T h e D r a m a t i c a l l y D i f f e r e n t

Subwoofers

YST-SW800/YST-SW320

Advanced YST and QD-Bass Subwoofers.

High Power and Superb Bass Clarity.

The Latest Advance in the

Audio Reproduction Excell

Yamaha has a tradition of excellence in creating fine sound that goes back more than a century to when we made our first reed organs. Today, we combine extensive expertise in both sound production (musical instruments) and reproduction (audio and acoustics), making us uniquely capable of creating innovative products to enrich people’s lives.

As the world’s leading musical instrument manufacturer, we use our acoustic craftsmanship to develop a wide range of superior products. Our wideranging capabilities, including woodworking and metallurgical expertise, are put to good use in the creation of audio speakers.

Having established our preeminence in the audio field with legendary products like the NS-1000M monitor speakers, we are now further expanding home entertainment possibilities with an exciting new range of products, of which the YST-SW800 and

YST-SW320 Subwoofers are outstanding examples.

The Dramatically D

Yamaha Tradition of ence.

Subwoofers for the

Digital Era

Now that audio and video have largely moved to digital formats, the demands on speaker systems are greater than ever.

The latest home theater systems, in particular, not only use high-performance

DVD players, but also exploit the merits of advanced sound processing formats like

Dolby Digital and DTS Digital Surround.

Full audio enjoyment of these digital sources requires deep, clear bass response. This is especially true with 5.1

(6.1)-channel sound, because the sixth channel is dedicated to the bass frequencies. That means you not only need a subwoofer, but a subwoofer capable of handling extremely low frequencies and high power levels, as well as accurately reproducing the high quality digital sound. Your best choice? The

YST-SW800 and YST-SW320 Subwoofers.

YST-SW800 YST-SW320

fferent Subwoofers

Innovative Design and Technology

Impressive Subwoofer Performance.

25mm (1") MDF Cabinet

The beautifully finished cabinet uses ultra-thick (25mm; 1") medium density fiberboard for minimum resonance.

Advanced YST

A unique system in which the speaker and amplifier work together to cancel out impedance so the speaker unit has a perfectly linear motion.

The YST-SW800 and YST-SW320 use

Yamaha’s Advanced YST, as well as brand new technologies such as QD-Bass to deliver exceptionally crisp, clean, powerful bass. They have extremely efficient, highpower amplifiers built in, and use extralong stroke, drivers that provide outstanding power with low distortion. The

YST-SW800 also introduces new power supply technology and a driver featuring a

Dual-Bias system with a 100mm (4") diameter voice coil for the ultimate in power and performance. But whichever Yamaha subwoofer you choose, you’ll get dynamic bass that will bring out the full potential of your digital music and movie sources.

Extra-Long Stroke

Drivers

Extra-long stroke, pure spruce multi-range drivers provide outstanding power with low distortion.

QD-Bass

Technology

QD-Bass (Quatre

Dispersion Bass) technology uses downfiring drivers with square, pyramid-shaped reflective plates to radiate the sound efficiently in four horizontal directions.

High Power

Amplifier

The YST-SW800 amplifier is extremely efficient and features an entirely new type of power supply with superior load characteristics, minimal noise, higher efficiency and greater stability.

QD-Bass Technology

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

(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

Results in Truly

Extra-Long Stroke Driver Construction

High-Strength

25cm (10") Spruce Cone

Dust Cap Long Excursion Surround 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.

High-Efficiency Power Amplifier and Power Supply

The YST-SW800 and YST-SW320 deliver high power outputs at deep bass levels, with excellent stability and low power consumption, even with their compact cabinets. This is made possible by highly efficient power amplifier technology and, in the YST-SW800, a new power supply.

The power amplifier achieves superior conversion efficiency by supplying maximum power (minimizing power loss) from the power transistors according to the output level. It delivers stable power output with high efficiency while minimizing power consumption and heat production. It does not require an output filter coil, resulting in extremely low noise and distortion. High speed transient response is also excellent.

The YST-SW800 also uses a new power supply that features superior load characteristics, minimal noise, higher efficiency and greater stability. Switching power supplies, commonly used in audio and other consumer products, are small and efficient, but suffer from noise problems, requiring additional components to solve. This power supply, however, holds the voltage and current levels to zero while

High-Linearity

Suspension with

Double Spiders

Dual-Bias

Magnet System

YST-SW800 Rear Panel the device turns on and off. This reduces noise to 1/30 of conventional switching power supplies. Power loss during switching is also reduced, enabling an incredibly high power conversion efficiency. Other advantages of this power supply include superb stability against power load fluctuations, large capacity, low impedance and silent operation.

Extra-Long Stroke,

Pure Spruce Dual-Bias Drivers

These new drivers provide outstanding power with low distortion and are superior to conventional drivers for a number of reasons. Due to the use of a vertically aligned, dual magnetic circuit structure with 100mm (4") diameter voice coils, they

Ferrite Magnets

Top Plate

100mm (3/8")

⭋

Voice Coil

Heavy-Duty

Aluminum

Diecast Frame

Yoke are able to handle extremely high input power in a compact unit, with low radial distortion. Additionally, the vertically symmetrical gap magnetic flux density distribution reduces secondary

(asymmetrical) distortion.

Double spider construction also aids in handling high bass inputs without cone deformation. And the strong diecast frame firmly anchors the entire body including the magnetic circuit, guaranteeing a structure that will not fail under powerful forces.

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.

Space-Saving Voice Coil (Voice Coil: 100mm (4") )

Dual-Bias System

Voice Coil

100mm (4")

N

S

N

S

Slim

Main Magnet

N

S

N

S

Conventional System

Voice Coil

100mm (4")

Main Magnet

N

S

N

S

Shielding Magnet

Wide

Efficient Power Amplifier and Power Supply YST-SW800 Extra-Long Stroke

Five Ways to Enjoy the Power and of Yamaha Bass.

YST-SW800

Digital Pro Series Subwoofer

This subwoofer is the best that Yamaha has to offer. New design, new technology, and a new dimension of power bass performance. Featuring

QD-Bass technology and Advanced YST, it also introduces a new Dual-Bias driver and a new power supply. Experience bass down to 18Hz with up to 1,000W of power: awesome!

YST-SW320

Digital Pro Series Subwoofer

Another powerful demonstration of the advantages of QD-Bass technology. The

YST-SW320 disperses 250W of pure bass power in four directions from its downfiring drivers. The 25cm (10”) driver has an extra-long stroke design for greater stability and durability. Advanced YST adds to the outstanding performance.

Subwoofers

Advanced Yamaha Active Servo Technology

QD-Bass (Quatre Dispersion Bass) Technology

High-Efficiency Power Amplifier

High-Efficiency Power Supply

Drivers

Magnetic Shielding

High Cut Filter (Continuously Variable Control)

Phase Control (Normal or Reverse)

Auto Standby

BASS (Bass Action Selector System)

Two Input Connections (Speaker or Line Level)

2-Way Binding-Post Speaker Terminals

Output Power

Frequency Response

Dimensions (W x H x D)

Weight

YST-SW800

Yes (Advanced YST)

Yes

Yes

YST-SW320

Yes (Advanced YST)

Yes

Yes

YST-SW160

Yes (Advanced YST)

Yes

25cm (10") multi-range, 25cm (10") multi-range, Dual 20cm (8") multi-range extra-long stroke design extra-long stroke design with dual-bias system

Yes

40–140 Hz

Yes

Yes

Yes

Yes

Yes

1,000 W

18–160 Hz (–10 dB)

390 x 482 x 420 mm

15-3/8" x 19" x 16-9/16"

24 kg; 52.9 lbs.

Yes

40–140 Hz

Yes

Yes

Yes

Yes

Yes

250 W

20–160 Hz (–10 dB)

340 x 432 x 370 mm

13-3/8" x 17" x 14-9/16"

17 kg; 37.5 lbs.

Yes

40–140 Hz

Yes

Yes

Yes

Yes

Yes

150 W

YST-SW90

Yes (Advanced YST)

20cm (8") multi-range

Yes

50–150 Hz

Yes

Yes

Yes

Yes

100 W

YST-SW45

Yes (Advanced YST)

20cm (8") multi-range

Yes

50–150 Hz

Yes

Yes

Yes

70 W

20–160 Hz (–10 dB)

235 x 602 x 463 mm

23–170 Hz (–10 dB)

235 x 485 x 409 mm

30–200 Hz (–10 dB)

235 x 365 x 318 mm

9-1/4" x 23-11/16" x 18-1/4" 9-1/4" x 19-1/8" x 16-1/8" 9-1/4" x 14-3/8" x 12-1/2"

20 kg; 44.9 lbs.

14 kg; 30.9 lbs.

9 kg; 19.8 lbs.

Precision

YST-SW160

Digital Home Theater Subwoofer

With dual 20cm (8") drivers,

Advanced YST and a 150W high power amplifier, this subwoofer is capable of delivering a powerful punch. There’s a BASS (Bass Action

Selection System) mode for automatic adjustment of frequency response,

Phase Control, Auto Standby and a

High Cut Filter.

YST-SW90

Digital Home Theater Subwoofer

An all-discrete 100W high power amplifier and the highly efficient

Advanced YST system give this subwoofer exceptional performance capabilities. A Continuously Variable

High Cut Filter ensures best matching with room conditions and other speakers. Plus Auto Standby and more in a slim design.

YST-SW45

Digital Home Theater Subwoofer

Using the Advanced YST system to deliver deep bass with 70 watts of power from a compact body, the

YST-SW45 provides tremendous value. It also offers useful features like

Continuously Variable High Cut Filter,

Auto Standby and Two-Way Input. A great choice for anyone considering a dual subwoofer system.

Advanced Yamaha Active Servo Technology

(Advanced YST) combines the excellent imaging and point source characteristics of small speakers with the superb bass response of large ones. The key to its success is a

Helmholtz resonator—a small port in the speaker cabinet. The cabinet volume and port size are scaled to an exact ratio, which causes small amplitude input signals to be magnified without distortion. And because zero speaker impedance results in the best reproduction of deep bass tones, the Advanced YST system includes a negative output impedance amplifier. By precisely matching it to the

Helmholtz system, the combined ampspeaker impedance become zero. This enables the compact cabinet to reproduce bass frequencies with close to perfectly flat response. You’re assured of getting the highest levels of sound pressure and overall performance.

To fully optimize bass performance in a highend system, two subwoofers are recommended.

(dB)

90

80

70

Conventional speaker

Speaker + YST Subwoofer

Increased bass reproduction capability

20 50 100 20,000 (Hz )

YAMAHA CORPORATION

P.O. Box 1, Hamamatsu, Japan

"d-cinema" is the slogan of Yamaha A/V products and technology, reflecting our focus on digital technology and our leadership in creating and refining digital home theater.

For details please contact:

Visit us at our website: http://www.yamaha.co.jp/ A-1087UEN 10009D Printed in Japan