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Extracted text from Accuphase VX 700 Brochure (Ocr-read)
Page 1
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.
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 preser ved. 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 digital-
to-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.
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.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 star t 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.
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.
Fig. 1 VX-700 Block Diagram
VIDEO SELECTOR VOX-1 (Standard Equipment)
Fig. 2 MDS Plus D/A Converter Principle
Note the ratio of signal level vs. conversion error
level: in the MSD output, the conversion error is
much smaller in relation to the signal level. Digital inputSignal
Conversion error
MDS
output
MDS output
Page 2
Logical menu structure and large 40-character
by 2 line display makes operation a breeze
All settings of the VX-700 can be accessed
through a system of layered menus that appear
on the amplysized display panel. This lets you
quickly establish any desired setting.
Controls used for making settings are arranged
on a folding panel that retracts into the unit.
Three rotary jog dial type knobs are assigned
to top-level, medium-level, and low-level items,
with corresponding dialog-type menus.
Optimized speaker settings with automatic
adjustment function
Adjustable delay for all channels up to 20 m
in 1-cm steps
"Small" settings for speakers and subwoofer
Cut-off frequency: 25 settings from 10 - 355 Hz
Cut-off slope: 12/18/24/48 dB/octave, selectable
Display brightness adjustable in five steps
Selectable volume display units: linear or dB
Attenuator level: -“6/-“20/-“30 dB or Mute
Safety lock for all settings
Editable memory and input position names
A/D converter for analog inputs with
selectable sampling frequency: 48/96 kHz
Setup has the following four modes to ensure
smooth and quick operation.
Versatile additional functions and features
Center speaker allows adjustment of dialog
position height
Center level adjustment possible during
playback
Subwoofer level adjustment possible during
playback
6-channel level balance adjustment for
analog inputs
Analog "F" output setting: optimized for 2
subwoofers or 2 surround rear speakers
Speaker equalizer characteristics
compensation: 2 bands for L/R front
speakers and 6 bands for center/surround/
surround rear speakers allow detailed
adjustment
Ready for future version upgrades
With the VX-700, you are not "locked in" when it
comes to compatibility and features. When new
functions or suppor t for new audio formats
become available, you can upgrade the
system software of the unit. This can
be done simply by playing
the Update CD in a
conventional
CD player
connected
to the unit.RS-232 connector for external control
The built-in RS-232
interface makes the
VX-700 compatible
with integrated control
systems for the home
such as AMX.
Supplied remote commander
RC-31
All functions of the main unit except
for the power switch and ALL
CLEAR are duplicated by the remote
commander.
[CONFIG] mode: Basic input environment and general settings
[AUDIO] mode: Audio related settings
[VIDEO] mode: Video related settings
[QUICK] mode: On-the-fly settings during playback
Balanced analog output
assembly
All 8 analog output channels use
an MDS Plus type D/A converter.
Page 4
7 digital audio inputs with editable input namesOPTICAL x 4, COAXIAL x 2, BALANCED
2-channel/6-channel analog inputsSignals from these inputs are converted into digital form by 24bit A/D converters
with 48/96 kHz sampling frequency.
Maximum 8 analog output channels for no-holds-barred surround
playback systems
8 unbalanced and 6 balanced connectors are provided.
Versatile video input configuration designed for high quality
connections
2 S-Video connectors and 4 component inputs (BNC x 1, RCA x 1, D5 x 2) are
provided.
Component video outputs as standard equipmentTwo sets of component outputs (BNC and RCA) are provided. All video signals from
the S-Video inputs are converted to component signals.
RCA component video cable Optical fiber cable
DVD/CD, MD,
broadcast satellite
tuner, TV, etc.
D-connector cable Coaxial digital cable Audio cable
Unbalanced 8 channels, balanced
6 channels
RCA component
video cable
Projector, TV
monitor, etc.
* When using an active subwoofer (with built-in
power amplifier), connect it directly to the "D"
output of the VX-700. Power
amplifiersMax. 8 speakers
Front (L)
Center (C)Front (R)
Surround left
(A)Surround backSurround right
(B) Subwoofer
(D)
Using the digital audio inputs and outputs
Connection of DF-35 for front speaker multi-amping Connection of external DAC or DG-28/DG-38 for sound field compensation in a specific channel
The VX-700 provides a digital output comprising volume data for front left
and right. This lets you connect the Digital Channel Divider DF-35 for multi-
amping of the front speakers.
L/R channel
Coaxial digital cable
To power amplifiers
for other speakers
(except front L/R) To other speakers
(except front L/R)
Front right speaker
(RIGHT) Front left speaker
(LEFT)
Audio cables
High-range
power amplifier Low-range
power amplifier
Connection examples
Connect DG-28/DG-38 for sound field compensation in front (L/R),
center (C) and subwoofer (D) channels
Connect external DAC for surround channels A/B
To A/B channel
speakersExternal D/A converter Audio cables Power amplifier
A/B channel
Coaxial digital cable
To power amplifiers for
other speakers
(except A/B channel)
To other speakers
(except A/B channel)
Center (C)
Subwoofer
(D) Front left (L)Front right (R)
Surround back
(E) (F)
Surround left
(A)Surround right
(B)
VX-700 playback connection examples
To make input and output connections for the VX-700, you first select the appropriate cables and connectors from the available choices
for audio and video. Using the setup menus, you can then assign any audio input to any video input, so that the input selector will switch
both audio and video at the same time. The VX-700 offers an amazing eight output channels (8 unbalanced, 6 balanced connectors), letting
you drive amplifiers for as many as eight speakers. Enjoy surround sound with unsurpassed flexibility and impact.
C/D channel L/R channel