PRECISION SA-CD TRANSPORT
Newly developed high-rigidity, high-precision SA-CD/CD drive
Dedicated digital-output SA-CD/CD transport -ď Totally new ultra-massive SA-CD/CD
drive. Highly rigid, high-precision construction with low center of gravity absorbs vi-
brations. Finely machined and utterly smooth disc loading mechanism with exquisite
tray. High-performance digital audio interface HS-Link.
In order to extract the minute bits of information from the rapidly
spinning disc and decode these accurately into a digital signal of
high purity, vibrations emanating from the rotating medium as well
as any external mechanical vibrations must be minimized. At the
same time, the prevention of resonances is also highly important.
In the DP-800, the SA-CD/CD drive is mounted Ô¨Ā rmly to a strong
aluminum frame, and the drive loading mechanism and mechanical
base form a massive and highly rigid chassis constructed with
utmost precision. Conversely, the traverse mechanism, an integrated
structure consisting of the optical assembly including laser pickup
and rotating parts, is designed for extremely light weight, and isolated from the mechanism base by a Ô¨ā oating suspension arrangement.
Specially selected material is used for viscous damping, supporting
the traverse mechanism at four points.
A large, heavy bridge machined from a single block of aluminum
is joined to the mechanism base for integrated reinforcement. The
entire SA-CD/CD drive assembly is directly mounted to the bottom
chassis. The resulting unit has a very low center of gravity and
affords excellent protection against all kinds of adverse inÔ¨ā uences
from vibrations. Perfectly stable and quiet operation produces a
signal of utmost accuracy.
Sturdy, heavyweight chassis absorbs external vi-
brations Highly rigid and precise construction -úTraverse Mechanism-Ě with Ô¨ā oating design and
viscous damping Integrated construction with oversize heavyweight
aluminum alloy bridge mounted to mechanism
base Low center of gravity further reduces vibrations High-quality disc tray extruded from an aluminum
block, plus super-quiet smooth disc loading mech-
anism -úAdvanced High Carbon-Ě cast iron insulators with
excellent absorption characteristics control vibra-
tions to ensure high sound quality
High-rigidity, high-precision SA-CD/CD drive
Aluminum alloy bridge
-úAdvanced High Carbon-Ě
cast iron insulators for best sound quality
For some time now, Accuphase engineers have been
engaged in an ambitious in-house development
project: to create the ultimate SA-CD drive. With the
introduction of the DP-800, this project has now come to
fruition, culminating in the SA-CD transport mechanism
incorporated in this model.
Compared to a CD drive, an SA-CD drive has a higher
revolution rate, and pickup positioning accuracy as
well as suppression of vibrations must be of a higher
order, to allow full access to the enormous amount
of information stored on the disc. This in turn places
formidable requirements on the mechanical construction
of the drive.
The transport in the DP-800 meets these challenges
in impressive fashion, being designed to extract the
information on the SA-CD one-hundred percent. The
product demonstrates ultimate mechanical precision
matched with ingenuity and the famous Accuphase
dedication to sonic excellence. The ultra-massive SA-
CD drive combines superior rigidity with rock-stable
accuracy. Truly a monumental event in the world of high-
In the transport, a digital servo with a dedicated DSP
assures accurate readout of the signal recorded on the
SA-CD using the DSD (Direct Stream Digital) principle.
This is sustained by a single-lens/twin laser diode pickup
mounted to a high-speed access mechanism.
The transport not only realizes optimal reproduction
of SA-CDs, it also is capable of extracting a super-
accurate signal from conventional CDs. The output for
both SA-CD and CD is provided via the Accuphase
exclusive high-performance digital interface HS-Link
(RJ-45 connector), while the CD output is also available
via a coaxial connector. The HS-Link cable supplied with
the DP-800 can be used for connection to the DC-801 or
to other components.
DP-800 Features and Functions
Newly developed high-rigidity, high-precision
SA-CD/CD drive SA-CD transport supplies remarkably pure
digital signal Excellent signal quality also from conven-
tional CD media Single-lens/twin pickup high-speed access
mechanism Support for text data display Accuphase-ôs proprietary digital audio interface HS-Link (carries both
SA-CD and CD signal) Dedicated coaxial output for CD signal Power-on play feature allows automatic playback Remote commander RC-100 (supplied with DP-800) -Ę Controls DP-800 functions such as direct play, program play, repeat, etc.
-Ę Controls DC-801 functions such as input switching and output level adjustment Both DP-800 and DC-801 feature massive cabinets made of persim-
Digital signal processing assembly
Power supply assembly
HS-Link connector and coaxial output assembly
Block diagram of DP-800