NS-P430 NEW PRODUCT BULLETIN
Digital Home Cinema 5.1-Channel Speaker System

NS-P430

Complete Speaker Package for 5.1-Channel Movie Sound, Including Main, Rear, Centre Speakers and Subwoofer. Incorporates Yamahas Top-Line Speaker Technology for Clean, Accurate Reproduction and Powerful Bass.
Enjoy Rich, Clear Surround Sound from Compact, Smartly Designed Speakers.

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Experience the Thrill of Powerful, Realistic 5.1-Channel Movie Sound in Your Own Home.
Excellent sound quality and smart, compact design. Ideal speaker combination for 5.1channel movie sound formats Two-way acoustic suspension design featuring coaxial and full-range drivers (main/rear) and coaxial plus dual fullrange drivers (centre). QD-Bass technology and Advanced YST for deep, powerful bass. Magnetic shielding allows placement near a TV.
Convenience and Quality for 5.1-Channel Movie Sound Choose the NS-P430 speaker package and you get the convenience of an all-in-one system with high quality speakers. Not only are these speakers perfectly matched for acoustics and design, but they take advantage of unique technologies that Yamaha originally developed for its high-end speakers. With an amplifier or receiver and a DVD player, youll enjoy movies with sensational surround sound. Whats more, even with their extremely high quality, these speakers are small enough for easy positioning in rooms of any size. Advanced Design for High Sound Quality The main and rear speakers have a two-way acoustic suspension design with one coaxial two-way driver (5cm cone and 1.3cm dome) plus one full-range driver (5cm cone). The centre speaker has the same coaxial two-way driver, and also includes dual 5cm cone full-range drivers. All five of these speakers are rated at 100W maximum input, more than enough for dynamic movie sound.
Digital Home Cinema 5.1-Channel Speaker Package
The NS-430 is also offered with a cherry, black and silver finish in some areas.

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Powerful Bass Response The subwoofer uses two of Yamahas unique power-bass technologies: QD-Bass and Advanced YST. They combine power and detailed, accurate reproduction in a compact unit. Good bass is more than just pounding its important for the full sonic enjoyment of games, music and especially movies. QD-Bass Technology QD-Bass (Quatre Dispersion Bass) technology uses down-firing drivers with square, pyramidshaped reflective plates to radiate the sound efficiently in four horizontal directions. The reflective plates (not used in competitors down-firing subwoofers) negate any effects caused by the floor surface and reduce resonance between sound waves reflected from the floor and the unit. Also, most other systems use circular cones, but by radiating in four directions to avoid the legs of the cabinet, QD-Bass reduces turbulence caused by reflection from the legs. Changing the height of the square pyramid varies the acoustic load, permitting
relatively simple high-cut adjustment and improved bandpass properties. The QD-Bass system provides extraordinary power and smooth frequency response from an extremely compact unit. It also allows greater freedom of placement, since the sound radiates with equal effectiveness in all directions. Advanced YST Yamahas patented Advanced Active Servo Technology (Advanced YST) generates incredible bass from small speaker enclosures. Advanced YST is the ideal method of combining amplifiers and speakers for maximum performance. This systems advanced negative impedance converters intelligently adjust the negative impedance generation as the speaker moves, creating a hard, rigid cone that prevents deep resonant waves from leaking out of the speaker cone. This means the full power of the waves is forced out through the air port, resulting in clear, powerful bass. BASS Function The BASS (Bass Action Selection System) function lets you switch between Movie and Music modes, providing the optimum frequency response in each case.
Advanced Technology Brings You Super Bass.
ADVANCED YAMAHA ACTIVE SERVO TECHNOLOGY The effectiveness of Yamaha Active Servo Technology is based upon two principles: 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 cabinet. This port is used instead of, and performs the functions of, a conventional woofer. Low amplitude signals inside the cabinet can, due to the Helmholtz Resonance principle, be output from this port as high amplitude waves if the design is such that the size of the port and the volume of the cabinet are in a certain proportion. In addition, the wave amplitudes inside the cabinet must be precise and of sufficient power, in order to overcome the load presented by the air within the cabinet. This is accomplished by employing an amplifier that is capable of supplying 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 achieve this, a special negative-impedance output drive amplifier is used, so the impedances cancel out and become zero. 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. This amplifier/speaker combination is capable of reproducing an extremely wide range of frequencies with excellent sound quality and low distortion. The new Advanced Yamaha Active Servo Technology takes this concept a stop further by adopting Advanced Negative Impedance Converter (ANIC) circuits. These circuits allow the converter to dynamically vary in order to select the optimum values for speaker impedance variation. With these new circuits, Advanced Yamaha Active Servo Technology provides more stable performance and higher sound pressure levels than the former system, resulting in more natural and energetic bass reproduction.

Air Woofer (Helmholtz Resonator) Cabinet Port Advanced NegativeImpedance Converter
High-Amplitude Bass Sound
Active Servo Processing Amplifier

Signals

Signals of Low Amplitude

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Designed for Use in 5.1-Channel Home Cinema Systems
This speaker package is designed for use in a 5.1-channel (6speaker) system. This configuration allows Dolby Digital and DTS movie sound formats to be enjoyed at their full potential. The speakers high performance capabilities ensure accurate reproduction of DVD and other high quality sound sources, as well as of Yamahas dynamic and realistic CINEMA DSP sound.
Enjoy Home Cinema Surround Sound at Its Best with an All-Yamaha System.
The ideal way to take full advantage of the NS-P430 speakers capabilities is to use them together with a Yamaha Home Cinema Amplifier or Receiver and DVD Player. These components give you the unique sonic benefits of CINEMA DSP and a wide range of music and movie surround programmes, plus the full 5.1channel Dolby Digital or DTS Digital Surround movie sound experience. With an all-Yamaha system, you get top quality sound, easy connections, and stylish components that look good in any setting.

5.1-Channel System

5.1-Channel Compatible Amplifier/Receiver DVD Player NS-P430
5.1-Channel Speaker Package
The NS-P430 5.1-channel Speaker Package consists of four satellite speakers (main L/R and rear L/R), a centre speaker and a subwoofer.
NS-P430 Main Specifications
System Frequency Response Magnetic Shielding 3060,000 Hz All speakers Centre Speaker Design Drivers 2-way acoustic suspension coaxial two-way driver (5cm [2] cone and 1.3cm [1/2] dome) plus dual 5cm [2] full-range driver Input Power (Maximum/Nominal) 100 W/30 W Sensitivity 86 dB/2.83 V/1m Impedance 6 ohms Dimensions (W x H x D) 273 x 81 x 147 mm; 10-3/4 x 3-3/16 x 5-13/16 Weight 1.7 kg; 3.8 lbs. Subwoofer Design Output Power Driver Dimensions (W x H x D) Weight
Satellite Speakers (2 Main and 2 Rear) Design 2-way acoustic suspension Drivers coaxial two-way driver (5cm [2] cone and 1.3cm [1/2] dome) plus 5cm [2] full-range driver Input Power (Maximum/Nominal) 100 W/30 W Sensitivity 85 dB/2.83 V/1m Impedance 6 ohms Dimensions (W x H x D) 87 x 184 x 147 mm; 3-7/16 x 7-1/4 x 5-13/16 Weight 1.2 kg; 2.7 lbs.
Advanced Yamaha Active Servo Technology (Advanced YST) 70 W (5 ohms, 100Hz, 10% THD) 16cm (6-1/2) multi-range 280 x 325 x 320 mm; 11 x 12-13/16 x 12-5/8 9.2 kg; 20.3 lbs.
Dolby Digital, EX and Double D are trademarks of Dolby Laboratories Corporation. DTS, ES and DTS Digital Surround are trademarks of Digital Theater Systems, Inc. Screen images are simulated. Product designs and specifications are subject to change without notice.

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 this unit rises, it may cause fire, damage to this unit and/or personal injury. Do not plug in this unit to a wall outlet until all connections are completed. 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 fire, damage to this unit, and/or personal injury. YAMAHA will not be held responsible for any damage resulting from use of this unit with a voltage other than specified. To prevent lightning damage, disconnect the AC power plug when there is an electric storm. 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 Hz50 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 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. When disconnecting the power cord from the wall outlet, grasp the plug; do not pull the cord. When not planning to use this unit for a long period (i.e. vacation, etc.), disconnect the AC power plug from the wall outlet. VOLTAGE SELECTOR (For China, Korean and General models) 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. 110V120V 220V240V Voltages are 110-120/220-240 V AC, 50/ VOLTAGE SELECTOR 60 Hz.

For YST-SW015

Standby mode If the POWER switch is set to the ON position and the AUTO STANDBY switch is set to the HIGH or LOW position, this unit turns into the standby mode when no signal is received by this unit for 7 to 8 minutes. In this state, this unit is designed to consume a very small quantity of power.

WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.

NS-P430-436 (UB)

03.2.28, 7:02 PM
COMPONENTS OF THE PACKAGE
The speaker package NS-P430 and NS-P436 is designed for use in a multi-channel audio system such as a home theater system. NS-P430 includes four NX-430P speaker systems, one NXC430 speaker system and one YST-SW015 subwoofer system. NS-P436 includes five NX-430P speaker systems, one NXC430 speaker system and one YST-SW015 subwoofer system.

<YST-SW015>

Active Servo Processing Subwoofer System with a built-in power amplifier This subwoofer system employs Advanced Yamaha Active Servo Technology which YAMAHA has developed for reproducing higher quality super-bass sound. (Refer to page 14 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. The HIGH CUT control enables you to adjust the tone balance between the subwoofer and the main speakers. The Automatic power-switching function saves you the trouble of pressing the STANDBY/ON button to turn the power on or turn it to the STANDBY mode.

<NX-430P>

2-way acoustic-suspension speaker system used for the main and rear speakers (and rear center speaker for NS-P436)

<NX-C430>

2-way acoustic-suspension speaker system used for the center speaker

QD-Bass Technology

QD-Bass (Quatre Dispersion Bass) technology uses square, pyramid-shaped reflective plates to radiate the sound in four horizontal directions.

CONTENTS

IMPORTANT SAFETY INSTRUCTIONS. II UNPACKING.. IV CAUTION.. 1 COMPONENTS OF THE PACKAGE. 2 SETTING UP THE SPEAKERS.. 3 Placing the subwoofer.. 4 Placing the center speaker.. 4
Mounting the main/rear/center speakers (and rear center speaker for NS-P436) on a wall.. 5 Mounting the main/rear speakers (and rear center speaker for NS-P436) by using commercially available speaker stands or brackets.. 6
CONNECTIONS... 7 An example of basic connections.. 7
How to connect speaker cables to the input and output terminals of the speakers.. 9

USING THE SUBWOOFER (YST-SW015). 10 Controls and their functions. 10 Automatic power-switching functon.. 11 Adjusting the subwoofer before use. 12 Frequency characteristics.. 13 ADVANCED YAMAHA ACTIVE SERVO TECHNOLOGY (for YST-SW015). 14 TROUBLESHOOTING.. 15 SPECIFICATIONS. Back Cover

I About this manual

This manual is printed prior to production. Design and specifications are subject to change in part for the reason of the improvement in operativity ability, and others. In this case, the product has priority. Some of the illustrations and names of the package contents etc. written in this manual may differ from the actual products and the names written on the package etc.

SETTING UP THE SPEAKERS

Before making connections, place all speakers in their respective positions. The positioning of the speakers is important because it controls the whole sound quality of this system. Place the speakers depending on your listening position by following the instructions below.

Speaker configuration

<NS-P430>
This speaker package employs a 6 speaker configuration: 2 main speakers, 2 rear speakers, a center speaker and a subwoofer. The main speakers emit main source sound. The rear speakers emit surround sounds, and the center speaker emits center sounds (dialog etc.). The subwoofer emits reinforcing low frequencies on your audio system.

Placing speakers

Main speakers: Rear speakers: On both sides of and at approximately the same height as the TV set. Behind your listening position, facing slightly inward. About 1.8 m (approx. 6 feet) from the floor. Precisely between the main speakers.

Center speaker:

Rear center speaker (for NS-P436): Precisely between the rear speakers. Subwoofer: The position of the subwoofer is not so critical because low bass tones are not highly directional. Refer to Placing the subwoofer on page 4 for a recommended positioning of the subwoofer.

<NS-P436>

This speaker package employs a 7 speaker configuration: 2 main speakers, 2 rear speakers, a center speaker, a rear center speaker and a subwoofer. The main speakers emit main source sound. The rear and rear center speakers emit surround sounds, and the center speaker emits center sounds (dialog etc.). The subwoofer emits reinforcing low frequencies on your audio system. Note In this speaker package, the same speakers (NX-430P) are used for the main and rear speakers (and rear center speaker for NS-P436).
Main R Center Main L TV-set Subwoofer

Main L

Center

Main R Subwoofer

Rear R
Rear center (for NS-P436) Rear L

Rear L

Rear center (for NS-P436)
These speakers feature a magnetically shielded design, but there is still a chance that placing them too close to a TV set might impair picture color. Should this happen, move the speakers away from the TV set.

Placing the subwoofer

It is recommended to place the subwoofer on the outside of either the right or the left main speaker. (See fig. .) The placement shown in fig. 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 shown in fig. Note There may be a case that you cannot obtain enough superbass 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.

: Subwoofer,

: Main speaker)
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.
Placing the center speaker
You can place the speaker on top of the TV if the top is flat, on the floor under the TV, or inside the TV rack. Be sure to place the speaker in a stable position. When placing the speaker on top of the TV, to prevent the speaker from falling, attach the provided fasteners at two points on the bottom of the speaker and on the top of the TV. Notes Do not place the speaker on top of a TV whose area is smaller than the bottom of the speaker. If placed, the speaker may fall and cause injury. Do not place the speaker on top of a TV if the top is inclined. Do not touch the adhesive surface after peeling off the seal as this will weaken its adhesive strength. Thoroughly wipe clean the surface where the fastener is to be applied. Note that adhesive strength is weakened if the surface is dirty, oily or wet and that this may cause the center speaker to fall.
Fastener Peel off the seal
Mounting the main/rear/center speakers (and rear center speaker for NS-P436) on the wall
Tapping screw (Available at the hardware store) Diam. 3.5 to 4 mm
You can mount the main, rear and/or center speakers (and/ or rear center speaker for NS-P436) on a wall. To mount the speakers on a wall, use the holes of the brackets attached on the speakers back panels.
Main/rear/rear center (for NS-P436)

Min. 20 mm

4 mm Holes

Wall/ wall support

Fasten two screws into a firm wall or wall support at the interval shown below. Main/rear/rear center (for NS-P436).. 26 mm (1) Center.. 222.8 mm (8-3/4)
Hang the speaker by mounting the holes on the protruding screws. * Make sure that the screws are securely affixed by the narrow parts of the holes.

222.8 mm

WARNING Each speaker weighs as follows. Main/rear/rear center (for NS-P436).. 1.2 kg (2 lbs. 10 oz.) Center.. 1.7 kg (3 lbs. 12 oz.) Do not mount them on thin plywood or a wall composed of a soft surface material. If mounted, the screws may pull out of the flimsy surface and the speakers may fall. This may damage the speakers or cause personal injury. Do not affix the speakers to a wall using nails, adhesives, or any other unstable hardware. Longterm use and vibrations may cause the speakers to fall. To avoid accidents resulting from tripping over loose speaker cables, fix the cables to the wall. Select an appropriate position on the wall to mount the speaker so that no one will injure his/her head or face.
Mounting the main/rear speakers (and rear center speaker for NS-P436) by using commercially available speaker stands or brackets
You can also use the screw holes on the bottom of the speaker for installing the speakers on commericially available speaker stands (if you do not use the attached mounting brackets.) Using the Yamaha Speaker Stand SPS-10MM (option) By using the Yamaha Speaker Stand SPS-10MM, speakers can be placed on the floor. (Two stands make a set.)
A screw with a diameter of 4 mm can be used. (Hole depth : 10 mm) 60 mm

SPS-10MM

* The SPS-10MM is not available in some areas.

Removing the front cover

The front cover is fastened to the enclosure at four points and can be removed if desired. To remove the cover, hold on to both sides and slowly pull straight away from the speaker. To reattach, line up the four holes on the inner surface of the cover with the four corresponding pegs on the speaker and push gently. Note When the cover is removed, be sure not to touch the speaker units with your hands or to exert excessive force with tools.

CONNECTIONS

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

An example of basic connections
Main speakers Right Left Center speaker

FRONT R

FRONT L

Amplifier

SPEAKERS REAR CENTER L

CENTER

R L R REAR (SURROUND) L

REAR R

REAR C

SUB WOOFER

OUTPUT

REAR L

Subwoofer

AUTO STANDBY

OFF LOW HIGH NORM REV
110V120V 220V240V VOLTAGE SELECTOR

POWER ON

To AC outlet

Rear speaker Right

Rear center speaker (for NS-P436)

Rear speaker Left

Connect the main, center and rear speakers (and rear center speaker for NS-P436) to the speaker output terminals of your amplifier with the provided speaker cables. * The provided speaker cables have labels marked FRONT L, FRONT R, CENTER, REAR L, REAR R (and REAR C for NS-P436). Connect each speaker cable to the corresponding speaker by following the figure on page 7. (The speaker cables marked FRONT L/R are used for connecting the main speakers to the MAIN speakers terminals on the amplifier.) * Connect each speaker making sure not to reverse the polarity (+, ). If the speaker is connected with reversed polarity, the sound will be unnatural and lack bass. * For the main and rear speakers only, connect one speaker to the left (marked L) terminals of your amplifier, and another speaker to the right (marked R) terminals.
Connect the subwoofer to the line output (pin jack) terminal(s) 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 L/MONO INPUT terminal of the subwoofer. * To connect the subwoofer to the SPLIT SUBWOOFER terminals on the rear of the DSP amplifier, connect them to both the left L/MONO and right R INPUT terminals of the subwoofer.
Note When connecting to a monaural line output terminal of the amplifier, connect to the L/MONO INPUT terminal.
How to connect speaker cables to the input terminals of the speakers
For connections, 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 speakers.
Main speakers Center speaker
Use the provided speaker cables (4 m). One side of the speaker cable is red and the other side is black. Connect the (+) terminals on both the speaker and the amplifier using the red side of the cable. Connect the () terminals on both components using the black side. Red: positive (+) Black: negative ()

Before connecting

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

How to Connect: Red

1 Press and hold the terminals tab, as shown in the

figure.

2 Insert the bare wire. 3 Release your finger from the tab to allow it to lock
securely on the cables wire end. Black
4 Test the firmness of the connection by pulling lightly on
the cable at the terminal. Note Do not let the bare speaker wires touch each other as this could damage the speaker or the amplifier, or both of them.
Rear speakers Rear center speaker (for NS-P436)
Use the provided speaker cables (15 m). One side of the speaker cable has a gray line and the other side has no line. Connect the (+) terminals on both the speaker and the amplifier using the side with a gray line. Connect the () terminals on both components using the side with no line.
Red: positive (+) Black: negative ()

Gray line

03.2.28, 7:03 PM
USING THE SUBWOOFER (YST-SW015)
Controls and their functions

Front panel

Rear panel (General model)
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. STANDBY/ON button Press this button to turn on the power when the POWER (7) 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.
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.
100 Hz 90 Hz 80 Hz 70 Hz 60 Hz 50 Hz 110 Hz 120 Hz 130 Hz 140 Hz 150 Hz
VOLUME control Adjusts the volume level. Turn the control clockwise to increase the volume, and counterclockwise to decrease the volume. VOLTAGE SELECTOR switch (For China, Korean and General models) If the preset setting of the switch is incorrect, set the switch to the proper voltage range (220V-240V or 110V-120V) of your area. Consult your dealer if you are unsure of the correct setting. WARNING Be sure to unplug the subwoofer before setting the VOLTAGE SELECTOR switch correctly.

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 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 subwoofers power supply from the AC line. INPUT terminals Used to input line level signals from the amplifier. (Refer to CONNECTIONS 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 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 subwoofer is set in the standby mode by pressing the STANDBY/ON (2) button. PHASE switch Normally this switch is to be set to the REV (reverse) position. However, according to the listening condition or your preference, 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.
Automatic power-switching function
If the source being played is stopped and the input signal is cut off for 7 to 8 minutes, the subwoofer automatically switches to the standby mode. (When the subwoofer switches to the standby mode by the automatic powerswitching function, the power indicator lights up in red.) When you play a source again, the power of the subwoofer turns on automatically by sensing audio signals input to the subwoofer. This function operates by sensing a certain level of low frequency input signal. Usually set the AUTO STANDBY switch to the LOW position. However, if this function does not operate smoothly, set the switch to the HIGH position. 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 position and use the STANDBY/ON button to switch the power between on and in the standby mode manually. * This function detects the low-frequency components below 200 Hz of the input signals (i.e., the explosion in the action movie, the sound of the bass guitar or the bass drum, etc.). * The minutes required to switch the subwoofer to the standby mode might change by sensing noise from other appliances. This function is available only when the power of the subwoofer is on (by pressing the STANDBY/ON button).

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.

Rear panel

AUTO STANDBY PHASE

ON OFF

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.
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.
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 listener enjoy more powerful sound. (The sound will be thicker 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 and reproduces the melody line more clearly.)
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.
This system is designed so that the optimum tone balance between the subwoofer and the main speakers (NX-430P) is obtained when this control is set at 110 Hz. However, the tone balance may change depending on the room size, the distance from the subwoofer to the main speakers, etc. So, if you prefer, turn the HIGH CUT control and set it to a position where a better tone balance is obtained.
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 amplifiers volume control. However, if you change the main speakers NX-430P 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.
Increase the volume gradually to adjust the volume balance between the subwoofer and the main speakers.
Frequency characteristics
Adjustment of the VOLUME control, the HIGH CUT control and the PHASE switch should be changed depending on the room size, the distance from the subwoofer to the main speakers, sources, etc. Following figures show the optimum adjustment of each control and the frequency characteristics when this subwoofer is combined with NX-430P.
Frequency characteristics of this subwoofer (YST-SW015)
When combined with NX-430P
HIGH CUT50150Hz VOLUME 010
PHASESet to the REV (reverse) position. B.A.S.S.MOVIE

YST-SW015

NX-430P
ADVANCED YAMAHA ACTIVE SERVO TECHNOLOGY (for YST-SW015)

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 speakers 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, lowfrequency 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.

Cabinet High-amplitude bass sound Port Air woofer (Helmholtz resonator) Advanced Negativeimpedance Converter
Active Servo Processing Amplifier

Signals

Signals of low amplitude

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 No sound. Sound level is too low. Cause Speaker cables are not connected securely. Speaker cables are not connected correctly. What to Do Connect them securely. Connect them correctly, that is L (left) to L, R (right) to R, + to + and to.
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 control is set to 0. Speaker cables are not connected securely. Sound level is too low. Speaker cables are not connected correctly. Setting of the PHASE switch is not proper. A source sound with few bass frequencies is played. What to Do Connect it securely. Set the POWER switch to the ON position. Turn the VOLUME control to the right. Connect them securely. Connect them correctly, that is L (left) to L, R (right) to R, + to + and to. Set the switch to the other position. Play a source sound with bass frequencies. Set the HIGH CUT control to a higher position. Reposition the subwoofer or break up the parallel surface by placing bookshelves etc. along the walls. Set the 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 further 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 OFF 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.
There is an influence of noise generated from external appliances etc.
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. There is an influence of noise generated from external appliances etc.

SPECIFICATIONS

NX-430P, NX-C430
Type.. 2-way acoustic-suspension speaker system Magnetic shielding type Driver <NX-430P>.. Coaxial 2-way [5 cm (2) cone and 1.3 cm (1/2) dome] speaker x cm (2) full range cone speaker x 1 <NX-C430>.. Coaxial 2-way [5 cm (2) cone and 1.3 cm (1/2) dome] speaker x cm (2) full range cone speaker x 2 Nominal Input Power.. 30W Maximum Input Power.. 100W Impedance... 6 Power Consumption.. 70 W Frequency Response. 70 Hz to 60 kHz Standby Power Consumption.. 0.8 W Sensitivity <NX-430P>.. 85 dB/2.83V/m <NX-C430>... 86 dB/2.83V/m Dimensions (W x H x D) <NX-430P>. 87 mm x 184 mm x 147 mm (3-7/16 x 7-1/4 x 5-13/16) <NX-C430>.. 273 mm x 81 mm x 147 mm (10-3/4 x 3-3/16x 5-13/16) Weight <NX-430P>.. 1.2 kg (2 lbs. 10 oz.) <NX-C430>.. 1.7 kg (3 lbs. 12 oz.) Dimensions (W x H x D).. 280 mm x 325 mm x 320 mm (11 x 12-13/16 x 12-5/8) Weight.. 9.2 kg (20 lbs. 4 oz.)

YST-SW015

Type.. Advanced Yamaha Active Servo Technology Magnetic shielding type Driver.. 16 cm (6-1/2) cone woofer Amplifier Output.. 70 W/5 Frequency Response. 30 Hz to 200 Hz Power Supply U.S.A. and Canada models.. AC 120V, 60 Hz U.K. and Europe models. AC 230V, 50 Hz Australia model.. AC 240V, 50 Hz China, Korean and General models.. AC 110-120/220-240V, 50/60 Hz
* Specifications are subject to change without notice due to product improvements.
YAMAHA YAMAHA YAMAHA YAMAHA YAMAHA YAMAHA YAMAHA
ELECTRONICS CORPORATION, USA 6660 ORANGETHORPE AVE., BUENA PARK, CALIF. 90620, U.S.A. CANADA MUSIC LTD. 135 MILNER AVE., SCARBOROUGH, ONTARIO M1S 3R1, CANADA ELECTRONIK EUROPA G.m.b.H. SIEMENSSTR. 22-34, 25462 RELLINGEN BEI HAMBURG, F.R. OF GERMANY ELECTRONIQUE FRANCE S.A. RUE AMBROISE CROIZAT BP70 CROISSY-BEAUBOURG 77312 MARNE-LA-VALLEE CEDEX02, FRANCE ELECTRONICS (UK) LTD. YAMAHA HOUSE, 200 RICKMANSWORTH ROAD WATFORD, HERTS WD1 7JS, ENGLAND SCANDINAVIA A.B. J A WETTERGRENS GATA 1, BOX 30053, VSTRA FRLUNDA, SWEDEN MUSIC AUSTRALIA PTY, LTD. 17-33 MARKET ST., SOUTH MELBOURNE, 3205 VIC., AUSTRALIA

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