Accuphase VX-700, VX-700-T Brochure

m Decoders for latest audio formats m 32bit high speed floating point

DSP m MDS Plus type D/A converters for all 8 channels m Auto level
adjustment for each speaker m Large 40 character × 2 line display for
smooth function control m Lip-sync function m Total separation of
audio and video sections m Optional line doubler and quadrupler

* Licenses for the various audio decoding formats pending.

The Home Theater Reference Experience a sound stage of overwhelming
realism. Build a true high-end home theater with this superb A/V Control
Center. 32bit floating point processors operating at high speed perform all
DSP functions. Analog output in 8 channels is created by MDS Plus type
D/A converters. 40 character × 2 line display shows settings and allows quick
access. Automatic speaker level adjustment assures highly accurate results.

The VX-700 is an A/V Control Center
designed specifically for true high-end home
theater applications. It handles both sound
and video with the same unwavering
dedication to quality. Super advanced digital
audio technology developed by Accuphase
is of course in full evidence, and picture quality
also is honed to the highest level. Enjoy home
theater ambience and realism as never
experienced before.

The VX-700 incorporates two high speed
32bit DSP devices operating with software
specially developed by Accuphase to decode
a multitude of audio formats. Internal digital­to-analog conversion is performed by MDS
Plus type D/A converters in all eight channels.
The resulting sound quality is on a par with
the best of high-end pure audio components.
A versatile array of digital inputs and outputs
allows connection of external components
(such as the DF-35 or DG-28/DG-38) after
DSP processing. The supplied microphone
serves to automatically adjust speaker levels.
Other functions accessible through a set of
layered menus include accurate lip-sync
adjustment and a memory for seven audio
setting patterns. The large display makes
navigating the menus easy and intuitive.

The VX-700 is also well equipped to handle
video signals from advanced sources with
ever improving quality. The audio and video
sections of the unit are kept completely
separate to prevent interference and
unwanted interaction. This applies not only
to the electrical circuitry and the power supply
but also to physical construction and rear
panel design.

32bit high speed floating point DSPs

All audio signals input to the VX-700 are
processed in the digital domain using highly
advanced DSP (Digital Signal Processor)
technology. Two ultra fast SHARC processors
from Analog Devices provide the muscle to
handle very large amounts of data with utmost
precision. There is no need to eliminate any signal
data, so that even the finest details can be
faithfully preserved.

MDS Plus type D/A converters in all eight
channels

To create the analog audio output signals, the
VX-700 harnesses the best D/A converter
technology available. Called MDS Plus, this
revolutionary converter principle employs multiple
Delta-Sigma converters mounted in a parallel
configuration. When the output signals of the
converters are combined, even minute
conversion imprecisions are canceled out,
resulting in a drastic
improvement of all
major performance
aspects, such as
conversion accuracy,
S/N ratio, dynamic
range, linearity, and
freedom from distortion.

Signal

Conversion error

Digital input

MDS output

Note the ratio of signal level vs. conversion error
level: in the MSD output, the conversion error is

Fig. 2 MDS Plus D/A Converter Principle

Superb picture quality

The VX-700 offers six video inputs including
facilities for component and S-Video signals.
The video switcher uses a high-performance
wide-band amplifier with a range extending
beyond 100 MHz, allowing it to handle even
the doubler component of high-definition
broadcast satellite signals.

Intelligent operation modes let you enjoy
surround sound straight away

After connecting input and output devices and
the loudspeakers, you can start enjoying
surround sound with the default settings simply
by operating the input selector and volume
control. This is made possible by modes for a
2-channel systems (using SRS TruSurround)
and a 5.1-channel system.

much smaller in relation to the signal level.

MDS
output

VIDEO SELECTOR VOX-1 (Standard Equipment)

Fig. 1 VX-700 Block Diagram

Useful lip-sync function

Because the video signal and audio signal pass
through different digital circuits, a time lag can
occur between the mouth movements of the
actors and the soundtrack heard over the
speakers. This is compensated for by delaying
the audio signal timing in relation to the video
signal. The lip-sync function gives you control
over this process by providing an adjustment
range of 20.0 frames in 0.1-frame steps. The
adjustment can be made while watching actual
program material, for utmost flexibility.

Seven audio setting patterns can be stored
in memory, for quick recall, check, or editing.

Total separation (internal construction and
rear panel) of audio and video sections
prevents any possibility of mutual
interference.