NS-SW700
Subwoofer Caisson de grave
OWNERS MANUAL MODE DEMPLOI
IMPORTANT SAFETY INSTRUCTIONS
1 Read these instructions. 2 Keep these instructions. 3 Heed all warnings. 4 Follow all instructions. 5 Do not use this apparatus near water. 6 Clean only with dry cloth. 7 Do not block any ventilation openings. Install in
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.
accordance with the manufacturers 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.
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 Owners Manual in a safe place for future reference.
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.
FCC INFORMATION (for US customers) 1 IMPORTANT NOTICE : DO NOT MODIFY
THIS UNIT! This product, when installed as indicated in the instructions contained in this manual, meets FCC requirements. Modifications not expressly approved by Yamaha may void your authority, granted by the FCC, to use the product.
We Want You Listening For A Lifetime
YAMAHA and the Electronic Industries Associations 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 Associations Consumer Electronics Group recommend you to avoid prolonged exposure from excessive volume levels. Information for Users on Collection and Disposal of Old Equipment This symbol on the products, packaging, and/or accompanying documents means that used electrical and electronic products should not be mixed with general household waste. For proper treatment, recovery and recycling of old products, please take them to applicable collection points, in accordance with your national legislation and the Directives 2002/96/ EC. By disposing of these products correctly, you will help to save valuable resources and prevent any potential negative effects on human health and the environment which could otherwise arise from inappropriate waste handling. For more information about collection and recycling of old products, please contact your local municipality, your waste disposal service or the point of sale where you purchased the items. [For business users in the European Union] If you wish to discard electrical and electronic equipment, please contact your dealer or supplier for further information. [Information on Disposal in other Countries outside the European Union] This symbol is only valid in the European Union. If you wish to discard these items, please contact your local authorities or dealer and ask for the correct method of disposal.

2 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.
3 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.
Thank you for selecting this YAMAHA product.
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 equipment. 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 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 as a result of vibrations and breaks, it may cause bodily injury. A burning candle etc. If the candle falls as a result of vibration, it may cause fire and bodily injury. A vessel containing water If the vessel falls as a result of vibration and water spills, it may cause damage to the speaker, and/or you may get an electric shock. WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. Do not place this unit where foreign material, such as dripping water. It might cause 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 as a result of 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 space around this unit or avoiding excess humidification. Condensation might cause 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 output 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 output, 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 distortion (i.e., unnatural, intermittent rapping or hammering sounds) coming from this unit, reduce the volume level. Extremely loud playing of a movie soundtracks 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 owners responsibility. YAMAHA shall not be liable for any accident caused by improper placement or installation of speakers. Be sure to allow spaces of at least 20 cm above, behind and on both sides of the unit.

iii En

VOLTAGE SELECTOR (Asia and General models only) The voltage selector switch on the rear panel of this unit must be set to your local main voltage BEFORE plugging this unit into the AC main supply. Voltages are 110/120/220/230-240 V AC, 50/60 Hz. This unit is not disconnected from the AC power source as long as it is connected to the wall outlet, even if this unit itself is turned off by STANDBY/ON button. In this state, this unit is designed to consume a very small quantity of power.

CONTENTS

FEATURES... 2 SUPPLIED ACCESSORIES.. 2 ATTACHING THE NON-SKID PADS.. 2 PLACEMENT... 3 CONTROLS AND THEIR FUNCTIONS.. 4 CONNECTIONS... Connecting to line output (pin jack) terminals of the amplifier..Connecting to speaker output terminals of the amplifier... 8 Connecting to the INPUT1/OUTPUT terminals of the subwoofer..10 Plug in the subwoofer to the AC outlet..10 AUTOMATIC POWER-SWITCHING FUNCTION. 11 Changing the AUTO STANDBY setting..11 ADJUSTING THE SUBWOOFER BEFORE USE. 12 Frequency characteristics..13 ADVANCED YAMAHA ACTIVE SERVO TECHNOLOGY II... 14 TROUBLESHOOTING... 15
This unit features a magnetically shielded design, however, 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. Make sure that neither wire is connected to the earth terminal of a three pin plug. 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. English SPECIFICATIONS.. 16

FEATURES

This subwoofer system employs Advanced Yamaha Active Servo Technology II, which Yamaha has developed for the production of higher quality, superbass 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 effective use of the subwoofer, the subwoofers 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 Automatic power-switching function saves you the trouble of pressing the STANDBY/ON button to turn the power on and off. You can select a 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

ATTACHING THE NONSKID PADS
To enjoy the high sound quality, stabilize the subwoofer using the non-skid pads. Attach the provided non-skid pads in the four corners of the underside of the subwoofer to prevent the subwoofer from moving as a result of vibration, etc.
QD-Bass Technology QD-Bass (Quatre Dispersion Bass) technology is a Yamaha unique technology to radiate the sound efficiently in four horizontal directions.

PLACEMENT

One subwoofer will have a good effect on your audio system, however, the use of two subwoofers 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 front speaker. (See fig. A.) If using two subwoofers, it is recommended to 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 suffer due to cancellation of direct and reflected sounds. To prevent this from happening, place the subwoofer system at an angle, as in fig. A or B.
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 developed between two parallel walls and cancel the bass sounds. In such a case, place the subwoofer at an oblique angle to the wall. It also may be necessary to break up the parallel surfaces by placing bookshelves, etc. along the walls.

: subwoofer,

: front speaker)

English

CONTROLS AND THEIR FUNCTIONS

Front panel

Top panel
Rear panel (General model)
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.
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 the automatic powerswitching function. Goes off when the subwoofer is set in the standby mode. VOLUME control Adjusts the volume level. Turn the control clockwise to increase the volume, and counterclockwise to decrease the volume. VOLTAGE SELECTOR switch (Asia and General models only) If the preset setting of the switch is incorrect, set the switch to the proper voltage (110/120/220/230-240V) of your area. Consult your dealer if you are unsure of the correct setting.
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. 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.) Standby mode The subwoofer is still using a small amount of power in this mode.

WARNING

Be sure to unplug the subwoofer before setting the VOLTAGE SELECTOR switch correctly.
POWER switch 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 subwoofers power supply from the AC outlet. OUTPUT (TO SPEAKERS) terminals Can be used for connecting to the main speakers. Signals from the INPUT1 terminals are sent to these terminals. (Refer to CONNECTIONS for details.) INPUT1 (FROM AMPLIFIER) terminals Used to connect the subwoofer with the speaker terminals of the amplifier. (Refer to CONNECTIONS for details.) INPUT2 terminals Used to input line level signals from the amplifier. (Refer to CONNECTIONS for details.) INPUT3 (LFE) terminals The HIGH CUT control has no effect on the signals inputted to these terminals. (See Page 7 for details) 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 subwoofers automatic power-switching 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. PHASE switch This switch is to be set to the REV (reverse) position. However, depending on your speaker system or listening condition, there may be a case when better sound quality is obtained by setting this switch to the NORM (normal) position. Select the best position by ear.

CONNECTIONS

Choose one of the following two connecting methods most suitable for your audio system.

Choose 1 Choose 2

(pages 6-7) if your amplifier has line output (pin jack) terminal(s) (pages 8-9) if your amplifier has no line output (pin jack) terminal(s)
Caution: Unplug the subwoofer and other audio/video components before making connections.
Notes All connections must be correct, that is to say L (left) to L, R (right) to R, + to + and to. Also, refer to the owners manual of your component to be connected to the subwoofer. After all connections are completed, plug in the subwoofer and other audio/video components. 1
Connecting to line output (pin jack) terminals of the amplifier
To connect to 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 8-9.) 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.

Using

one subwoofer
Subwoofer Mono pin cable (not included)
Audio pin cable (not included) To AC outlet

Amplifier

two subwoofers
Mono pin cable (not included)

Subwoofer

To AC outlet

Connecting

to the LFE (INPUT3) terminal(s)
If your amplifier can cut off high frequencies from the signals for sending to the subwoofer, connect the amplifier to the subwoofer's LFE (INPUT3) terminal(s).This will bring you higher sound quality because the signal routing in the subwoofer is shortened by passing the built-in HIGH CUT circuit.

Connecting to speaker output terminals of the amplifier
Select this method if your amplifier has no line output (pin jack) terminal(s).
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 9.
one subwoofer (with speaker cables)
Subwoofer Left front speaker

Right front speaker

To AC outlet Amplifier Speaker output terminals
two subwoofers (with speaker cables)
Speaker output terminals Left front speaker Amplifier
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.

Left front speaker

Speaker output terminals
Connecting to the INPUT1/OUTPUT terminals of the subwoofer
For connection, keep the speaker cables as short as possible. Do not bundle or roll the excess cabling. If the connections are faulty, no sound will be heard from the subwoofer or the speakers, or both. Make sure that the + and polarity markings of the speaker cables are observed and connected correctly. If these cables are reversed, the sound will be unnatural and lack bass. Caution
Do not let the bare speaker wires touch each other, because this could damage the subwoofer or the amplifier, or both of them.
U.S.A., Canada and Australia models only Banana Plug connections are also possible.
Tighten the terminal knob. Simply insert the banana plug into the terminal

Before

connecting
Plug in the subwoofer to the AC outlet
After all connections are completed, plug the subwoofer and other audio/video components into AC outlets.
Remove 10 mm (3/8) of insulation from the ends of the speaker cables.

10 mm (3/8 )

No Good

to connect

Loosen the terminals knob, as shown in the figure. Insert the bare wire. Tighten the knob. Test the firmness of the connection by pulling lightly on the cable at the terminal.

Red: positive (+) Black: negative () To AC outlet
AUTOMATIC POWER-SWITCHING FUNCTION
This function automatically switches the unit between standby and power-on mode. The subwoofer automatically places itself in standby mode if it does not receive an input signal for 7 or 8 minutes. (The power indicator lights red.) When the subwoofer detects a bass signal input of below 200 Hz, it automatically places itself in power-on mode. (The power indicator lights green.) Notes This function is available only when the POWER switch and STANDBY/ON button are set to ON. Noise received from other appliances may extend the time period before the subwoofer places itself in standby mode to more than 8 minutes.
Changing the AUTO STANDBY setting 1 2
Set the subwoofer to standby. Change the AUTO STANDBY setting. - LOW: Select this position to activate this function. - HIGH: If this function does not operate with 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. - OFF: Select this position to deactivate this function, for example, when the subwoofer switches the power on unexpectedly by sensing noises from other appliances.
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 procedure described below.
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 amplifiers volume control to the desired listening level. Adjust the HIGH CUT control to the position where the desired response can be obtained. Normally, set the control to a level a little higher than the front speakers rated minimum reproducible frequency*. * The front speakers rated minimum reproducible frequency can be looked up in the speakers catalog or owners manual. Increase the volume gradually to adjust the volume balance between the subwoofer and the front speakers. Normally, set the control to a 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. Set the switch to the REV (reverse) position. If the desired response cannot be obtained, set the switch to the NORM (normal) position.
Select MOVIE or MUSIC according to the played source. MOVIE: When a movie type source is played, the lowfrequency effects are enhanced to allow listeners to enjoy more powerful sound. (The sound will be richer and deeper.) MUSIC: When an ordinary music source is played, the excessive low-frequency components are cut off to make the sound clearer. (The sound will be lighter to reproduce the melody line more clearly.)

Notes Once the volume balance between the subwoofer and the front speakers is adjusted, you can adjust the volume of your entire sound system by using the amplifiers 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.
Frequency characteristics
This subwoofers frequency characteristics
HIGH CUT 40 Hz HIGH CUT 90 Hz HIGH CUT 140 Hz
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 10 cm (4) or 13 cm (5) acoustic suspension, 2-way system front speakers

NORM REV

(70Hz) (REV)

Front speaker

200 500Hz
Frequency response graph*
EX.2 When combined with 20 cm (8) or 25 cm (10) acoustic suspension, 2-way system front

speakers

(50Hz)
*This diagram does not depict actual frequency response characteristics.
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. 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. Yamahas 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 amplifiers 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.
Cabinet High-amplitude bass sound Port
Air woofer (Helmholtz resonator)
Advanced impedance Converter
Active Servo Processing Amplifier

Signals

Signals of low amplitude

TROUBLESHOOTING

Refer to the chart below if 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 an authorized YAMAHA dealer or service center.

Problem Power is not supplied even though the STANDBY/ON button is set to the ON position. 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. Sound level is too low. Speaker cables are not connected correctly. The PHASE switch is not set correctly. A source sound with little bass frequency content is being played. 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 parallel surfaces 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. 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.

No sound.

It is influenced by standing waves.
The subwoofer does not turn on automatically.
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.
The subwoofer does not turn into the standby mode automatically.
Noise generated from external appliances etc., is activating the subwoofer.
The AUTO STANDBY switch is set to the OFF position. The subwoofer turns into the standby mode unexpectedly. The subwoofer turns on unexpectedly. The level of input signal is too low. Noise generated from external appliances etc., is activating the subwoofer.

SPECIFICATIONS

Type.. Advanced Yamaha Active Servo Technology Driver..25 cm (10) cone woofer Magnetic shielding type Amplifier Output (100 Hz, 5 ohms, 10% THD)... 300 W Frequency Response. 20 Hz - 160 Hz 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 China model..AC 220V, 50 Hz Korea model..AC 220V, 60 Hz Asia and General models.AC 110/120/220/230-240 V, 50/60 Hz Power Consumption..90 W Standby Power Consumption.0.5 W Dimensions (W H D).. 406mm 445 mm 406 mm (16 17-1/2 16) Weight... 21 kg (46 lbs. 5 oz.) Please note that all specifications are subject to change without notice.

Limited Guarantee for European Economic Area (EEA) and Switzerland
Thank you for having chosen a Yamaha product. In the unlikely event that your Yamaha product needs guarantee service, please contact the dealer from whom it was purchased. If you experience any difficulty, please contact Yamaha representative office in your country. You can find full details on our website (http://www.yamaha-hifi.com/ or http://www.yamaha-uk.com/ for U.K. resident). The product is guaranteed to be free from defects in workmanship or materials for a period of two years from the date of the original purchase. Yamaha undertakes, subject to the conditions listed below, to have the faulty product or any part(s) repaired, or replaced at Yamahas discretion, without any charge for parts or labour. Yamaha reserves the right to replace a product with that of a similar kind and/or value and condition, where a model has been discontinued or is considered uneconomic to repair. Conditions
1. The original invoice or sales receipt (showing date of purchase, product code and dealers name) MUST accompany the defective product, along with a 2. 3. 4.
statement detailing the fault. In the absence of this clear proof of purchase, Yamaha reserves the right to refuse to provide free of charge service and the product may be returned at the customers expense. The product MUST have been purchased from an AUTHORISED Yamaha dealer within the European Economic Area (EEA) or Switzerland. The product must not have been the subject of any modifications or alterations, unless authorised in writing by Yamaha. The following are excluded from this guarantee: a. Periodic maintenance and repair or replacement of parts due to normal wear and tear. b. Damage resulting from: (1) Repairs performed by the customer himself or by an unauthorised third party. (2) Inadequate packaging or mishandling, when the product is in transit from the customer. Please note that it is the customers responsibility to ensure the product is adequately packaged when returning the product for repair. (3) Misuse, including but not limited to (a) failure to use the product for its normal purpose or in accordance with Yamahas instructions on the proper use, maintenance and storage, and (b) installation or use of the product in a manner inconsistent with the technical or safety standards in force in the country where it is used. (4) Accidents, lightning, water, fire, improper ventilation, battery leakage or any cause beyond Yamahas control. (5) Defects of the system into which this product is incorporated and/or incompatibility with third party products. (6) Use of a product imported into the EEA and/or Switzerland, not by Yamaha, where that product does not conform to the technical or safety standards of the country of use and/or to the standard specification of a product sold by Yamaha in the EEA and/or Switzerland. (7) Non AV (Audio Visual) related products. (Products subject to Yamaha AV Guarantee Statement are defined in our website at http://www.yamaha-hifi.com/ or http://www.yamaha-uk.com/ for U.K. resident.) Where the guarantee differs between the country of purchase and the country of use of the product, the guarantee of the country of use shall apply. Yamaha may not be held responsible for any losses or damages, whether direct, consequential or otherwise, save for the repair or replacement of the product. Please backup any custom settings or data, as Yamaha may not be held responsible for any alteration or loss to such settings or data. This guarantee does not affect the consumers statutory rights under applicable national laws in force or the consumers rights against the dealer arising from their sales/purchase contract.

2008 Yamaha Corporation All rights reserved.

Printed in Indonesia

WP33620