Yamaha YST-SW325 OWNER'S MANUAL

Yamaha YST-SW325 OWNER'S MANUAL

YST-SW325

Subwoofer System

UB

OWNER’S MANUAL

i

IMPORTANT SAFETY 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.

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.

5

6

7

3

4

1

2

Read these instructions.

Keep these instructions.

Heed all warnings.

Follow all instructions.

Do not use this apparatus near water.

Clean only with dry cloth.

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.

• 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.

FCC INFORMATION (for US customers)

1

2

3

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.

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.

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.

We Want You Listening For A

Lifetime

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.

ii

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).

• 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.

• 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 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.

• 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 speakers.

iii

• VOLTAGE SELECTOR

(Asia and General models only)

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.

Standby mode

When this unit is set in standby mode by pressing the

STANDBY/ON button on the control 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.

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.

CONTENTS

FEATURES ....................................................................2

SUPPLIED ACCESSORIES ...........................................2

PLACEMENT ................................................................3

CONNECTIONS ........................................................... 4

1

Connecting to line output (pin jack) terminals

2

of the amplifier .................................................... 4

Connecting to speaker output terminals of

the amplifier .......................................................... 6

Connecting to the INPUT1/ OUTPUT terminals

of the subwoofer .........................................................8

Plug in the subwoofer to the AC outlet ......................8

CONTROLS AND THEIR FUNCTIONS .................... 9

AUTO STANDBY FUNCTION ................................. 11

Activate the AUTO STANDBY function.................11

ADJUSTING THE SUBWOOFER

BEFORE USE ............................................................. 12

Frequency characteristics .........................................13

ADVANCED YAMAHA ACTIVE SERVO

TECHNOLOGY II ....................................................... 14

TROUBLESHOOTING ............................................... 15

SPECIFICATIONS ..........................................Backcover

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

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 14 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 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 front speakers. You can create the best sound quality for various listening conditions by using the

HIGH CUT control and the PHASE switch.

• The AUTO 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 for the source by using the B.A.S.S. button.

• 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.

SUPPLIED ACCESSORIES

After unpacking, check that the following parts are contained.

Non-skid pads

QD-Bass Technology

QD-Bass (Quatre Dispersion Bass) technology is a

Yamaha unique technology to radiate the sound efficiently in four horizontal direction.

2

PLACEMENT

The position of the subwoofer is not so critical since low bass sounds are not highly directional. For a sonorous sound field, although you can obtain a good effect with one subwoofer, the use of two subwoofers is recommended.

If using one subwoofer, we recommend that you place it on the outside of either the right or the left front speaker. (See fig.

A

.) If using two subwoofers, we recommend that you place them on the outside of each front 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

.

( : subwoofer, : front speaker)

A B C

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.

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.

3

CONNECTIONS

Choose one of the following two connecting methods that is more suitable for your audio system.

Choose

1

(pages 4-5) if your amplifier has line output (pin jack) terminal(s)

Choose

2

(pages 6-7) if your amplifier has no line output (pin jack) terminal

Caution: Do not connect the power cord of the subwoofer and other components into an AC outlet until all connections between components are completed.

Note

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.

1

Connecting to line output (pin jack) terminals of the amplifier

• To connect with an amplifier (or AV receiver), connect the SUBWOOFER (or LOW PASS etc.) terminal on the rear of the 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 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 6-7.)

• 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.

4

Using one subwoofer

Subwoofer

INPUT 1

FROM AMPLIFIER

L

/MONO

PHASE

NORM REV

R

VOLTAGE

SELECTOR

220V-240V

110V-120V

POWER

ON

OFF

AUTO

STANDBY

HIGH

LOW

OFF

To AC outlet

Amplifier

CONNECTIONS

Mono pin cable

(not included)

OUTPUT

TO SPEAKERS

INPUT 1

FROM AMPLIFIER

INPUT

2

L

/MONO

R

Audio pin cable

(not included)

Using two subwoofers

OUTPUT

TO SPEAKERS

To AC outlet

INPUT

2

L

/MONO

Subwoofer

INPUT 1

FROM AMPLIFIER

OUTPUT

TO SPEAKERS

L /MONO

PHASE

NORM REV

R

VOLTAGE

SELECTOR

220V-240V

110V-120V

POWER

ON

OFF

AUTO

STANDBY

HIGH

LOW

OFF

R

Subwoofer

OUTPUT

TO SPEAKERS

L /MONO

PHASE

NORM REV

R

VOLTAGE

SELECTOR

220V-240V

110V-120V

POWER

ON

OFF

AUTO

STANDBY

HIGH

LOW

OFF

To AC outlet

OUTPUT

TO SPEAKERS

Mono pin cable(not included)

INPUT

2

L

/MONO

R

INPUT 1

FROM AMPLIFIER

Mono pin cable

(not included)

Amplifier

5

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 front speaker output terminals and both terminals can output sound signals simultaneously.

• Connect one set of front speaker output terminals of the amplifier to the INPUT1 terminals of the subwoofer, and connect the other set of front speaker output terminals of the amplifier to the front speakers.

• Set the amplifier so that both sets of front speaker output terminals output sound signals simultaneously.

Note

If your amplifier has only one set of front speaker output terminals, see page 7.

Using one subwoofer (with speaker cables)

Right front speaker

Subwoofer

Left front speaker

OUTPUT

TO SPEAKERS

INPUT

2

PHASE

L /MONO

NORM REV

R

VOLTAGE

SELECTOR

220V-240V

110V-120V

POWER

ON

OFF

AUTO

STANDBY

HIGH

LOW

OFF

OUTPUT

TO SPEAKERS

INPUT

2

L

/MONO

R

INPUT 1

FROM AMPLIFIER

To AC outlet

Amplifier

Speaker output terminals

Using two subwoofers (with speaker cables)

Right front speaker

Speaker output terminals

Amplifier

Left front speaker

Subwoofer

L /MONO

PHASE

NORM REV

R

220V-240V

110V-120V

VOLTAGE

SELECTOR

POWER

ON

OFF

AUTO

STANDBY

HIGH

LOW

OFF

To AC outlet

OUTPUT

TO SPEAKERS

INPUT 1

FROM AMPLIFIER

R

INPUT

2

L

/MONO

OUTPUT

TO SPEAKERS

INPUT 1

FROM AMPLIFIER

R

INPUT

2

L

/MONO

Subwoofer

L /MONO

PHASE

NORM REV

R

VOLTAGE

SELECTOR

220V-240V

110V-120V

POWER

ON

OFF

AUTO

STANDBY

HIGH

LOW

OFF

To AC outlet

6

CONNECTIONS

If your amplifier has only one set of front 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 front speakers.

Using one subwoofer (with speaker cables)

Right front speaker

Left front speaker

Subwoofer

INPUT 1

FROM AMPLIFIER

L /MONO

PHASE

NORM REV

R

VOLTAGE

SELECTOR

220V-240V

110V-120V

POWER

ON

OFF

AUTO

STANDBY

HIGH

LOW

OFF

OUTPUT

TO SPEAKERS

INPUT 1

FROM AMPLIFIER

R

INPUT

2

L

/MONO

Amplifier

To AC outlet

Speaker output terminals

Using two subwoofers (with speaker cables)

Right front speaker Left front speaker

Subwoofer

INPUT 1

FROM AMPLIFIER

L

/MONO

PHASE

NORM REV

R

VOLTAGE

SELECTOR

220V-240V

110V-120V

POWER

ON

OFF

AUTO

STANDBY

HIGH

LOW

OFF

OUTPUT

TO SPEAKERS

INPUT 1

FROM AMPLIFIER

R

INPUT

2

L

/MONO

To AC outlet Speaker output terminals

OUTPUT

TO SPEAKERS

INPUT

2

L

/MONO

INPUT 1

FROM AMPLIFIER

R

Amplifier

Subwoofer

INPUT 1

FROM AMPLIFIER

L

/MONO

PHASE

NORM REV

R

VOLTAGE

SELECTOR

220V-240V

110V-120V

POWER

ON

OFF

AUTO

STANDBY

HIGH

LOW

OFF

To AC outlet

7

CONNECTIONS

Connecting to the INPUT1/OUTPUT terminals of the subwoofer

Before connecting

Remove the insulation coating at the extremity of each speaker cable by twisting the coating off.

Good

10mm

(3/8”)

No Good

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.

OUTPUT

TO SPEAKERS

PHASE

L /MONO

NORM REV

R

220V-240V

110V-120V

VOLTAGE

SELECTOR

POWER

ON

OFF

AUTO

STANDBY

HIGH

LOW

OFF

2

3

How to connect

1

Press and hold the terminal’s tab, as shown in the figure below.

Insert the bare wires.

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.

+

1

2

Notes

• Do not let the bare speaker wires touch each other, because this could damage the subwoofer or the amplifier, or both of them.

• 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 terminals are observed and set correctly. If these cables are reversed, the sound will be unnatural and lack bass.

To AC outlet

8

CONTROLS AND THEIR FUNCTIONS

Advanced

1

2 3 4

Control panel

5 6

Top

Front panel

AUTO

STANDBY

HIGH

LOW

OFF

8

OUTPUT

TO SPEAKERS

INPUT 1

FROM AMPLIFIER

INPUT

2

PHASE

L /MONO

NORM REV

R

SELECTOR

220V-240V

110V-120V

POWER

ON

OFF

AUTO

STANDBY

HIGH

LOW

OFF

9

OUTPUT

TO SPEAKERS

INPUT 1

FROM AMPLIFIER

0

INPUT

2

PHASE

L

/MONO

R

NORM REV

A B

VOLTAGE

SELECTOR

220V-240V

110V-120V

C

Rear panel

(General model)

POWER

ON

OFF

7

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

AUTO STANDBY

function.

(Refer to page 11 of

“AUTO STANDBY

FUNCTION”

.)

Goes off when the subwoofer is set in the standby mode by pressing the

STANDBY/ON

button.

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.)

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 FILTER

button

ON

: Enables the

HIGH CUT

control setting (

5

).

PASS

: Simplifies the signal path to reduce sound deterioration. (Choose this setting if your amplifier has

LFE or subwoofer output terminals.)

Standby mode

The subwoofer is still using a small amount of power in this mode.

PASS ON

9

CONTROLS AND THEIR FUNCTIONS

5

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.

6

VOLUME

control

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

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.

8

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 AUTO STANDBY function operates as

described on page 11. 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.

9

OUTPUT (TO SPEAKERS)

terminals

Can be used for connecting to the front speakers.

Signals from the

INPUT1

terminals are sent to these terminals.

(Refer to page 7 of

“CONNECTIONS”

for details.)

0

INPUT1 (FROM AMPLIFIER)

terminals

Used to connect the subwoofer with the speaker terminals of the amplifier.

(Refer to pages 6 and 7 of

“CONNECTIONS”

for details.)

A

INPUT2

terminals

Used to input line level signals from the amplifier.

(Refer to pages 4 and 5 of

“CONNECTIONS”

for details.)

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.

C

VOLTAGE SELECTOR

switch

(Asia and General models only)

If the preset setting of the switch is incorrect, set the switch to the proper voltage (110-120/220-240V) of your area.

Consult your dealer if you are unsure of the correct setting.

10

WARNING

Be sure to unplug the subwoofer before setting the

VOLTAGE SELECTOR switch correctly.

Note

When both

@

INPUT1

and

A

INPUT2

terminals of the subwoofer are connected with the amplifier, you may hear a mixed sound due to the effect of the subwoofer receiving the input signals from both the terminals.

If this happens, connect the amplifier only to either the

@

INPUT1

or

A

INPUT2

terminal.

AUTO STANDBY FUNCTION

The subwoofer automatically places itself in the standby mode if it does not receive an input signal for 7 or 8 minutes.

(The power indicator lights in red.) This is called AUTO STANDBY function.

When the subwoofer detects a bass signal input of below 200 Hz, it automatically places itself on. (The power indicator lights in green.)

Activate the AUTO STANDBY function

1

Press the STANDBY/ON button to set the subwoofer in the standby mode. (The power indicator goes off.)

2

Select the following positions of the AUTO STANDBY switch.

- LOW: Normally select this position to activate this function.

- HIGH: If this function does not operate with the AUTO STANDBY switch set to LOW, select this position so that the subwoofer detects input signals with a lower level and switches the power on automatically.

3

Press the STANDBY/ON button again to set the subwoofer on. (The power indicator lights in green.)

Notes

• This function operates only when both the POWER switch and the STANDBY/ON button are set to ON.

• The time period before the subwoofer places itself in the standby mode may vary due to a noise received from other appliances.

• If the subwoofer switches the power on unexpectedly by receiving noises from other appliances, set the AUTO

STANDBY switch to the OFF position to deactivate this function.

11

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 front speakers by following the procedures described below.

7 3

NORM REV

POWER

ON

OFF

3 8 5 1,6

1

2

3

4

5

6

7

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.

Play a source containing low-frequency components and adjust the amplifier’s volume control to the desired listening level.

Adjust the

HIGH CUT

control to the position where the desired response can be obtained and press

HIGH

CUT FILTER

button to the ON position.

Normally, set the control to the level a little higher than the front speaker’s rated minimum reproducible frequency*.

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

Increase the volume gradually to adjust the volume balance between the subwoofer and the front 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.

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.

MUSIC:

When an ordinary music source is played, the excessive low-frequency components are cut off to make the sound clearer.

Notes

• Once the volume balance between the subwoofer and the front 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 front 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 13.

12

ADJUSTING THE SUBWOOFER BEFORE USE

Frequency characteristics

This subwoofer’s frequency characteristics

dB

90

HIGH CUT 90 Hz

HIGH CUT 150 Hz

80

70

60

50

HIGH CUT

50 Hz

40

20 50 100 200 500Hz

Frequency response graph*

The figures below show the optimum adjustment of each control and the frequency characteristics when this subwoofer is combined with a typical front speaker system.

EX.1 When combined with a 4” or 5” (10 cm or 13 cm) acoustic suspension, 2 way system front speakers

If you are using NS-325F speakers as front speakers, use the following example as a reference when adjusting settings.

dB

PHASE

90

NORM REV

80

YST-SW325

70

(90Hz) (REV)

60

Front speaker

50

40

20 50 100 200 500Hz

Frequency response graph*

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

PHASE

90

NORM REV

80

YST-SW325

70

(70Hz) (REV)

60

Front speaker

50

40

20 50 100 200 500Hz

Frequency response graph*

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

13

ADVANCED YAMAHA ACTIVE SERVO TECHNOLOGY II

In 1988, Yamaha brought to the marketplace speaker systems utilizing YST (Yamaha Active Servo Technology) to give powerful, high quality bass reproduction. This technique uses a direct connection between the amplifier and speaker, allowing accurate signal transmission and precise speaker control.

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.

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 reflex method. This allows for bass reproduction from much smaller cabinets than was previously possible.

High-amplitude bass sound

Cabinet

Port

Air woofer

(Helmholtz resonator)

Advanced impedance

Converter

Active

Servo

Processing

Amplifier

Signals

Signals of low amplitude

14

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

Power is not supplied even though the

STANDBY/ON button is set to the ON position.

No sound.

Sound level is too low.

Cause

The power plug is not securely connected.

The POWER switch is set to the OFF position.

The volume is set to minimum.

Speaker cables are not connected securely.

Speaker cables are not connected correctly.

The subwoofer does not turn on automatically.

The subwoofer does not turn into the standby mode automatically.

The subwoofer turns into the standby mode unexpectedly.

The subwoofer turns on unexpectedly.

Setting of the PHASE switch is not proper.

A source sound with few bass frequencies is played.

It is influenced by standing waves.

The POWER switch is set to the OFF position.

The STANDBY/ON button is set to the

STANDBY position.

The AUTO STANDBY switch is set to the OFF position.

The level of input signal is too low.

There is an influence of noise generated from external appliances etc.

The AUTO STANDBY switch is set to the OFF position.

The level of input signal is too low.

There is an influence of noise generated from external appliances etc.

What to Do

Connect it securely.

Set the POWER switch to the ON position.

Raise the volume up.

Connect them securely.

Connect them correctly, that is L (left) to

L, R (right) to R, “+” to “+” and

“–” to “–”.

Set the PHASE 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 POWER switch to the ON position.

Set the STANDBY/ON button to the ON position.

Set the AUTO STANDBY switch to the

“HIGH” or “LOW” position.

Set the AUTO STANDBY switch to the

“HIGH” position.

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.

Set the AUTO STANDBY switch to the

“HIGH” or “LOW” position.

Increase the volume of the amplifier and set the AUTO STANDBY switch to the

“HIGH” position.

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.

15

SPECIFICATIONS

Type

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

Power Consumption

................................................70 W

Driver

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

Magnetic shielding type

Standby Power Consumption

...............................0.5 W

Amplifier Output (100 Hz, 5 ohms, 10% THD)

................................................................................ 150 W

Frequency Respons

e ............................... 25 Hz - 180 Hz

Dimensions (W x H x D)

.......................................315 mm x 380 mm x 374 mm

(12-3/8” x 14-15/16” x 14-3/4”)

Weight

............................................ 13 kg (28 lbs. 11 oz.)

Power Supply

USA and Canada models ..................AC 120 V, 60 Hz

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

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

Asia and General models

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

Please note that all specifications are subject to change without notice.

This product mainly uses lead-free solder.

©2005

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, 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 WD18 7GQ, ENGLAND

YAMAHA SCANDINAVIA A.B.

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

YAMAHA MUSIC AUSTRALIA PTY, LTD.

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

All rights reserved.

Printed in Indonesia WF60430

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