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Accuphase Exclusive Digital Interface
HS-Link is an ultra high-quality digital audio interface developed by Accuphase using latest digital signal trans-
mission technology. It supports send/receive verifi cation for copyright protection. The LVDS (Low Voltage Differ-
ential Signaling) principle allows a single dedicated HS-Link cable to transmit all audio data with utmost fi delity.
Sampling frequencies
32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz
(16 to 24 bit, 2-channel PCM)
176.4 kHz, 192 kHz (24 bit, 2-channel PCM)
2.8224 MHz (1 bit 2-channel DSD)
n Capability to carry the SA-CD signal as well as conven-
tional digital audio formats such as CD, MD, CD-R, etc. n Transfer rate: 1923 Mbps (logical limit) n Transfer signal format: Low Voltage Differential
Signaling (LVDS) TIA/EIA-644 n Send/receive clock fully synchronized n Full bidirectional capability with simultaneous send/receive n Full security capability with send/receive verifi cation n Cable type: Shielded twisted pair 8-conductor OFC cable
(equivalent to TIA/EIA-568A CAT.5)
HS-Link cable (supplied with DP-800)
n DP-800 and DC-801 connected
with HS-Link cable
HS-Link block diagram
The D/A converter that forms part of the MDSD type moving-average fi lter circuit is an MDS++ D/A
converter with an amazing eight circuits operating in parallel, ensuring the utmost in accuracy and sound
quality.
MDS (Multiple Delta Sigma) is an innovative approach that employs several delta sigma type converters
in a parallel confi guration for greatly improved accuracy. Combining the output signal from individual
converters causes mutual cancellation of conversion errors, resulting in a notable improvement in all
relevant aspects of conversion performance: accuracy, S/N ratio, dynamic range, linearity, and THD.
MDS++ D/A Converter with eight circuits operating in parallel Signal
Conversion error
Digital
input
(Signal)
(Conversion
error)
MDS output Note the ratio between signal
and conversion error. In the
MDS output, the error is very
small in relation to the signal.
n MDS type D/A converter principle
n Eight delta sigma converters
n Block diagram of MDS++ principle
8 DACs driven in
parallelCurrent summingVoltage
summing
(Normal phase output)
(Reverse phase output)
I (Current) - V (Voltage) converter
SubtractionDAC output
Ultra Jitter-Free + PLL circuit
-Direct Balanced Filter- circuit
Preamble
detector
Phase
compa-
ratorLoop
fi lter
Divider
Preamble signal
pulse distortion
removed DAI signal input
Master clock output
Optimized
clock divi-
sion ratio
The operation of the D/A
converter must be synchro-
nized with the digital input
signal. For this purpose, a
phase-locked loop (PLL)
circuit is used to extract the
master clock which is used
as system reference. In the
DC-801, this important task
is handled by a further im-
proved circuit called Ultra
Jitter-Free + PLL.
The output of any D/A converter contains so-called aliasing noise in the very high frequen-
cy range. An analog fi lter designed to remove that noise is therefore always required. The
fi lter circuitry in the DC-801 uses 5-pole Butterworth analog fi lters with extremely fl at fre-
quency response in the passband. In order to prevent unwanted interaction, the low-pass
fi lter confi guration is completely separate for the balanced and unbalanced signal paths.
n Front panel
n Front panel n Rear panel
n Rear panel SA-CD/CD indicator
Track display
Index display
Time display
Repeat indicator
REPEAT / 1 / A-B
Program indicator
Power switch
SA-CD/CD button
MODE button
ENTER buttonDisc tray
Disc tray open/close button
Play button
Pause button
Track search buttons
BACK, NEXT
Stop button
Digital output connectors
HS-LINK (SA-CD/CD signal)
COAXIAL (CD signal only)
AC power connector
+
Alphanumeric input display
Function indicators
LOCK, MDSD, EXT DSP
Output level display
Power switch
Input selector buttons
OPTICAL 1, 2, COAXIAL 1, 2, 3
BALANCED, HS-LINK
Output level control buttons
DOWN, UP
EXT DSP button
Digital input connectors
HS-LINK, BALANCED
COAXIAL 1, 2, 3, OPTICAL 1, 2
Analog output connectors
UNBALANCED, BALANCED
EXTERNAL DSP connectors
INPUTS (HS-LINK, COAXIAL)
OUTPUTS (HS-LINK, COAXIAL)
DIGITAL output connectors
COAXIAL, OPTICAL
AC power connector
+
Remarks + This product is available in versions for 120/230 V AC. Make sure that the voltage shown on the rear panel matches the AC line voltage in your area. + The shape of the AC inlet and plug of the supplied power cord depends on the voltage rating and destination country.
m Compatible disc formats 2-channel SA-CD
CD
m Data read principle Non-contact optical pickup
m Laser diode wavelength SA-CD: 650 nm
CD: 780 nm
m Digital outputs
HS-Link Connector type: RJ-45
Suitable cable: Dedicated HS-Link
cable
COAXIAL Format: IEC 60958
m Power requirements AC120 V/230 V (Voltage as
indicated on rear panel)
50/60 Hz
m Power consumption 18 W
m Maximum Dimensions
Width 477 mm (18-5/16")
Height 156 mm (5-7/8")
Depth 394 mm (15-5/8")
m Mass 26.6 kg (58.6 lbs) net
32.0 kg (70.5 lbs) in shipping carton Supplied with DP-800m AC power cordm HS-Link cable (HDL-15)m Remote Commander RC-100m Cleaning cloth
Supplied with DC-801m AC power cordm Audio cable with plugs (1 meter)m Cleaning cloth
m Digital inputs
HS-Link Connector type: RJ-45
Suitable cable:
Dedicated HS-Link cable
COAXIAL Format: IEC 60958
OPTICAL Format: JEITA CP-1212
BALANCED Digital balanced cable: characteristic imped-
ance 110 ohms
Sampling frequencies 32 kHz, 44.1 kHz, 48 kHz,
88.2 kHz, 96 kHz
(16 to 24 bit, 2-channel PCM)
HS-Link only 176.4 kHz, 192 kHz (16 to 24 bit,
2-channel PCM)
2.8224 MHz (1 bit 2-channel DSD)
m Digital outputs
COAXIAL Format: IEC 60958
OPTICAL Format: JEITA CP-1212
m D/A converter MDSD principle (DSD signal)
MDS++ principle (PCM signal)
m Frequency response 0.5-50,000 Hz +0, -3 dB
m Total harmonic distortion
0.0006% (20 to 20,000 Hz)
Optional cablesm HS-Link cable HDL-15 (1.5 m)
> 3 m, 5 m, 7.5 m, 10 m also available
m Signal-to-noise ratio 117 dB
m Dynamic range 117 dB (24-bit input, low-pass fi lter off)
m Channel separation 113 dB (20 to 20,000 Hz)
m Output voltage and impedance
BALANCED 2.5 V 50 ohms, balanced XLR type
UNBALANCED 2.5 V 50 ohms, RCA phono jack
m Output level control
0 dB to -80 dB (digital)
m Power requirements
AC120 V/230 V (Voltage as indicated
on rear panel)
50/60 Hz
m Power consumption 22 W
m Maximum Dimensions
Width 477 mm (18-5/16")
Height 156 mm (5-7/8")
Depth 393 mm (15-1/2")
m Mass 22.3 kg (49.2 lbs) net
28.0 kg (61.7 lbs) in shipping carton
DP-800 Guaranteed Specifi cations
DC-801 Guaranteed Specifi cations
[Guaranteed specifi cations are measured according to JEITA standard CP-2402A)
m Specifi cations and design subject to change without notice for improvements.
http://www.accuphase.com
L0605Y PRINTED IN JAPAN 851-0162-00 (AD1)
HS-Link: High Speed Link
DP-800DC-801
+
+
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PRECISION SA-CD TRANSPORT
Newly developed high-rigidity, high-precision SA-CD/CD drive
Dedicated digital-output SA-CD/CD transport - 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 fi 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 fl 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 infl 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 -Traverse Mechanism- with fl 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 -Advanced High Carbon- 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
Traverse mechanism
Disc tray
Mechanism base
Viscous dampers
-Advanced High Carbon-
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-
end audio.
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-s 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) - Controls DP-800 functions such as direct play, program play, repeat, etc.
- Controls DC-801 functions such as input switching and output level adjustment Both DP-800 and DC-801 feature massive cabinets made of persim-
mons wood
Digital signal processing assembly
Power supply assembly
HS-Link connector and coaxial output assembly
Block diagram of DP-800
