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.
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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
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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, high-
power amplifiers built in, and use extra-
long 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.
High Power
Extra-Long Stroke
Amplifier
The YST-SW800
amplifier is
extremely efficient
and features an
entirely new type of
power supply with
superior load
Drivers
Extra-long stroke, pure
spruce multi-range
drivers provide
QD-Bass Technology
outstanding power with
low distortion.
characteristics,
minimal noise,
higher efficiency
and greater stability.
QD-Bass Technology
QD-Bass (Quatre Dispersion Bass)
QD-Bass
technology uses down-firing drivers with
square, pyramid-shaped reflective plates to
radiate the sound efficiently in four
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.
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
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Results in Truly
Extra-Long Stroke Driver Construction
High-Strength
Dust Cap
Long Excursion Surround
25cm (10") Spruce Cone
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
Top Plate
100mm (3/8") л
Voice Coil
Dual-Bias
Magnet System
Heavy-Duty
Aluminum
High-Efficiency Power Amplifier
and Power Supply
Diecast Frame
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
Yoke
Ferrite Magnets
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.
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
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.
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.
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
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
problems, requiring additional components
to solve. This power supply, however, holds
the voltage and current levels to zero while
Space-Saving Voice Coil (Voice Coil: 100mm (4")
)
Dual-Bias System
Conventional System
Voice Coil
Voice Coil
Main Magnet
100mm (4")
100mm (4")
N
S
N
S
N
S
N
S
N
S
N
S
Main Magnet
Shielding Magnet
Slim
Wide
Efficient Power Amplifier and Power Supply
YST-SW800 Extra-Long Stroke
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Five Ways to Enjoy the Power and
of Yamaha Bass.
YST-SW800
YST-SW320
Digital Pro Series Subwoofer
Digital Pro Series Subwoofer
This subwoofer is the best that Yamaha
has to offer. New design, new
Another powerful demonstration of the
advantages of QD-Bass technology. The
YST-SW320 disperses 250W of pure bass
power in four directions from its down-
firing drivers. The 25cm (10”) driver has
an extra-long stroke design for greater
stability and durability. Advanced YST
adds to the outstanding performance.
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!
Subwoofers
YST-SW800
YST-SW320
YST-SW160
YST-SW90
YST-SW45
Advanced Yamaha Active Servo Technology
QD-Bass (Quatre Dispersion Bass) Technology
High-Efficiency Power Amplifier
High-Efficiency Power Supply
Drivers
Yes (Advanced YST)
Yes (Advanced YST)
Yes (Advanced YST)
Yes (Advanced YST)
Yes (Advanced YST)
Yes
Yes
Yes
Yes
Yes
25cm (10") multi-range,
25cm (10") multi-range,
Dual 20cm (8") multi-range
20cm (8") multi-range
20cm (8") multi-range
extra-long stroke design extra-long stroke design
with dual-bias system
Magnetic Shielding
Yes
Yes
Yes
Yes
Yes
High Cut Filter (Continuously Variable Control)
Phase Control (Normal or Reverse)
Auto Standby
40–140 Hz
40–140 Hz
40–140 Hz
50–150 Hz
Yes
50–150 Hz
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
BASS (Bass Action Selector System)
Two Input Connections (Speaker or Line Level)
2-Way Binding-Post Speaker Terminals
Output Power
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
1,000 W
250 W
150 W
100 W
70 W
Frequency Response
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.
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.
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
Dimensions (W x H x D)
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.
Weight
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Precision
YST-SW160
YST-SW90
YST-SW45
Digital Home Theater Subwoofer
Digital Home Theater Subwoofer
Digital Home Theater Subwoofer
With dual 20cm (8") drivers,
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 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.
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 amp-
speaker 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 high-
end system, two subwoofers are
recommended.
(dB)
90
80
70
Conventional speaker
Speaker + YST Subwoofer
Increased bass reproduction capability
20
50
100
20,000
(Hz )
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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:
A-1087UEN 10009D Printed in Japan
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