The Dramatically Different

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 peoples lives. As the worlds 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 Yamahas 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, youll 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.

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

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-Linearity Suspension with Double Spiders Dual-Bias Magnet System
Top Plate 100mm (3/8") Voice Coil Heavy-Duty Aluminum Diecast Frame Yoke Ferrite Magnets
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

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

Dual-Bias System

Voice Coil 100mm (4") N S N S Main Magnet N S N S

Conventional System

Voice Coil 100mm (4") Main Magnet N S N S Shielding Magnet
Efficient Power Amplifier and Power Supply
YST-SW800 Extra-Long Stroke
Five Ways to Enjoy the Power and of Yamaha Bass.
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!
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 Yes 25cm (10") multi-range, extra-long stroke design with dual-bias system Yes 40140 Hz Yes Yes Yes Yes Yes 1,000 W 18160 Hz (10 dB) 390 x 482 x 420 mm 15-3/8" x 19" x 16-9/16" 24 kg; 52.9 lbs.
YST-SW320 Yes (Advanced YST) Yes Yes 25cm (10") multi-range, extra-long stroke design Yes 40140 Hz Yes Yes Yes Yes Yes 250 W 20160 Hz (10 dB) 340 x 432 x 370 mm 13-3/8" x 17" x 14-9/16" 17 kg; 37.5 lbs.
YST-SW160 Yes (Advanced YST)
YST-SW90 Yes (Advanced YST)
YST-SW45 Yes (Advanced YST)
Dual 20cm (8") multi-range
20cm (8") multi-range
Yes 40140 Hz Yes Yes Yes Yes Yes 150 W 20160 Hz (10 dB) 235 x 602 x 463 mm 9-1/4" x 23-11/16" x 18-1/4" 20 kg; 44.9 lbs.
Yes 50150 Hz Yes Yes Yes Yes 100 W 23170 Hz (10 dB) 235 x 485 x 409 mm 9-1/4" x 19-1/8" x 16-1/8" 14 kg; 30.9 lbs.
Yes 50150 Hz Yes Yes Yes 70 W 30200 Hz (10 dB) 235 x 365 x 318 mm 9-1/4" x 14-3/8" x 12-1/2" 9 kg; 19.8 lbs.

Precision

YST-SW160
Digital Home Theater Subwoofer

YST-SW90

YST-SW45
With dual 20cm (8") drivers, Advanced YST and a 150W high power amplifier, this subwoofer is capable of delivering a powerful punch. Theres a BASS (Bass Action Selection System) mode for automatic adjustment of frequency response, Phase Control, Auto Standby and a High Cut Filter.
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.
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 resonatora 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. Youre 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) 70

Conventional speaker Speaker + YST Subwoofer Increased bass reproduction capability

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