BRUKSANVISNING

MANUALE DI ISTRUZIONI

MANUAL DE INSTRUCCIONES

GEBRUIKSAANWIJZING

1

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.

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.

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.

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.

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

CONTENTS

English

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

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

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

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

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

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.

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

Advanced Y AMAHA Active Servo Technology..........10

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

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

• 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.

• The Automatic Standby function saves you the trouble of
pressing the ST ANDBY/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

( : 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.

Çı

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.

3

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.

Right speaker

This unit

OUTPUT INPUT2

AUTO
STANDBY

TO SPEAKERS

LOWHIGH

FROM AMPLIFIER

OFF

INPUT1

POWER

ON

OFF

PHASE BASS

NOMREV

MOVIEMUSIC

T o AC outlet

OUTPUT INPUT2

TO SPEAKERS

FROM AMPLIFIER

INPUT1

Speaker terminals

AUTO

STANDBY

LOW HIGH

OFF

PHASE BASS

NOM REV

MOVIE MUSIC

Illustrations of the unit used in this
manual are of

YST-SW160 unless

mentioned otherwise.

Left speaker

Amplifier

When your amplifier has two sets of speaker terminals

This unit

OUTPUT INPUT2

AUTO

PHASE BASS

STANDBY

TO SPEAKERS

NOMREV

MOVIEMUSIC

LOWHIGH

FROM AMPLIFIER

OFF

INPUT1

POWER

ON

OFF

Right speaker

Speaker terminals

AB

4

T o AC outlet

OUTPUT INPUT2

TO SPEAKERS

FROM AMPLIFIER

INPUT1

STANDBY

OFF

AUTO

LOW HIGH

PHASE BASS

NOM REV

MOVIE MUSIC

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

Left speaker

Amplifier

Using two units

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

English

Right speaker

This unit

OUTPUT INPUT2

AUTO

PHASE BASS

STANDBY

TO SPEAKERS

NOMREV

MOVIEMUSIC

LOWHIGH

FROM AMPLIFIER

OFF

INPUT1

POWER

ON

OFF

T o AC outlet

OUTPUT INPUT2

TO SPEAKERS

FROM AMPLIFIER

INPUT1

Speaker terminals

STANDBY

LOW HIGH

OFF

Left speaker

AUTO

PHASE BASS

NOM REV

MOVIE MUSIC

OUTPUT INPUT2

TO SPEAKERS

FROM AMPLIFIER

INPUT1

AUTO

STANDBY

LOW HIGH

OFF

Amplifier

PHASE BASS

NOM REV

MOVIE MUSIC

This unit

OUTPUT INPUT2

AUTO

PHASE BASS

STANDBY

TO SPEAKERS

NOMREV

LOWHIGH

FROM AMPLIFIER

OFF

INPUT1

POWER

ON

OFF

MOVIEMUSIC

T o 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.

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.

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

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

5

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

Amplifier

Using two units

Left speaker

This unit

OUTPUT INPUT2

AUTO

PHASE BASS

STANDBY

TO SPEAKERS

NOMREV

MOVIEMUSIC

LOWHIGH

FROM AMPLIFIER

OFF

INPUT1

POWER

ON

OFF

OUTPUT INPUT2

TO SPEAKERS

AUTO

STANDBY

OUTPUT INPUT2

TO SPEAKERS

FROM AMPLIFIER

INPUT1

PHASE BASS

‹YAMAHA DSP amplifier›T o AC outlet

AUTO

PHASE BASS

STANDBY

NOM REV

LOW HIGH

OFF

MOVIE MUSIC

SUBWOOFER

‹Amplifier›

PRE OUT

OUTPUT INPUT2

TO SPEAKERS

AUTO

STANDBY

Right speaker

Pin plug
cords

Right speaker

PHASE BASS

FROM AMPLIFIER

INPUT1

LOW HIGH

OFF

NOM REV

MOVIE MUSIC

FROM AMPLIFIER

INPUT1

OFF

LOW HIGH

NOM REV

MOVIE MUSIC

Pin plug

This unit This unit

OUTPUT INPUT2

AUTO

PHASE BASS

STANDBY

TO SPEAKERS

NOMREV

MOVIEMUSIC

LOWHIGH

FROM AMPLIFIER

OFF

INPUT1

POWER

ON

OFF

OUTPUT INPUT2

TO SPEAKERS

FROM AMPLIFIER

INPUT1

AUTO

PHASE BASS

STANDBY

NOMREV

LOWHIGH

OFF

POWER

ON

OFF

MOVIEMUSIC

Amplifier

cords

T o AC outlet T o 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

Front panel

CONTROLS AND THEIR FUNCTIONS

STANDBY/ON HIGH CUT VOLUME

140 Hz

010

40 Hz

YST-SW160

STANDBY/ON HIGH CUT VOLUME

140 Hz

40 Hz

010

YST-SW90

STANDBY/ON HIGH CUT VOLUME

150 Hz

50 Hz

English

010

Ÿ

Rear panel

POWER

OUTPUT INPUT2

AUTO

PHASE BASS

STANDBY

ON

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.

STANDBY/ON button

Ÿ

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).

TO SPEAKERS

NOM REV

MOVIEMUSIC

LOW HIGH

FROM AMPLIFIER

OFF

INPUT1

POWER

ON

OFF

!⁄ Ÿ!⁄~~

OUTPUT INPUT2

TO SPEAKERS

FROM AMPLIFIER

INPUT1

STANDBY

LOW HIGH

OFF

AUTO

PHASE BASS

NOM REV

MOVIE MUSIC

¤#‹

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

‹

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.

YST-SW160 only

7

ADJUSTING VOLUME

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

Front panel

Rear panel

PHASE

YST-SW160 YST-SW90

STANDBY/ON HIGH CUT VOLUME

40 Hz

140 Hz

010

3 5 1,6 3 5 1,6

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.

STANDBY/ON HIGH CUT VOLUME

50 Hz

150 Hz

010

NOM REV

7

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

80

70

60

50

40

20 50 100 200 500Hz

HIGH CUT 40 Hz

HIGH CUT 90 Hz

HIGH CUT 140 Hz

dB

90

80

70

60

50

40

20 50 100 200 500Hz

8

YST-SW90

HIGH CUT 100 Hz

HIGH CUT 150 Hz

HIGH CUT 50 Hz

20 50 100 200 500Hz

40

50

60

70

80

90

dB

YST-SW90

Combined frequency response

20 50 100 200 500Hz

40

50

60

70

80

90

dB

YST-SW90

Combined frequency response

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

English

HIGH CUT VOLUME

140 Hz

40 Hz

010

* One graduation of this

control represents 10 Hz.

PHASE–Set to the REV

(reverse) position.

YST-SW160

dB

90

80

70

60

50

40

20 50 100 200 500Hz

Combined frequency response

YST-SW160

Main
speaker’s
response

HIGH CUT

VOLUME

150 Hz50 Hz

010

* One graduation of this

control represents 10 Hz.

PHASE–Set to the REV

(reverse) position.

YST-SW90

Main
speaker’s
response

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

YST-SW90

Main
speaker’s
response

HIGH CUT VOLUME

140 Hz

40 Hz

010

* One graduation of this

control represents 10 Hz.

PHASE–Set to the REV

(reverse) position.

YST-SW160

dB

Combined frequency response

90

80

70

60

50

40

20 50 100 200 500Hz

Main
speaker’s
response

YST-SW160

HIGH CUT

VOLUME

150 Hz50 Hz

010

* One graduation of this

control represents 10 Hz.

PHASE–Set to the REV

(reverse) position.

9

ADVANCED YAMAHA ACTIVE SERVO TECHNOLOGY

The theory of Y amaha Active Servo T echnology 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 Y amaha Active Servo
Technology.

Our new Active Servo T echnology — Advanced Y amaha Active
Servo T echnology — 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
T echnology can provide more stable performance and improved
maximum sound pressure compared with the conventional
Y amaha Active Servo Technology, resulting in more natural and
energetic bass reproduction.

High-amplitude
bass sound

Cabinet

Port

Advanced Negative­Impedance Converter

Signals of low amplitude

Active
Servo
Processing
Amplifier

Air woofer
(Helmholtz resonator)

Signals

10

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 CAUSE REMEDY

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.

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.

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.

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.

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.

English

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.

11

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
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