Yamaha RX-V640 User Manual

RX-V640

NEW PRODUCT BULLETIN

Digital Home Theater Receiver

RX-V640

High performance, extremely versatile receiver designed to serve as

the core component of any high quality home theater system. Major features include

6-channel discrete amplification (85W x 6, FTC), Yamaha’s Digital ToP-ART design concept, Quad-Field

CINEMA DSP, 24 surround programs and SILENT CINEMA. Compatible with the newest 6.1-channel

movie sound formats including Dolby Digital EX,

DTS-ES Matrix 6.1, DTS-ES Discrete 6.1, Dolby Pro Logic II and DTS Neo:6.

Enjoy Home Theater the Way You've Always Imagined It:

Dynamic, Realistic Surround Sound with Many Program Variations.

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Superior Technology and Design for Flawless
Performance and Comprehensive System Control.

䡲 High power 6-channel discrete

amplifier configuration (125W x 6
Max)

䡲 Digital ToP-ART (Total Purity

Audio Reproduction Technology)

䡲 High Current Amplification for

high sound quality

䡲 Easy setup and operation
䡲 Compatibility with latest movie

sound formats including Dolby
Digital EX, Dolby Pro Logic II,
DTS-ES Discrete 6.1, and DTS
Neo:6

䡲 Powerful 32-bit Yamaha LSI

(YSS-938) for CINEMA DSP
processing

䡲 24 surround programs (44

variations) with SILENT CINEMA
and Night Listening mode

䡲 Extensive input capability

including 4 optical/1 coaxial
digital, 5 S-video, 5 A/V and 2
audio inputs

Digital T oP-ART

Digital ToP-ART
(Total Purity Audio
Reproduction

Technology) is the
name Yamaha has given to a design
philosophy whose goal is to maximize
digital quality while minimizing analog
circuitry. The culmination of the best
digital engineering and design possible
today, it brings together several key
elements to create the best-sounding,
easiest-to-use A/V components available

Advanced Decoding Circuitry
Including Y amaha’ s Exclusive
YSS-938 32-Bit Floating Point
Quantization LSI

The decoding circuitry performs Dolby
Pro Logic II, Dolby Digital, Dolby Digital
EX, DTS Digital Surround, DTS-ES (DTS­ES Matrix 6.1 and DTS-ES Discrete 6.1),
and DTS Neo:6 decoding with extreme
accuracy, as well as all digital sound
field processing. It also outperforms
other systems in the precise
synchronization of images and sound. Its
low 3V power consumption minimizes
digital noise.

96kHz/24-Bit DACs for All Channels

The RX-V640’s vitally important digital-to­analog converters use an extremely
96kHz/24-bit high performance. They
perform accurate sound field
reproduction for high quality multi-channel
sources, and for two-channel stereo,
provide outstanding separation and
precise musical delineation. They deliver
superior low level linearity with excellent
full-scale performance under varying
operation conditions.

4-Layer DSP Processing Board

All of the DSP IC chips and related
circuitry are located together on a 4-layer
board. This is the first time a 4-layer
board has been used, and it provides a
number of advantages. The dimensions

Yamaha’s Exclusive
YSS-938 32-Bit Floating
Point Quantization LSI

Digitally Regulated Volume
Control Device (Yamaha
Original YAC-520 LSI)

RX-V640

Digital Home Theater Receiver

2/10 (R/L/T/K)

RX-V640

NEW PRODUCT BULLETIN

3

High Current
Amplification

6-Ch High
Output Power

• Main L

• Main R

• Center

• Rear L

• Rear R

• Rear Center

From digital input, through

digital processing, to

amplification, maximum

Digital
Input

6-Ch
Input

2

32-Bit High-Density
Cinema DSP Circuitry

Advanced
Decoding
Circuitry
Including
32-Bit DSP
LSI
(YSS-938)

High Performance Digital Circuitry

96 kHz/
24-Bit
DACs
for All 9*
Channels

Input
6-Ch

1

Accurate
Touch
Volume
Control
(0—-99dB,

0.5 dB
Step) for
6 Channels*

signal quality is maintained

every step of the way.

* In addition to the six channels (Main L/R, Center, Rear L/R, Rear Center) there is a subwoofer output (hence 6.1-channel format compatibility) and two front

effect channels (a total of 9 DACs).The front effect channel signals, unique to Yamaha CINEMA DSP, are mixed with the main channel signals to achieve more
precise separation of dialogue, music and effects on the front sound stage and a superior sense of presence as compared to other systems.

are smaller (2/3 previous types), so
signal paths are shorter and there is
more space for the large power supply
components. Digital interference is
reduced and impedance is lower as well.

Accurate T ouch V olume Control

No one expects more from a volume

control than up and down — except
Yamaha. We decided that controlling
the volume could be made both easier
and more accurate, and the result is the
Accurate Touch Volume Control. It lets
you make delicate adjustments within a
narrow range, yet enables you to move
to very high or low levels more quickly.

Minimal Analog
Processing

Its extreme accuracy is due to a high­signal-resolution analog design in
conjunction with an ultra-precise digital
control circuit (Yamaha original YAC-520
LSI). The wide control range extends
from 0dB to 99dB, with narrow 0.5dB
steps throughout the entire range for
delicate control, even at low volumes.

Brief Guide to Movie Sound Formats

䢇 Dolby Pro-Logic

Dolby Lab’s basic 4-channel format, widely
used in ordinary theaters and for home
videos.

䢇 Dolby Pro Logic II

Improved version of Dolby Pro-Logic for
music and movies. With a more intelligent
matrix decoder, it is suitable for both stereo
and surround-encoded sources. It offers
“bass management” as well as the option of
incorporating “width,” “dimension” and
“panorama” controls.

䢇 Dolby Digital

The most popular 5.1-channel home theater
sound system. An improvement over Dolby
Pro-Logic in that it offers: 1) Full frequency

response in all channels (3Hz — 20kHz), 2)
discrete surround channels, and 3) a
separate track for bass only, called the Low
Frequency Effects channel.

䢇 Dolby Digital EX

Dolby's latest surround format, this is Dolby
Digital with an added center rear channel.
The rear center channel is actually matrixed
into the two rear channels, and is extracted
upon playback. (Formerly called Dolby
Digital Surround EX, or Dolby Digital Matrix

6.1.)

䢇 DTS Digital Surround

The basic DTS 5.1 channel sound format.
Uses a higher data rate than Dolby Digital.

䢇 DTS-ES Matrix 6.1

In this format, the back surround channel is
matrix encoded into the left and right
surround channels. For playback, the three
channels are separately decoded.

䢇 DTS-ES Discrete 6.1

DTS-ES uses its large bandwidth to provide
a fully discrete rear center channel, as
opposed to a matrixed one.

䢇 DTS Neo:6

Provides 5.1 or 6.1 channels of matrix
decoding from stereo matrix material. Also
decodes Extended Surround matrix
soundtracks and has a Music mode to
expand stereo non-matrix recordings to 5.1
or 6.1 channels.

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