m High-grade playback not only of SA-CDs but also of conventional
CDs m Single lens/twin pickup high-speed access mechanism
m Digital processor ready for 2.8224 MHz/1-bit and 192 kHz/24-bit
source formats m MDS++ D/A converter achieves minimal distortionand outstanding S/N ratio m Transport section outputs and digital
inputs m HS-Link input/output capability via option boards

An SA-CD/CD player of the highest order – Processor section supports highquality formats such as 2.8224 MHz/1-bit and 192 kHz/24-bit. Further improved
MDS++ D/A converter. Transport section features dedicated DSP for digital
servo and single lens/twin pickup high-speed access mechanism. Separate
construction of transport and processor sections and respective connectors allow
independent use. HS-Link input/output boards available as option.
The Accuphase separate type player combo DP-100 and
DC-101 incorporating HS-Link connectivity is recognizedboth in Japan and overseas as the ultimate setup for
SA-CD playback. It is the standard against which all others
have to be measured. And now, the superior technologicalknow-how gained through the development of this combohas found another manifestation in the integrated SA-CD/CD player DP-78. Incorporating the latest advances indigital technology, the DP-78 is destined to take its placeat the top of its class. By concentrating solely on twochannel sources both in the SA-CD and CD format, theDP-78 lets you fully enjoy the best that orthodox music
reproduction has to offer.

SA-CD/CD Transport Section Features and Functionsn Digital servo with dedicated DSP assures highly accurate signal pickup for SA-CDs and CDs
n Plays also regular CDs with outstanding qualityn Single lens/twin pickup mechanism minimizes access timen Support for text data display including disc title and artist name informationn Strong, precision-machined chassis with resonance and vibration resistant constructionn SA-CD/CD transport output via optional HS-Link Output Board DO2-HS1 (see connection examplebelow)
n “High Carbon” cast iron insulator feet withsuperior damping characteristics further
enhance sound qualityn Multi-function remote commander
RC-100 supplied as standard equipment

Ever since its introduction in 1999, the SA-CD catalog ofhybrid discs has been expanding. With its 2.8224 MHz/
1-bit format, the SA-CD stores four times as muchinformation as a conventional CD at 44.1 kHz/16-bit. This
allows it to realize dramatically superior physicalperformance as manifested by wider frequency responseand dynamic range. The DP-78 is equipped to make fulluse of this impressive potential. It will let you rediscover
the deep joy and satisfaction that a truly outstanding
musical experience can offer. But the DP-78 not only
handles the SA-CD format with impeccable finesse, it willbring out the best from conventional CD sources as well.
Be prepared for a wholly new encounter with your entire
musical catalog.

n Dedicated coaxial and optical connectors
for CD signal output` Assembly with masterclock generator, DAI
encoder/decoder, ultra jitter-free PLL circuit, and other digital
signal processing circuitry
Transport section outputs

Connection example for effective use of SA-CD/CD transport
DP-78

The SA-CD/CD transport section and the processor
section of the DP-78 are kept entirely independent of eachother, to achieve optimum performance in each regard.
The transport features a single lens/twin pickup high-speed
access mechanism, combined with a digital servo
controlled by its own DSP. This advanced approachassures highly accurate processing of the digital signaland excellent support for high-sampling-frequency sources
including 2.8224 MHz/1-bit and 192 kHz/24-bit. The
DAC – a key component for determining sound quality –incorporates a further refined version of the acclaimed
MDS principle, called MDS++. As a result of this non-holdsbarred approach, the DP-78 projects a sound stage of
unprecedented realism and sheer musical perfection.

SA-CD
OpticalHeadDigital connection for multi-amped system
Using HS-Link, it is possible to keep the connection of DP-78 
DC-330  DF-45 entirely in the digital domain until directly before
the power amplifier. The various components are connected with
HS-Link cable.

DO2-HS1
installed
HS-Link cable

DF-45
DC-330HS-Link cable

DI2-HS1
installed

SA-CD /CD

Motor&Driver

DigitalServo
Processor

Low

DO2-HS1 installed in
OUTPUTS slot

Power amplifier

CP-1201
Encoder

CoaxialCP-1201
DriverTransport
Outputs×2
RF
Signal
Processor

Clock
Generator

DSPKeyMatrixMaster
ControlComputer

Optical

Display

HS-Link is an ultra high-quality digital audio interface developed byAccuphase using the 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 signals using advanced digital audio formats
such as 2.8224 MHz/1-bit or 192 kHz/24-bit. Because digital audio
data are transmitted with utmost fidelity, the sound quality achievedby HS-Link is outstanding.

InfraredReceiverMDS++
D/A Conversion SystemUltra
Jitter-FreePLLCoaxialDigitalInputs

Power amplifierAccuphase Original Digital Interface
HS-Link: High Speed Link

DigitalSignal
Processor

CD
OpticalHeadHigh

Analog output(2-way configuration)

For 5-way configuration andhigher: to additional DF-45

DAC×6Digital
Audio
SignalUnbalanced

HS-Link
Encoder

TIA/EIA-644
LVDS
Driver/ReceiverLeft
AnalogOutputs

Linear Phase
Low-Pass
FilterBufferBalanced

RJ-45
Connector
Security
Control
TIA/EIA-568A CAT.5
STRAIGHT CABLE

Interface
Decoder

OpticalMDS++
D/A Conversion System
Option 1Option
Slots

DAC×6

Unbalanced

Right
AnalogOutputs

Linear Phase
Low-Pass
FilterBufferBalancedHS-LinkDecoder
RJ-45
Connector

Option 2Security
Control
TIA/EIA-644
LVDS
Driver/Receiver

HS-Link Block Diagram
DP-78 Block Diagram

DigitalAudioSignal

Further Refined MDS++ D/A Converter
The output signal is produced by an MDS++ Type D/A converter which

The DP-78 uses six Analog Devices AD1955 delta sigma converters

boasts ultimate performance and impeccable sound quality. MDS

in parallel, which affords an overall performance improvement by a(Multiple Delta Sigma) is a revolutionary design which employs several

factor of 2.4 (√6).

delta sigma type converters in a parallel configuration for greatly

The MDS++ type converter in the DP-78 (block diagram shown below)

improved accuracy.

features improved operation of the I-V (current-to-voltage) circuit andAs is evident from the illustration, combining the output signal fromuses a combination of current adding and voltage adding, to reduce

individual converters causes mutual cancellation of conversion errors,

the load on the current adder. This results in better stability and further

resulting in a notable improvement in all relevant aspects of conversion

improved performance. Music emerges from a totally silent backgroundperformance: accuracy, S/N ratio, dynamic range, linearity, and THD.

and is reproduced with incredibly accurate spatial imaging.

Delta sigma type D/A converter

SignalDAC#1Digitalinput(Normal phase output)

DAC 1
Analog Output

e1

DAC
#2

I (current)/V (voltage)
converter

Note the ratio between signal
Conversion error and conversion error. In theMDS output, the error is very
S1small in relation to the signal.

S2(Reverse phase output)

LINEARITY[dB]0S0 (Signal)e2

DAC 2–10–20–30

DAC 3

–40
–50–60

DAC
#n-1

e0

Sn-1

(Conversionerror)–90

DAC 4–110

Subtraction(Reverse phase output)–120

SnDAC 5–130

MDS output

enn MDS type
D/A converter
principle(Normal phase output)

–80
–100

en-1

DAC
#n–70

–140–140

Other Functions and Features
–120

–100

–90

–80

–70

–50

–40 –30–20Linearity(Digital input vs. analog output)–100 [dB]
Digital Input

DAC 6Current adder

Voltage addern Block diagram of MDS++ convertern Supplied remote commander RC-100
Functions include input switching, output
level adjustment, direct play, repeat,program, shuffle, etc.

DAC output

Digital Processor Section Features and Functions

Option board type

The processor section incorporates the MDS++ D/A converter developed byAccuphase, assuring optimum performance and sound quality. The performanceof the processor can be accessed also by external components, for digital
signal reproduction of the highest standard.

The DP-78 allows separate use of its SA-CD/CD transport section and digitalprocessor section, for connection to other digital components. Besides the digital
input and output provided as standard equipment, there are also two option board
slots on the rear panel which accept various kinds of boards.
✻ For copyright reasons, the SA-CD signal does not appear at any other output
except HS-Link and can therefore not be recorded digitally.

n Digital processor supports new generation formats
with high sampling rates such as 2.8224 MHz/1-bit
and 192 kHz/24-bit.
n MDS++ type D/A converter achieves stunning
performance and sound quality.
n Ultra jitter-free PLL circuit topology totally eliminates
adverse influences from jitter and pulse distortion.

Digital demodulator ICn Fully separate processor section with coaxial andoptical digital inputs that support sampling
frequencies up to 96 kHz and 24-bit resolution.
HS-Link input board is available as an option.
n Digital level control with adjustment range of 0 dB to–60 dB.

DI2-HS1

DO2-HS1Option board type
Digital input connectors

Digital Input/Output Board
HPC Coaxial (ST) Input/Output Board
AES/EBU Input/Output Board
HS-Link Output Board
HS-Link Input Boardn Third-order linear phaseanalog filters ensure excellent phase characteristics.
n Balanced and unbalanced
analog outputs.
Analog output connectors

DIO-OC1
DIO-ST1
DIO-PRO1
DO2-HS1
DI2-HS1n HS-Link cable HDL-15 (1.5 m)(The HDL-15 is also available in 3 m, 5 m, 7.5 m, and 10 m lengths.)n Front panel

Guaranteed Specifications[Guaranteed specifications measured according to JEITA standard CP-2402][Measurement disc: PHILIPS 3122-783-00632]

Transport Section
m Compatible disc formats

2-channel Super Audio CDCD

m Data read principle

Non-contact optical pickup

m Laser diode wavelength

SA-CD:
CD:650 nm
780 nmm Transport outputs

Format:COAXIAL:OPTICAL:JEITA CP-1201 compliant
0.5 Vp-p, 75 ohms
–21 to –15 dBm, wavelength 660 nm

Digital Processor Sectionm Digital inputs

COAXIAL Format: JEITA CP-1201/AES-3 compliant
OPTICAL Format: JEITA CP-1201 compliant
Sampling frequencies
32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz(16 to 24-bits, 2-channel PCM)
[Implemented by option board]
176.4 kHz, 192 kHz (24-bits, 2-channel PCM)
2.8224 MHz (1-bit 2-channel DSD)m D/A converter

MDS++ type, 24-bits

n Rear panel
Option board
expansion slots

m Frequency response

0.5 - 50,000 Hz +0, –3 dB

m Total harmonic distortion

0.0008% (20 to 20,000 Hz)

m Signal-to-noise ratio

114 dBm Dynamic range

110 dB (24-bit input, low-pass filter off)m Channel separation

108 dB (20 to 20,000 Hz)

m Output voltage and impedance BALANCED:UNBALANCED:
m Output level control★

A Track/index indicator
B Time indicatorC Output level indicator
D Track search knob
E Input selector
F Power switch
G Disc tray
H Disc tray open/close button

I Play button
J Pause button
K Stop buttonL SA-CD/CD selector button
M Analog output connectors (unbalanced/balanced)
N Digital input connectors (coaxial, optical)
O Transport output connectors (coaxial, optical)
P AC inlet★

2.5 V at 50 ohms, balanced XLR type
2.5 V at 50 ohms, RCA phono jack

0 to –60 dB, 1-dB steps (digital)

Generalm Power requirements

AC 120 V /230V (voltage as indicated on rear panel)
50/60 Hzm Power consumption

25 W

m Maximum dimensions

WidthHeightDepthm Mass

18.4 kg (40.6 lbs) net
24.0 kg (53.0 lbs) in shipping carton

465 mm (18-5/16”)
150 mm (5-7/8”)
397 mm (15-5/8”)

m Supplied Remote Commander RC-100
Remote control principle:
Power supply:
Max. dimensions:Mass:infrared pulse
Two IEC R03 (size AAA) batteries
56 mm × 175 mm × 26 mm
155 g (including batteries)

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.

n Supplied accessories:• AC power cord
• Remote commander RC-100• Audio cable with plugs (1 m)• Specifications and design subject to change without notice for improvements.

http://www.accuphase.com/J0511Y

PRINTED IN JAPAN 850-0149-00 (AD1)