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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.
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
Innovative Design and Technology
Impressive Subwoofer Performance.
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.
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.
QD-Bass Technology