Yamaha YST-RSW300 User Manual

NEW

NEW

PRODUCT

YST-RSW300

Advanced YST II, Front-Firing Active Subwoofer

PRODUCT

BULLETIN

BULLETIN

High performance subwoofer with Yamaha’s latest
technologies, including PWM Digital Drive Amplifier,
Advanced YST II, Linear Port and front-firing design resulting
in dynamic power of 270W and incredible sound clarity.

䢇 Advanced YST II (Yamaha Active Servo

Technology II)

䢇 PWM Digital Drive Amplifier

䢇 Front-firing active design

䢇 Linear Port for minimizing extraneous noise

䢇 High 270W dynamic power

䢇 25cm (10”) long-stroke cone driver

with magnetic shielding

䢇 20–160Hz frequency response

Cherry finish available
in some areas.

YST-RSW300 Main Specifications

Dynamic Power 270 W

Output Power

(5 ohms, 100Hz) 250 W

Frequency Response 20–160 Hz

Driver 25cm (10”) long-stroke cone

Dimensions (W x H x D) 372 x 400 x 428 mm

14-5/8” x 15-3/4” x 16-7/16”

Weight 20 kg; 44.1 lbs.

“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 theatre.

P10017997W-YSTRSW300@NPB

YST-RSW300 Front-Firing Active Subwoofer

NEW PRODUCT BULLETIN

The Subwoofer: a Vital Part of Your
System

DVDs and digital music sources hold a huge
amount of audio data, including a considerable
amount in the low frequency range. Multi-channel
sound formats dedicate an entire channel to the
low frequencies (the “.1” in 5.1-channel sound),
used to deliver the bass in music and explosions,
thunder and other low frequency sound effects in

Advanced YST II for Awesome Deep
Bass

Yamaha's newly developed Advanced YST
II (Yamaha Active Servo Technology II)
combines negative-impedance and
constant-current principles to drive the
speaker cone with even
tighter control than
previously. Using
Advanced Negative Impedance Converter
(ANIC) circuits, this system dynamically
optimizes effective speaker impedance to
maintain excellent linearity. This means
more stable and accurate low range
response, not to mention higher sound
pressure levels, for more natural and
energetic bass reproduction.

PWM Digital Drive Amplifier

The YST-RSW300 delivers high power
outputs at deep bass levels, with excellent
stability and low power consumption,
thanks to by a highly efficient PWM Digital
Drive amplifier. The 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.

Front-Firing Active Design

The subwoofer features a high
performance front-firing, active design. It
provides power and detailed, accurate
reproduction in a compact unit.

270W Dynamic Power

Capable of handling 270W of dynamic
power, this subwoofer ensures that you
hear all bass sounds, even the loudest
short bursts, with fast attack and total
clarity.

Linear Port

The Linear Port provides smooth bass

YST-RSW300 Connection Panel

movies. Ordinary speakers are not large and
robust enough to handle these frequencies,
especially for long periods. This is where the
subwoofer comes in. By outputting bass sounds
with high power and low distortion, it ensures
that you are not missing anything, and it also
makes the overall sound richer and properly
balanced. A subwoofer is thus a vital part of any
home theater or even music-focused system.

response during playback and minimizes
extraneous noise.

Effect of Linear Port

Advanced YST II produces rich bass sound,
and the addition of a Linear Port reduces
extraneous noise for even higher quality.

Large (25cm; 10”) Long-Stroke Cone
Driver with Magnetic Shielding

The powerful, long-stroke cone driver is
exceptionally large (25cm; 10”) for this
class of subwoofer. Magnetic shielding
means there is no distortion-causing
interference when used near a TV or
other monitor.

Other Notable Features

• 20–160Hz frequency response

• Auto standby with sensitivity selector
(High, Low and Off)

• Phase control (Normal or Reverse)

Advanced YST II Brings You Super Bass.

The effectiveness of Advanced YST II
(Yamaha Active Servo Technology II) is based
upon two principles: the Helmholtz Resonator
and negative-impedance drive. Active Servo
Processing speakers reproduce the bass
frequencies through an “air woofer,” which is
a port or opening in the speaker cabinet. This
port is used instead of, and performs the
functions of, a conventional woofer. Low
amplitude signals inside the cabinet can, due
to the Helmholtz Resonance principle, be
output from this port as high amplitude waves
if the design is such that the size of the port
and the volume of the cabinet are in a certain
proportion. In addition, the wave amplitudes
inside the cabinet must be precise and of
sufficient power, in order to overcome the
“load” presented by the air within the cabinet.

This is accomplished by employing an
amplifier that is capable of supplying special
signals. If the electrical resistance of the
voice coil could be reduced to zero, the

• Dolby, Pro Logic and Double D are trademarks of Dolby Laboratories Corporation. • “DTS ” and “DTS Digital Surround ” are registered trademarks of DTS, Inc.

• CINEMA DSP is a trademark of Yamaha Corporation. • SILENT CINEMA is a trademark of Yamaha Corporation.• Product designs and specifications are subject to change without notice.

movement of the speaker unit would
become linear with respect to signal
voltage. To achieve this, a special negative­impedance output drive amplifier is used,
so the impedances cancel out and become
zero.

By employing negative-impedance
drive circuits, the amplifier is able to
generate precise, low-amplitude low
frequency waves with superior damping
characteristics. These waves are then
radiated from the cabinet opening as high
amplitude signals. This amplifier/speaker
combination is capable of reproducing an
extremely wide range of frequencies with
excellent sound quality and low distortion.

The Advanced YST II takes this
concept a stop further by adopting
Advanced Negative Impedance Converter
(ANIC) circuits. These circuits allow the
converter to dynamically vary in order to
select the optimum values for speaker

impedance variation. With these new circuits,
Advanced YST II provides more stable
performance and higher sound pressure
levels than the former system, resulting in
more natural and energetic bass
reproduction.

Air Woofer
High-Amplitude
Bass Sound

Signals of Low Amplitude

(Helmholtz Resonator)

Cabinet

Por t

Advanced Negative­Impedance Converter

Active
Servo
Processing
Amplifier

Signals