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Results in Truly
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
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
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.
Extra-Long Stroke Driver Construction
Dust Cap
High-Strength
25cm (10") Spruce Cone
Long Excursion Surround
High-Linearity
Suspension with
Double Spiders
100mm (3/8") л
Voice Coil
Heavy-Duty
Aluminum
Diecast Frame
Dual-Bias
Magnet System
Top Plate
Yoke
Ferrite Magnets
Conventional SystemDual-Bias System
Space-Saving Voice Coil (Voice Coil: 100mm (4") )
Main Magnet
Main Magnet Shielding Magnet
N
S
N
S
N
S
N
S
N
S
N
S
Voice Coil Voice Coil
100mm (4")
WideSlim
100mm (4")
Efficient Power Amplifier and Power Supply
YST-SW800 Rear Panel
YST-SW800 Extra-Long Stroke