YSTSW800 - Subwoofer YAMAHA - Free user manual and instructions

USER MANUAL YSTSW800 YAMAHA

UNPACKING After unpacking, check that the following item is contained.

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.

CAUTION: Read this before operating your unit.

Please read the following operating precautions before use. YAMAHA will not be held responsible for any damage and/or injury caused by not following the cautions below.

To assure the finest performance, please read this manual carefully. Keep it in a safe place for future reference.
- Install this unit in a cool, dry, clean place - away from windows, heat sources, sources of excessive vibration, dust, moisture and cold. Avoid sources of humming (transformers, motors). To prevent fire or electrical shock, do not expose this unit to rain or water.
- Never open the cabinet. If something drops into the set, contact your dealer.
The voltage to be used must be the same as that specified on the rear panel. Using this unit with a higher voltage than specified is dangerous and may cause a fire and/or electric shock.
- To reduce the risk or fire or electric shock, do not expose this unit to rain or moisture.
- Do not use force on switches, controls or connection wires. When moving the unit, first disconnect the power plug and the wires connected to other equipments. Never pull the wires themselves.
- When not planning to use this unit for a long period (ie., vacation, etc.), disconnect the AC power plug from the wall outlet.
- To prevent lightning damage, disconnect the AC power plug when there is an electric storm.
- Since this unit has a built-in power amplifier, heat will radiate from the rear panel. Place the unit apart from the walls, allowing enough spaces 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.

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

• 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 small metallic objects on this unit.

Otherwise, the object may fall, possibly causing an injury.

• Do not place the following objects on this unit: Glass, china, etc.

If glass etc. falls by vibrations and breaks, it may cause personal injury.

A burning candle etc.

If the candle falls by vibrations, it may cause fire and personal injury.

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.

• 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 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 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.
  The household breaker might go off unexpectedly when a high level signal is inputted to this unit. In this case, turn down the volume on the amplifier etc. connected to this unit or cut off the power to other unused equipment.

• 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 20Hz - 50Hz sine waves from a test disc, bass sounds from electronic instruments, etc. are continuously outputted, or when the stylus of a turntable touches the surface of a disc, reduce the volume level to prevent this unit from being damaged.
• If you hear distorted noise (i.e., unnatural, intermittent "rapping" or "hammering" sounds) coming from this unit, reduce the volume level. Extremely loud playing of a movie soundtrack's low frequency, bass-heavy sounds or similarly loud popular music passages can damage this speaker system.
  Vibration generated by super-bass frequencies may distort images on a TV. In such a case, move this unit away from the TV set.
• Do not attempt to clean this unit with chemical solvents as this might damage the finish. Use a clean, dry cloth.
• Be sure to read the "TROUBLESHOOTING" section regarding common operating errors before concluding that the unit is faulty.
• Secure placement or installation is the owner's responsibility.

YAMAHA shall not be liable for any accident caused by improper placement or installation of speakers.

Standby mode

When this unit is turned off by pressing the STANDBY/ON button on the front panel, this unit consumes a small amount of power. This state is called the standby mode.

This unit's power supply is completely cut off from the AC line only when the POWER switch on the rear panel is set in the OFF position or the AC power cord is disconnected.

This unit features a magnetically shielded design, but there is still a chance that placing it too close to a TV set might impair picture color. Should this happen, move this unit away from the TV set.

CONTENTS

UNPACKING . Inside of Front Cover

CAUTION 1

FEATURES 2

PLACEMENT 3

CONNECTIONS 4

Connecting to line output (pin jack) terminals of the amplifier 4

Connecting to speaker output terminals of the amplifier 6

CONTROLS AND THEIR FUNCTIONS... 8

AUTOMATIC POWER-SWITCHING FUNCTION 9

ADJUSTING THE SUBWOOFER BEFORE USE 10

Frequency characteristics. 11

ADVANCED YAMAHAACTIVE SERVOTECHNOLOGY 12

TROUBLESHOOTING 13

SPECIFICATIONS 14

FEATURES

• This subwoofer system employs Advanced YAMAHA Active Servo Technology which YAMAHA has developed for reproducing higher quality super-bass sound. (Refer to page 12 for details on Advanced YAMAHA Active Servo Technology.) This super-bass sound adds a more realistic, theater-in-the-home effect to your stereo system.

• This subwoofer can be easily added to your existing audio system by connecting to either the speaker terminals or the line output (pin jack) terminals of the amplifier.

• For the effective use of this unit, this unit's superbass sound should be matched to the sounds of your main speakers. You can create the best sound quality for various listening conditions by using the HIGH CUT control and the PHASE switch.

• The Automatic power-switching function saves you the trouble of pressing the STANDBY/ON button to turn the power on and off.
• You can select bass effect suitable for the source by using the BASS switch.

A

B

C

subwoofer, : main speaker)

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

If using one subwoofer, it is recommended to place it on the outside of either the right or the left main speaker. (See fig. A.) If using two subwoofoers, it is recommended to place them on the outside of each main speaker. (See fig. B.) The placement shown in fig. C is also possible, however, if the subwoofer system is placed directly facing the wall, the bass effect may die because the sound from it and the sound reflected by the wall may cancel out each other. To prevent this from happening, face the subwoofer system at an angle as in fig. A or B.

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 nonskid pads

Put the provided nonskid pads at the four corners on the bottom of the subwoofer to prevent the subwoofer from moving by vibrations etc.

CONNECTIONS

Caution: Plug in the subwoofer and other audio/video components after all connections are completed.

• 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 for each of your components.
• The subwoofer can be connected to either the line output (pin jack) terminals or the speaker output terminals of the amplifier. Choose one of the ways shown in this section that is more suitable for your audio system. Also, refer to the owner's manual of your component to be connected to the subwoofer.

Basically, connect the subwoofer to the line output (pin jack) terminal(s) of the amplifier. (Refer to pages 4 and 5 for details.) If your amplifier does not have any line output terminal, connect the subwoofer to the speaker output terminals of the amplifier. (Refer to pages 6 and 7 for details.)

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

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

• To connect with a YAMAHA DSP amplifier (or AV receiver), connect the SUBWOOFER (or LOW PASS etc.) terminal on the rear of the DSP amplifier (or AV receiver) to the C/MONO INPUT2 terminal of the subwoofer.

• When connecting the subwoofer to the SPLIT SUBWOOFER terminals on the rear of the DSP amplifier, be sure to connect the L/MONO INPUT2 terminal to the "L" side and the R INPUT2 terminal to the "R" side of the SPLIT SUBWOOFER terminals.

Using one subwoofer

Using two subwoofoers

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 and 7.)

• When connecting to a monaural line output terminal of the amplifier, connect the / O N O 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.

Connecting to speaker output terminals of the amplifier

Using one subwoofer

If your amplifier has only one set of main speaker output terminals

Connect the speaker output terminals of the amplifier to the INPUT1 terminals of the subwoofer, and connect the OUTPUT terminals of the subwoofer to the main speakers.

If your amplifier has two sets of speaker output terminals

Using two subwoofoers

Connect the speaker output terminals of the amplifier to the INPUT1 terminals of the subwoofer, and connect the OUTPUT terminals of the subwoofer to the main speakers.

Connecting to the INPUT1/OUTPUT terminals of the subwoofer

For connections, keep the speaker cords as short as possible. Do not bundle or roll up the excess part of the cords. 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 cords are observed and set correctly. If these cords are reversed, the sound will be unnatural and lack bass.

How to Connect:

Red: positive (+) Black: negative (-)

① Loosen the knob. ② Insert the bare wire. [Remove approx. 10 mm (3 / 8^ ) insulation from the speaker wires.]
③ Tighten the knob and secure the wire.

Caution

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

Banana Plug connections are also possible.

① Tighten the terminal knob.
② Simply insert the Banana Plug connector into the terminal.

CONTROLS AND THEIR FUNCTIONS

Front panel

Power indicator
Lights up while the subwoofer is turned on.
STANDBY/ON button

Press this button to turn on the power. Press again to set the subwoofer in the standby mode.

• This button can be used only when the POWER (5) switch is set in the ON position.

Standby mode

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

3 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.

4 VOLUME control

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

5 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 (2) button. Set this switch to the OFF position to completely cut off the subwoofer's power supply from the AC line.

BASS switch

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

7 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.

AUTO STANDBY (HIGH/LOW/OFF) switch

This switch is originally set to the OFF position. By setting this switch to the HIGH or LOW position, the subwoofer's automatic power-switching function operates as described below. 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 STANDBY/ON (2) button is in the OFF position.

9 INPUT2 terminals

Used to input line level signals from the amplifier. (Refer to "CONNECTIONS" for details.)

10 OUTPUT (TO SPEAKERS) terminals

Can be used for connecting to the main speakers.

Signals are sent directly from the amplifier to the main speakers by way of these terminals.

(Refer to "CONNECTIONS" for details.)

1 INPUT1 (FROM AMPLIFIER) terminals

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

(Refer to "CONNECTIONS" for details.)

AUTOMATIC POWER-SWITCHING FUNCTION

When you play a source, the power of the subwoofer turns on automatically by sensing audio signals input to the subwoofer. On the other hand, the subwoofer automatically switches to the standby mode if the source being played is stopped or the input signal is cut off for a few minutes.

This function operates 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. Set this switch to the position you prefer. In the HIGH position, the power will turn on even with a low level of input signal. But please be aware that the subwoofer may not switch to the standby mode when there is an extremely low input signal.

• The power might turn on unexpectedly by sensing noise from other appliances. If that occurs, set the AUTO STANDBY switch to the OFF or LOW position.
• The level of low frequency input signal differs with each source and among different parts within the same source. This means that the function may not operate properly on some sources.
• The level of low frequency input signal this function senses is about 100 Hz .

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

ADJUSTING THE SUBWOOFER BEFORE USE

Before using the subwoofer, adjust the subwoofer to obtain the optimum volume and tone balance between the subwoofer and the main speakers by following the procedures described below.

Front panel

Rear panel

1 Set the VOLUME control to minimum (0).
2 Turn on the power of all the other components.
3 Press the STANDBY/ON button to turn on the subwoofer.
4 Play a source and adjust the amplifier's volume control to the desired listening level.
5 Adjust the HIGH CUT control to the position where the desired response can be obtained.

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

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

6 Increase the volume gradually to adjust the volume balance between the subwoofer and the main speakers.

Normally, set the control to the level where you can obtain a little more bass effect than when this unit is not used. If the desired response cannot be obtained, adjust the HIGH CUT control and the VOLUME control again.

7 Set the PHASE switch to the position which gives you the better bass sound.

Normally, set the switch to the REV (reverse) position. If the desired response cannot be obtained, set the switch to the NORM (normal) position.

• Once the volume balance between the subwoofer and the main speakers is adjusted, you can adjust the volume of your whole sound system by using the amplifier's volume control. However, if you change the main speakers to others, you must make this adjustment again.
• For adjusting the VOLUME control, the HIGH CUT control and the PHASE switch, refer to "Frequency characteristics" on the next page.

Frequency characteristics

This subwoofer's frequency characteristics

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

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

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

The theory of Yamaha Active Servo Technology has been based upon two major factors, the Helmholtz resonator and negative-impedance drive. Active Servo Processing speakers reproduce the bass frequencies through an "air woofer", which is a port or opening in the speaker's cabinet. This opening is used instead of, and performs the functions of, a woofer in a conventionally designed speaker system.

Thus, signals of low amplitude within the cabinet can, according to the Helmholtz resonance theory, be outputted from this opening as waves of great amplitude if the size of the opening and the volume of the cabinet are in the correct proportion to satisfy a certain ratio.

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 new design in which the amplifier supplies special signals. If the electrical resistance of the voice coil could be reduced to zero, the movement of the speaker unit would become linear with respect to signal voltage. To accomplish this, a special negative-impedance output-drive amplifier for subtracting output impedance of the amplifier is used.

By employing negative-impedance drive circuits, the amplifier is able to generate precise, low-amplitude, low-frequency waves with superior damping characteristics.

These waves are then radiated from the cabinet opening as high-amplitude signals. The system can, therefore, by employing the negative-impedance output drive amplifier and a speaker cabinet with the Helmholtz resonator, reproduce an extremely wide range of frequencies with amazing sound quality and less distortion.

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 sound pressure compared with the conventional Yamaha Active Servo Technology, resulting in more natural and dynamic bass reproduction.

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

Problem	Cause	What to Do
Power is not supplied even though the STANDBY/ON button is set to the ON position.	The power cord is not plugged in, or the POWER switch is set to the OFF position.	Plug the power cord into an AC outlet and/or set the POWER switch to the ON position.
No sound.	The VOLUME control is set to 0.	Turn the VOLUME control to the right.
	Speaker cords are not connected securely.	Connect them securely.
Sound level is too low.	Speaker cords are not connected correctly.	Connect them correctly, that is L (left) to L, R (right) to R, "+" to "+" and "-" to "-"
	Setting of the PHASE switch is not proper.	Set the switch to the other position.
	A source sound with few bass frequencies is played.	Play a source sound with bass frequencies. Set the HIGH CUT control to a higher position.
	It is influenced by standing waves.	Reposition the subwoofer or break up the parallel surface by placing bookshelves etc. along the walls.
The subwoofer does not turn on automatically.	The POWER switch is set to the OFF position.	Set the POWER switch to the ON position.
	The STANDBY/ON button is set to OFF.	Set the STANDBY/ON button to ON.
	The AUTO STANDBY switch is set to the OFF position.	Set the AUTO STANDBY switch to the "HIGH" or "LOW" position.
	The level of input signal is too low.	Set the AUTO STANDBY switch to the "HIGH" position.
The subwoofer turns into the standby mode unexpectedly.	The level of input signal is too low.	Set the AUTO STANDBY switch to the "HIGH" position.
The subwoofer turns on unexpectedly.	There is an influence of noise generated from external appliances etc.	Move the subwoofer farther away from such appliances and/or reposition the connected speaker cables. Otherwise, set the AUTO STANDBY switch to the "OFF" position.
The household breaker goes off.	This unit consumes much electricity when a high level signal is inputted to this unit.	Turn down the volume on the amplifier etc. connected to this unit or cut off the power to other unused equipment.

Type Advanced Yamaha Active Servo Technology

Driver. 25 cm (10") cone woofer (JA25610)

Magnetically shielded type

Amplifier Output 800W/6Ω

Frequency Response. 18 Hz-160 Hz (-10 dB)

Power Supply

USA and Canada models AC 120V,60 Hz

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

Australia model AC 240V,50 Hz

Power Consumption 250W

Dimensions (W x H x D).... 390 mm x 482 mm x 420 mm

(15-3/8"×19"×16-9/16")

Weight 24 kg (52 lbs. 13 oz.)

Accessories Nonskid pad x 4

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

Type Advanced Yamaha Active Servo Technology

JUSTERING AV
SUBWOOFERHÖGTALAREN INNAN
DEN ANVÄNDS 10

Frekvenskaraktäristika. 11

ADVANCED YAMAHAACTIVE SERVOTECHNOLOGY 12

FELSÖKNING 13

TEKNISKA DATA. 14

EGENSKAPER

JUSTERING AV SUBWOOFERHÖGTALAREN INNAN DEN ANVÄNDS

Type Advanced Yamaha Active Servo Technology

Driver. 25 cm konus-woofer (JA25610)