esults 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-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

High-Linearity

 

 

Suspension with

 

Top Plate

Double Spiders

 

 

 

 

 

100mm (3/8") ￿

Dual-Bias

 

Voice Coil

 

 

Magnet System

 

Heavy-Duty

 

 

Aluminum

 

 

Diecast Frame

 

 

Yoke

 

 

Ferrite Magnets

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.

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

 

Conventional System

Voice Coil

 

Voice Coil

 

100mm (4")

 

100mm (4")

Main Magnet

N

N

 

N

S

S

 

S

N

N

 

N

S

S

 

S

Main Magnet

 

 

Shielding Magnet

SlimWide

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.

Efficient Power Amplifier and Power Supply

YST-SW800 Extra-Long Stroke