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Yamaha YST-SW215

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About

Yamaha YST-SW215Yamaha YST SW215 Subwoofer - 120 Watt

Yamaha - Subwoofer

The YST-SW215 is Yamaha's newest subwoofer model, designed to provide extremely high quality bass performance for the enjoyment of both music and movies. It uses two highly acclaimed technologies, Advanced YST and QD-Bass, to deliver deep and powerful bass with an amazing degree of clarity. A BASS (Bass Action Selector System) switch lets you choose between Music and Movie modes and you can also adjust the cutoff frequency of the high cut filter, giving you the best possible response with ev... Read more

 

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Comments to date: 1. Page 1 of 1. Average Rating:
jotuna 1:45pm on Sunday, April 4th, 2010 
This sub has some great features. Crossover and Power adjustments on the front where they are easy to access and adjust. Sub performs flawlesly.

Comments posted on www.ps2netdrivers.net are solely the views and opinions of the people posting them and do not necessarily reflect the views or opinions of us.

 

Documents

doc0

YST-SW315 YST-SW215

Subwoofer System

OWNERS MANUAL
+ORQTVCPV 5CHGV[ +PUVTWEVKQPHO

(TKFC[ /CTEJ

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
accordance with the manufacturers instructions.
Explanation of Graphical Symbols
The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert you to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert you to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance.
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.
WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
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.
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.
13 Unplug this apparatus during lightning storms or when
unused for long periods of time.
14 Refer all servicing to qualified service personnel.
Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. Be sure to allow spaces of at least 20 cm above, behind and on both sides of the unit. Do not place the following objects on the unit: A vessel with water in it. If the vessel falls by vibrations and water spills, it may cause damage to the unit, and/or you may get an electric shock.
FCC INFORMATION (for US customers) 1 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.
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.

YST-SW315_215_03.25UB.fm Page 1

Tuesday, April 15, 2003

12:05 PM
Thank you for selecting this YAMAHA subwoofer system.
CAUTION: Read this before operating your unit
Please read the following operating precautions before use. YAMAHA will not be held responsible for any damage and/or injury caused by not following the cautions below.
To assure the finest performance, please read this manual carefully. Keep it in a safe place for future reference. Install this unit in a cool, dry, clean place - away from windows, heat sources, sources of excessive vibration, dust, moisture and cold. Avoid sources of humming (transformers, motors). 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 at least 20 cm of space above, behind and on both sides of the unit to prevent fire or damage. Furthermore, do not position with the rear panel facing down on the floor or other surfaces. Do not cover the rear panel of this unit with a newspaper, a tablecloth, a curtain, etc. in order not to obstruct heat radiation. If the temperature inside the unit rises, it may cause fire, damage to the unit and/or personal injury. Do not place the following objects on this unit: Glass, china, small metallic etc. If glass etc. falls by vibrations and breaks, it may cause bodily injury. A burning candle etc. If the candle falls by vibrations, it may cause fire and bodily injury. A vessel with water in it If the vessel falls by vibrations and water spills, it may cause damage to the speaker, and/or you may get an electric shock. Do not place this unit where foreign objects such as water drips might fall. It might cause a fire, damage to this unit, and/or personal injury. Never put a hand or a foreign object into the YST port located on the right side of this unit. When moving this unit, do not hold the port as it might cause personal injury and/or damage to this unit. Never place a fragile object near the YST port of this unit. If the object falls or drops by the air pressure, it may cause damage to the unit and/or personal injury. Never open the cabinet. It might cause an electric shock since this unit uses a high voltage. It might also cause personal injury and/or damage to this unit. When using a humidifier, be sure to avoid condensation inside this unit by allowing enough spaces around this unit or avoiding excess humidification. Condensation might cause a fire, damage to this unit, and/or electric shock. Super-bass frequencies reproduced by this unit may cause a turntable to generate a howling sound. In such a case, move this unit away from the turntable. This unit may be damaged if certain sounds are continuously outputted at high volume level. For example, if 20 Hz-50 Hz sine waves from a test disc, bass sounds from electronic instruments, etc. are continuously outputted, or when the stylus of a turntable touches the surface of a disc, reduce the volume level to prevent this unit from being damaged. If you hear distorted noise (i.e., unnatural, intermittent rapping or hammering sounds) coming from this unit, reduce the volume level. Extremely loud playing of a movie 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. Secure placement or installation is the owners responsibility. YAMAHA shall not be liable for any accident caused by improper placement or installation of speakers.

YST-SW315_215_03.25UB.fm Page 2
VOLTAGE SELECTOR (For China, Korea 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. Voltages are 110/120/220/240 V AC, 50/60 Hz. 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 units 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.

CONTENTS

CAUTION...1 FEATURES...3 SUPPLIEDACCESSORIES..3 PLACEMENT...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..12 Plug in the subwoofer to the AC outlet..12 CONTROLSANDTHEIRFUNCTIONS.13 AUTOMATICPOWER-SWITCHING FUNCTION...15 ADJUSTINGTHESUBWOOFER BEFOREUSE...16 Frequency characteristics...17 ADVANCEDYAMAHAACTIVESERVO TECHNOLOGY...18 TROUBLESHOOTING..19 SPECIFICATIONS..20
This unit features a magnetically shielded design, but there is still a chance that placing it too close to a TV set might impair picture color. Should this happen, move this unit away from the TV set.
For U.K. customers If the socket outlets in the home are not suitable for the plug supplied with this appliance, it should be cut off and an appropriate 3 pin plug fitted. For details, refer to the instructions described below. Note: The plug severed from the mains lead must be destroyed, as a plug with bared flexible cord is hazardous if engaged in a live socket outlet.
SPECIAL INSTRUCTIONS FOR U.K. MODEL
IMPORTANT: THE WIRES IN MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE: Blue: NEUTRAL Brown: LIVE As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows: The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK. The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED. Making sure that neither core is connected to the earth terminal of the three pin plug.

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.
YST-SW315_215_03.25UB.fm Page 3

FEATURES

This subwoofer system employs Advanced Yamaha Active Servo Technology which Yamaha has developed for reproducing higher quality super-bass sound. (Refer to page 18 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 the subwoofer, the subwoofers super-bass 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 B.A.S.S. button.

SUPPLIED ACCESSORIES

After unpacking, check that the following parts are contained.

Non-skid pads

QD-Bass Technology QD-Bass (Quatre Dispersion Bass) technology uses square, pyramid-shaped reflective plates to radiate the sound in four horizontal directions.
YST-SW315_215_03.25UB.fm Page 4

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 main speaker. (See fig. A.) If using two subwoofers, 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.
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.

Use the non-skid pads

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

: subwoofer,

: main speaker)
YST-SW315_215_03.25UB.fm Page 5

CONNECTIONS

Choose one of the following two connecting methods that is more suitable for your audio system. Choose 1 Choose 2
(pages 5-7) if your amplifier has line output (pin jack) terminal(s) (pages 8-11) if your amplifier has no line output (pin jack)

terminal

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 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 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. 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 8-11.) 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.

YST-SW315_215_03.25UB.fm Page 6

Using

one subwoofer

<YST-SW315>

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

Amplifier

<YST-SW215>

To AC outlet

Audio pin cable (not included)
YST-SW315_215_03.25UB.fm Page 7

Using two subwoofers

Mono pin cable (not included)
YST-SW315_215_03.25UB.fm Page 8

2:22 PM

Connecting to speaker output terminals of the amplifier
Select this method if your amplifier has no line output (pin jack) terminal.
If your amplifier has two sets of main speaker output terminals and both terminals can output sound signals simultaneously.
Connect one set of main speaker output terminals of the amplifier to the INPUT1 terminals of the subwoofer, and connect the other set of main speaker output terminals of the amplifier to the main speakers. Set the amplifier so that both sets of main speaker output terminals output sound signals simultaneously.
If your amplifier has only one set of main speaker output terminals, see page 10.
Using one subwoofer (with speaker cables)
Right main speaker Subwoofer Left main speaker
To AC outlet Speaker output terminals Amplifier
YST-SW315_215_03.25UB.fm Page 9
Using two subwoofers (with speaker cables)
Right main speaker Left main speaker Speaker output terminals Amplifier

Subwoofer

Right main speaker Speaker output terminals Amplifier Left main speaker
YST-SW315_215_03.25UB.fm Page 10 Tuesday, April 15, 2003
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.
Right main speaker Left main speaker

Speaker output terminals

YST-SW315_215_03.25UB.fm Page 11 Tuesday, April 15, 2003
To AC outlet To AC outlet
YST-SW315_215_03.25UB.fm Page 12 Tuesday, April 15, 2003
Connecting to the INPUT1/OUTPUT terminals of the subwoofer
For connection, keep the speaker cables as short as possible. Do not bundle or roll up the excess part of the cables. If the connections are faulty, no sound will be heard from the subwoofer or the speakers, or both of them. Make sure that the + and polarity markings of the speaker cables are observed and set 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 conection are also possible. 1 Tighten the terminal knob. 2 Simply insert the banana plug into the terminal.

Before connecting

Remove the insulation coating at the extremity of each speaker cable by twisting the coating off.
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. 4 Test the firmness of the connection by pulling lightly on the cable at the terminal.

Good No Good

How to connect: <YST-SW315>
1 Loosen the terminals knob, as shown in the figure. 2 Insert the bare wire. 3 Tighten the knob. 4 Test the firmness of the connection by pulling lightly on the cable at the terminal.
Red: positive (+) Black: negative ()
Plug in the subwoofer to the AC outlet
After all connections are completed, plug in the subwoofer and other audio/video components to the AC outlet.
YST-SW315_215_03.25UB.fm Page 13 Tuesday, April 15, 2003
CONTROLS AND THEIR FUNCTIONS

Front panel

Rear panel (General model)
YST-SW315_215_03.25UB.fm Page 14 Tuesday, April 15, 2003
1 Power indicator Lights up in green while the subwoofer is on. Lights up in red while the subwoofer is set in the standby mode by the operation of the automatic powerswitching function. Goes off when the subwoofer is set in the standby mode. 2 STANDBY/ON button Press this button to turn on the power when the POWER switch is set in the ON position. (The power indicator lights up in green.) Press again to set the subwoofer in the standby mode. (The power indicator goes off.) Standby mode The subwoofer is still using a small amount of power in this mode. 3 B.A.S.S. (Bass Action Selector System) button When this button is pressed in to the MUSIC position, the bass sound in audio software is well reproduced. By pressing the button again so that it pops out at the MOVIE position, the bass sound in video software is well reproduced.
7 POWER switch Normally, set this switch to the ON position to use the subwoofer. In this state, you can turn on the subwoofer or turn the subwoofer into the standby mode by pressing the STANDBY/ON button. Set this switch to the OFF position to completely cut off the subwoofers power supply from the AC line. 8 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.) 9 INPUT1 (FROM AMPLIFIER) terminals Used to connect the subwoofer with the speaker terminals of the amplifier. (Refer to CONNECTIONS for details. 0 INPUT2 terminals Used to input line level signals from the amplifier. (Refer to CONNECTIONS for details.) A 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 15. 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. B PHASE switch Normally this switch is to be set to the REV (reverse) position. However, according to your speaker systems or the listening condition, there may be a case when better sound quality is obtained by setting this switch to the NORM (normal) position. Select the better position by monitoring the sound.

4 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. 5 VOLUME control Adjusts the volume level. Turn the control clockwise to increase the volume, and counterclockwise to decrease the volume. 6 VOLTAGE SELECTOR switch (China, Korea and General models only) If the preset setting of the switch is incorrect, set the switch to the proper voltage (110V, 120V, 220V or 240V) 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.
YST-SW315_215_03.25UB.fm Page 15 Tuesday, April 15, 2003
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 to 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).

YST-SW315_215_03.25UB.fm Page 16 Tuesday, April 15, 2003
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.
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 the level a little higher than the main speakers rated minimum reproducible frequency*. * The main 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 main speakers. Normally, set the control to the level where you can obtain a little more bass effect than when the subwoofer is not used. If the desired response cannot be obtained, adjust the HIGH CUT control and the VOLUME control again. Set the PHASE switch to the position which gives you the better bass sound. Normally, set the switch to the REV (reverse) position. If the desired response cannot be obtained, set the switch to the NORM (normal) position.
Select MOVIE or MUSIC according to the played source. MOVIE: When a movie type source is played, the lowfrequency effects are enhanced to allow the listeners enjoy more powerful sound. (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.)
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 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 17.
YST-SW315_215_03.25UB.fm Page 17 Tuesday, April 15, 2003
Frequency characteristics
This subwoofers frequency characteristics <YST-SW315>
HIGH CUT 40 Hz HIGH CUT 90 Hz HIGH CUT 140 Hz

HIGH CUT 90 Hz

HIGH CUT 140 Hz

HIGH CUT 40 Hz

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 <YST-SW315>

YST-SW315

YST-SW215
PHASE : Set to the REV(reverse) position

Main speaker

EX.2 When combined with an 8 or 10 (20 cm or 25 cm) acoustic suspension, 2 way system main
YST-SW315_215_03.25UB.fm Page 18 Tuesday, April 15, 2003
ADVANCED YAMAHA ACTIVE SERVO TECHNOLOGY
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.

YST-SW315_215_03.25UB.fm Page 20 Tuesday, April 15, 2003

SPECIFICATIONS

Type. AdvancedYamahaActiveServoTechnology Driver <YST-SW315>..25 cm (10) cone woofer (JA2564) Magneticshieldingtype <YST-SW215>.20 cm (8) cone woofer (JA2165) Magneticshieldingtype AmplifierOutput(100Hz,5ohms,10%THD) <YST-SW315>... 250W <YST-SW215>... 120W FrequencyResponse <YST-SW315>. 20 Hz - 160 Hz (10 dB) <YST-SW215>. 28 Hz - 200 Hz (10 dB) PowerSupply USA and Canada models. AC 120V, 60 Hz U.K. and Europe models. AC 230V, 50 Hz Australia model.. AC 240V, 50 Hz China, Korea and General models. AC110/120/220/240V,50/60Hz PowerConsumption <YST-SW315>... 80W <YST-SW215>... 95W StandbyPowerConsumption.0.5W Dimensions(WxHxD) <YST-SW315>. 350 mm x 430 mm x 382 mm (13-3/4 x 16-15/16 x 15-1/16) <YST-SW215>. 290 mm x 360 mm x 322 mm (11-7/16 x 14-3/16 x 12-11/16) Weight <YST-SW315>..19 kg (41 lbs. 13 oz.) <YST-SW215>.11.5 kg (25 lbs. 60 oz.) Pleasenotethatallspecificationsaresubjecttochange withoutnotice.

4UB-out.fm

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YST-SW215
http://www.yamaha.com/yec/products/productdetail.html?CNTID=200.
150 Watt Powered Subwoofer Yamaha's Finest Subwoofer for Music or Video
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Technology QuickView

This product includes these technologies

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11/28/2007 3:22 PM
Advanced YST Advanced Yamaha Active Servo Technology (Advanced YST) is a unique system in which the speaker and amplifier work together to cancel out impedance so the speaker unit has a perfectly linear motion. Advanced YST helps to ensure the highest levels of sound pressure and overall performance.
QD-Bass Technology QD-Bass (Quatre Dispersion Bass) technology uses down-firing drivers with square, pyramid-shaped reflective plates to radiate the sound efficiently in four horizontal directions. The reflective plates negate any effects caused by the floor surface and reduce resonance between sound waves reflected from the floor and the unit.
ADVANCED ACTIVE SERVO TECHNOLOGY Yamaha's Advanced Active Servo Technology is a complementary amplifier/speaker system utilizing negative impedance feedback in the amp and a Helmholtz resonator in the speaker to provide strong and accurate bass. 8-INCH DRIVER AND 150 WATT AMPLIFIER* High amplifier power assures enough power to deliver shattering movie theater-like bass effects, and the down firing 8-inch cone driver translates the power into clear bass sound. The YST-SW215 has a frequency range of 30 to 200 Hz. BASS SELECTOR Yamaha's BASS (Bass Action Selector Switch) tailors the sub's output for video or music at the touch of a switch. YAMAHA QD-Bass TECHNOLOGY A Yamaha technology that uses a down firing driver to radiate the bass output more efficiently. Sound is radiated in all directions for greater impact. MAGNETIC SHIELDING The subwoofer is magnetically shielded so it can be placed near a TV monitor or receiver without fear that it will degrade the picture. CONTINUOUSLY VARIABLE HIGH-CUT FILTER The user adjustable continuously variable high-cut filter sets the highest frequency the subwoofer will deliver. It can be set anywhere from 50 to 150 Hz. For instance, if the filter is set at 75 Hz, only frequencies 75 Hz or below will be delivered by the subwoofer. This allows the sub's output to be matched to the other speakers in the system and the room's acoustics for a seamless presentation. VOLUME CONTROL The volume control permits the perfect matching of the sub's output to the overall volume of the system. SIGNAL SENSING ON/OFF For convenience, the YST-SW215 has a signal sensing circuit.When the subwoofer detects an audio signal, it turns its power on. When it senses no signal for several minutes, it shuts itself off. PHASE NORMAL/REVERSE SWITCH Makes it easy to phase the subwoofer with the other speakers in your system. DUAL INPUTS Two sets of inputs allow the versatile subwoofer to accept either line level or speaker level input signals. HEAVY-DUTY SPEAKER TERMINALS Yamaha's three-way speaker terminals accept banana plug and a variety of other connectors, as well as speaker wire. BLACK ASH FINISH

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Technical specifications

Full description

The YST-SW215 is Yamaha's newest subwoofer model, designed to provide extremely high quality bass performance for the enjoyment of both music and movies. It uses two highly acclaimed technologies, Advanced YST and QD-Bass, to deliver deep and powerful bass with an amazing degree of clarity. A BASS (Bass Action Selector System) switch lets you choose between Music and Movie modes and you can also adjust the cutoff frequency of the high cut filter, giving you the best possible response with every sound source. Sophisticated and powerful, this subwoofer will make every system sound a great deal better.

General
Product TypeSubwoofer
Width11.4 in
Depth12.7 in
Height14.2 in
Weight25.4 lbs
Available Body ColorsBlack, cherry
Speaker System
Speaker TypeActive
Nominal (RMS) Output Power120 Watt
Max (RMS) Output Power150 Watt
Response Bandwidth30 - 200 Hz
Crossover Frequency50 - 150Hz
Output FeaturesBass Reflex
Magnetic ShieldYes
Audio AmplifierIntegrated
Connectivity TechnologyWired
ControlsSubwoofer volume control, power on/off, bass, subwoofer phase, subwoofer cut frequency
Additional FeaturesAuto power on/off
Speaker System Details
Speakers IncludedSubwoofer - 120 Watt - 30 - 200 Hz - 5 Ohm - wired
Driver DetailsSubwoofer : 1 x subwoofer driver - 8"
Connections
Connector Type1 x audio line-in ( RCA phono x 2 ) 2 x speakers input ( click-fit x 2 ) 2 x speakers output ( click-fit x 2 )
Power
Power DevicePower supply - internal
Power Consumption Operational95 Watt
Universal Product Identifiers
BrandYamaha
Part NumberYST-SW215

 

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