Pure Audio Enters a New Realm . . .
Separate Type SA-CD/CD Player Combo
DP-800/DC-801 Redefines the Genre
The DP-800/DC-801 SA-CD/CD player enters the field as the designated successor to the DP-100/DC-101 model pair. The DP-800 is thetransport, featuring a newly developed, ultra-massive SA-CD/CD drive
designed for high rigidity and utmost precision. The DC-801 processor
boasts a totally new approach to digital signal handling called MDSD,
which enables straight D/A conversion of the DSD signal. Revolu-

tionary Accuphase technology paired with our famous dedication tosonic excellence finally brings out everything the SA-CD format has
to offer. The two components are connected via HS-Link cable, using
Accuphase’s exclusive high-quality digital interface HS-Link. Connecting a DG-38 for sound field processing in the digital domain is also
possible.

DP-800/DC-801 connectionm Digital-only SA-CD/CD transport m High-rigidity, high-precision SA-CD/CD
drive m Digital processor with revolutionary SA-CD reproduction technology
MDSD m Accuphase original digital interface: HS-Link m MDS++ D/A converterwith eight DACs driven in parallel m “Ultra Jitter-Free +” PLL circuit m “Direct
Balanced Filter” with totally separate balanced and unbalanced signal paths

Digital recording/playback with DC-801

A single HS-Link cable carries
both the SA-CD and CD signal.

CD transport or otherdigital component

A digital recorder can be connected for recording/playback ofsources other than SA-CD

Coaxial cable Optical fiber cablem Connection is possible to any com-

HS-Link cableponent with a built-in HS-Link inter㩷 option board,
face or an HS-Link
such as DP-100, DC-101, DC-330,
DP-85, DP-78 etc.

Coaxial cable

Analogoutput
Audio
cable

Coaxial cablem The SA-CD/CD signal supplied via HS-Link
does not appear at the DIGITAL OUTPUTS
and therefore cannot be recorded digitally.
To record the CD signal from the DP-800
digitally, use a coaxial connection.

Preamplifier

Optical fiber cable

Digital recorderSound field compensation with DG-38: analog connection examples
Connection example 1

DG-38 inserted in analog connection between preamplifier and power amplifier
Audio
cable

Audio
cable

Preamplifier

Power amplifier

HS-Link cableLine input board
Audio
cable

For balanced connections:
AI2-B1For unbalanced connections: AI2-U1

Line output board
For balanced connections:
AO2-B1For unbalanced connections: AO2-U1

AnalogoutputConnection example 2
Multi-channel system including DF-45

Sound field compensation with DG-38 in digital domain
Preamplifier
CD transport or otherdigital component

Audio
cable

Audio
cable

HS-Link cable

Coaxial cable Optical fiber cable
HS-Link cable

Connect DG-38 to EXTERNAL DSP
connectors of DC-801 and set EXT
DSP button to ON, to allow soundfield compensation of digital signal.

AnalogoutputLine input board
For balanced connections:
For unbalanced connections:

Analogoutput

Audio
cable

HS-Link cable

Preamplifierm Connect DC-801 and DG-38 with HS-Link
cable. The signal from all sources connected to the DIGITAL INPUTS of the DC-801
will be routed through the DG-38.
m If the DC-801 is connected to the DG-38 via
coaxial cable, the signal input via HS-Link
will not be routed through the DG-38.

AI2-B1
AI2-U1

Coaxial cable

Audio
cable

Audio
cable

Power amplifier (for high frequency range)

Power amplifier (for low frequency range)

DC-801

DP-800Accuphase Exclusive Digital Interface

HS-Link: High Speed Linkn Front paneln Front paneln Rear paneln Rear panel

HS-Link is an ultra high-quality digital audio interface developed by Accuphase using latest digital signal transmission technology. It supports send/receive verification for copyright protection. The LVDS (Low Voltage Differential Signaling) principle allows a single dedicated HS-Link cable to transmit all audio data with utmost fidelity.

n Capability to carry the SA-CD signal as well as conventional digital audio formats such as CD, MD, CD-R, etc.

n Transfer rate: 1923 Mbps (logical limit)n Transfer signal format: Low Voltage Differential

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)

Signaling (LVDS) TIA/EIA-644

n Send/receive clock fully synchronized
n Full bidirectional capability with simultaneous send/receiven Full security capability with send/receive verificationn Cable type: Shielded twisted pair 8-conductor OFC cable

HS-Link cable (supplied with DP-800)(equivalent to TIA/EIA-568A CAT.5)

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 button

HS-Link block diagramn DP-800 and DC-801 connectedwith HS-Link cable

MDS++ D/A Converter with eight circuits operating in parallel
The D/A converter that forms part of the MDSD type moving-average filter circuit is an MDS++ D/A
converter with an amazing eight circuits operating in parallel, ensuring the utmost in accuracy and soundquality.
MDS (Multiple Delta Sigma) is an innovative approach that employs several delta sigma type converters
in a parallel configuration 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.
SignalConversion error

Digitalinput(Normal phase output)

I (Current) - V (Voltage) converter

Note the ratio between signal
and conversion error. In the
MDS output, the error is verysmall in relation to the signal.

DP-800 Guaranteed Specifications
DAC output(Signal)Subtraction

m Compatible disc formats 2-channel SA-CDCD
m Data read principle

Non-contact optical pickup

m Laser diode wavelength

SA-CD: 650 nm
CD:
780 nmm Digital outputs
HS-Link Connector type:
Suitable cable:(Conversion
error)

COAXIAL Format:

MDS output

n MDS type D/A converter principlen Eight delta sigma converters

Ultra Jitter-Free + PLL circuit

Current summing

Voltagesummingn Block diagram of MDS++ principle“Direct Balanced Filter” circuit

AC120 V/230 V (Voltage as
indicated on rear panel)
50/60 Hzm 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")

DAI signal input

The operation of the D/Aconverter must be synchronized with the digital input
signal. For this purpose, aphase-locked loop (PLL)
circuit is used to extract themaster clock which is usedas system reference. In the
DC-801, this important task
is handled by a further improved circuit called Ultra
Jitter-Free + PLL.

Phase
comparator

Master clock output

The output of any D/A converter contains so-called aliasing noise in the very high frequency range. An analog filter designed to remove that noise is therefore always required. The
filter circuitry in the DC-801 uses 5-pole Butterworth analog filters with extremely flat frequency response in the passband. In order to prevent unwanted interaction, the low-passfilter configuration is completely separate for the balanced and unbalanced signal paths.

Loopfilter

DC-801 Guaranteed Specifications [Guaranteed specifications are measured according to JEITA standard CP-2402A)
m Digital inputs
HS-LinkConnector type:
RJ-45
Dedicated HS-Link cable
Suitable cable:
COAXIAL Format:
IEC 60958
OPTICAL
Format:JEITA CP-1212
BALANCED Digital balanced cable: characteristic impedance 110 ohms

RJ-45
Dedicated HS-Link
cable
IEC 60958

m Power requirements

m MassPreamble
detector

Digital input connectors
HS-LINK, BALANCEDCOAXIAL 1, 2, 3, OPTICAL 1, 2
Analog output connectors
UNBALANCED, BALANCEDEXTERNAL DSP connectors
INPUTS (HS-LINK, COAXIAL)OUTPUTS (HS-LINK, COAXIAL)DIGITAL output connectors
COAXIAL, OPTICALAC 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.

(Reverse phase output)

8 DACs driven inparallelAlphanumeric 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, UPEXT DSP button

Disc 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

26.6 kg (58.6 lbs) net
32.0 kg (70.5 lbs) in shipping carton

Sampling frequencies

HS-Link onlym Digital outputs
COAXIAL Format:
OPTICAL
Format:32 kHz, 44.1 kHz, 48 kHz,88.2 kHz, 96 kHz(16 to 24 bit, 2-channel PCM)
176.4 kHz, 192 kHz (16 to 24 bit,
2-channel PCM)
2.8224 MHz (1 bit 2-channel DSD)
IEC 60958
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 Signal-to-noise ratiom Dynamic range

117 dB117 dB (24-bit input, low-pass filter 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 jackm Output level control 0 dB to –80 dB (digital)m Power requirements
AC120 V/230 V (Voltage as indicatedon rear panel)
50/60 Hzm 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 Mass22.3 kg (49.2 lbs) net
28.0 kg (61.7 lbs) in shipping cartonm Total harmonic distortion 0.0006% (20 to 20,000 Hz)

Supplied with DP-800

Supplied with DC-801

Optional cables

m AC power cordm AC power cordm HS-Link cablem HS-Link cable (HDL-15)

m Audio cable with plugs (1 meter)m Remote Commander RC-100

m Cleaning cloth

HDL-15 (1.5 m)
3 m, 5 m, 7.5 m, 10 m also available

m Cleaning cloth

Divider

Optimized
clock division ratio

Preamble signal
pulse distortion
removedmSpecifications and design subject to change without notice for improvements.

http://www.accuphase.com

L0605YPRINTED IN JAPAN

851-0162-00 (AD1)

PRECISION SA-CD TRANSPORT

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 vibrations. Finely machined and utterly smooth disc loading mechanism with exquisitetray. High-performance digital audio interface HS-Link.

Newly developed high-rigidity, high-precision SA-CD/CD drive
In order to extract the minute bits of information from the rapidly
spinning disc and decode these accurately into a digital signal ofhigh purity, vibrations emanating from the rotating medium as wellas any external mechanical vibrations must be minimized. At thesame time, the prevention of resonances is also highly important.
In the DP-800, the SA-CD/CD drive is mounted firmly to a strong
aluminum frame, and the drive loading mechanism and mechanicalbase form a massive and highly rigid chassis constructed withutmost 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 floating 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 aluminumis 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 andaffords excellent protection against all kinds of adverse influencesfrom vibrations. Perfectly stable and quiet operation produces asignal of utmost accuracy.

High-rigidity, high-precision SA-CD/CD drive
Aluminum alloy bridge

Sturdy, heavyweight chassis absorbs external vibrations
Highly rigid and precise construction

Traverse mechanism“Traverse Mechanism” with floating design andviscous damping
Integrated construction with oversize heavyweight
aluminum alloy bridge mounted to mechanism
base

Disc tray

Low center of gravity further reduces vibrations
High-quality disc tray extruded from an aluminum
block, plus super-quiet smooth disc loading mechanism“Advanced High Carbon” cast iron insulators withexcellent absorption characteristics control vibrations to ensure high sound quality
Mechanism baseViscous dampers

For some time now, Accuphase engineers have been
engaged in an ambitious in-house development
project: to create the ultimate SA-CD drive. With theintroduction of the DP-800, this project has now come tofruition, 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 aswell as suppression of vibrations must be of a higher
order, to allow full access to the enormous amountof information stored on the disc. This in turn places
formidable requirements on the mechanical constructionof 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 SACD drive combines superior rigidity with rock-stableaccuracy. Truly a monumental event in the world of highend 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 reproductionof SA-CDs, it also is capable of extracting a superaccurate signal from conventional CDs. The output for
both SA-CD and CD is provided via the Accuphaseexclusive 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.

“Advanced High Carbon”
cast iron insulators for best sound quality

Block diagram of DP-800

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 conventional CD media
Single-lens/twin pickup high-speed accessmechanism
Support for text data display

Digital signal processing assembly

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 persimmons wood

HS-Link connector and coaxial output assemblyPower supply assembly

PRECISION MDSD DIGITAL PROCESSOR

Digital processor designed for ultimate SA-CD quality – Innovative digital signal
processing technology MDSD (Multiple Double Speed DSD). Moving-average filter circuit configured with delay and eight parallel converters achieves straight D/A conversion of DSD signal. Seven digital inputs for enhanced versatility.
MDSD (Multiple Double Speed DSD)

2.8224 MHz/1 bit“Moving-average filter” circuit

5.6448 MHz/1 bit
5.6448 MHz/1 bit

Normal phase output

Digital input

I (Current) - V (Voltage)
converter

DSD signal
Delayed by 1 clock cycle

Delay

Digital volume processing

The DC-801 showcases Accuphase’s mastery ofsophisticated digital technology and creative circuit
topology. It is a digital processor designed to realize
the ultimate in SA-CD reproduction.
A new technique called MDSD (Multiple Double
Speed DSD) allows straight D/A conversion of
the DSD signal. MDSD employs eight MDS++
type D/A converters operating in parallel toreduce conversion errors to an absolute minimum
while at the same acting as a high-cut filter thatremoves noise in the high-frequency range. The
Direct Balanced Filter is configured with entirely
separate balanced and unbalanced signal paths,
and a further refined “Ultra Jitter-Free +” PLL circuit
extracts the master clock for the D/A converter withabsolute precision. The overall result is music
reproduction that finally brings out the full sonicpotential of the SA-CD format.
For connectivity to various sources, the DC-801
offers a full complement of digital inputs: HSLink, balanced, coaxial (3 streams), and optical (2streams). This allows the music data to be supplied
to the processor without any degradation in quality.
Two sets of digital outputs (coaxial and optical)
let the user easily connect a digital recorder,
for recording of sources other than SA-CD. And
there’s even a set of EXTERNAL DSP input/output
connectors that allows using the Digital Voicing
Equalizer DG-38 for sound field processing in thedigital domain.

Delayz Reduces noise during volume processingz Shifts the effective filter frequency upwards

DC-801 Features and Functions

Delay

MDSD (Multiple Double Speed DSD) implements
innovative digital signal processing
MDS++ D/A converter with eight DACs driven inparallel
Ultra Jitter-Free + PLL circuit“Direct Balanced Filter” provides totally separate
analog low-pass filtering for balanced and unbalanced signal paths

Reverse phase output

Digital signal processing assembly

Digital level control allows adjustment down to–80 dBD/A converter printed circuit boards made from Teflon (glass fluorocarbon resin) with low dielectric
constant and low loss

The DSD signal from the input is upsampled by a factor of 2, resulting in a sampling frequency of 5.6448
MHz/1 bit.
After volume processing, the circuit performs D/Aconversion using a highly ingenious moving-averagefilter principle.
In the DC-801, this involves seven delay devices andeight MDS++ type D/A converters. The signal is delayed (shifted) progressively by one clock cycle toproduce eight signals which are sent to separate D/Aconverters for direct D/A conversion. The converted
signals are then summed.
Since conversion errors are kept to an absolute minimum by the use of MDS++ type DACs, the MDSD principle results in an 8-pole high-cut filter with perfectly
linear phase characteristics.

Delay

DAC output

Delay

Delay

Delay

Current summing

Voltage summing

Teflon is a registered trademark of DuPont USA.

EXTERNAL DSP input/output connectors allow insertion of DG-38 in signal path

Digital input assembly with HS-Link etc.

Seven digital inputs: HSLink, coaxial (3 streams),
optical (2 streams), balanced
Delta sigma type D/A converters

Coaxial and optical digital
outputs
Balanced and unbalanced
analog outputs (1 each)High-grade parts selected for sound quality

Power supply assembly

Block diagram of DC-801
FPGA: High-speed
logic device implementing upsampler, moving-average filter circuit,and other digital
signal processing
tasks

PCM

PCM

MDS++ D/A converters andanalog output circuitry on Teflonboards with low dielectric constant and low loss