m High-grade playback not only of SACDs but also ofconventional CDs m Single lens/twin pickup high-speed accessmechanism m Digital processor ready for 2.8224 MHz/1 bit and192 kHz/24-bit source formats m MDS Plus type D/A converterwith ultimate conversion precision m Transport section outputs
and digital inputs m HS-Link capability via option board

Rediscover what the Compact Disc is all about
Integrated SACD/CD
player with MDS Plus type D/A converter. Transport section features singlelens/twin pickup high-speed access mechanism. Processor handles latestformats such as 2.8224 MHz/1-bit and 192 kHz/24-bit. Separate constructionof transport and processor sections and respective connectors allow
independent use. HS-Link input/output board available as option.
The integrated SACD/CD player DP-77 isbased on the superior know-how gained
through the development of the separate typeplayer combo DP-100 and DC-101, using thelatest advances in digital technology. This
player lets you fully enjoy the wide frequency
range and amazing dynamics of the SACD
format. But the DP-77 also brings out hidden
musical qualities inherent in conventional CDs,
letting you hear even familiar recordings likeyou've never heard them before.
The transport section of the DP-77 features adedicated DSP for the digital servo circuitry,
assuring highly precise processing of the digital

SACD signal recorded according to the DSD
principle. The highly critical laser pickup section
features a single lens/twin pickup high-speed
access mechanism to achieve totally accurate
signal readout. The processor section uses
the latest in sophisticated digital technology toprovide support also for 2.8224 MHz/1-bit and192 kHz/24-bit sources. The D/A converter
section which has a crucial effect on soundquality employs the MDS Plus principle, withmultiple strictly selected Delta Sigma
converters in a parallel configuration, assuring
unprecedented conversion precision.
The SACD/CD transport section and theprocessor section of the DP-77 are kept
entirely independent of each other, to achieve
optimum performance in each regard. This
manifests itself in utterly authoritative sound.
Thanks to transport outputs and digitalprocessor inputs, the two sections can be used
separately as well.
An optional HS-Link Board is available for
combination with the DC-330/DP-100 or for
high-quality sound field compensation with theDG-28/DG-38, including wide-range sources.
Even multi-amping with the DF-35 is possible,
opening up a whole world of high-class audio
possibilities.

SACD/CD Transport Section Features and Functionsn Digital servo with dedicated DSP assures
highly accurate signal pickup for SACD andCD
n Plays also regular CDs with impressive qualityn Single lens/twin pickup mechanism minimizes access timen Strong, precision-machined chassis withresonanceandvibration
resistantconstructionn "High Carbon" cast iron insulator feet withsuperior damping characteristics further
enhance sound qualityn Multi-function remote commander RC-28
supplied as standard equipment

Connection examples for effective use of SACD/CD transport
The DP-77 provides output facilities of theSACD/CD transport section to allow flexible
combinations. By installing an HS-Link
option board, the unit can be used with aDC-330 for SACD/CD playback. From theDC-330, the digital signal can be further
routed to the Voicing Equalizer DG-28/
DG-38, the Channel Divider DF-35, etc.
This offers a host of possibilities forcreating a multi-amplified system entirelyin the digital domain.

n Optional HS-Link output board for SACD/CDtransport section

Connection to DC-300 for SACD/CD playback and digitalconnection to DG-28 for sound field compensation
Because DG-38 incorporates HS-Link,
direct connection with a HS-Link cable
is possible.
Coaxial digital
cable

HS-Link cable

Coaxial digital
cable

Analog output
DI2-HS1
installed

HS-Link Output Board DO2-HS1 installed in DP-77

Power amplifier

DIO2-DG1 installed in EXT DSP
slot (uses 2 slots)

Digital connection to DC-330, DF-35 for multi-amped systemn Dedicated coaxial and optical connector for
CD signal output

Using HS-Link, it is possible to keep the connection ofentirely inthe digital domain until directly before the power amplifier. The various components areconnected with HS-Link cable.
HS-Link cable

Power amplifier

HS-Link cable
For 5-way configuration andhigher: additional DF-35

Assembly with transport outputs and digital inputs (optical,coaxial)

DI2-HS1
installed

DO2-HS1 installed inOUTPUTS slot

Analog output (2-wayconfiguration)

Power amplifierDI2-HS1 installed~Accuphase Original Digital Interface~
HS-Link: High Speed Link
HS-Link is an ultra high-quality digital audio interface developedby Accuphase using latest digital signal transmission technology.
It supports send/receive verification for copyright protection. TheLVDS (Low Voltage Differential Signaling) principle allows a single
dedicated HS-Link cable to transmit signals using advanced digitalaudio formats such as 2.8224 MHz/1-bit or 192 kHz/24-bit. Because
digital audio data are transmitted with utmost fidelity, the soundquality achieved by HS-Link is simply outstanding.

DP-77 Block Diagram

HS-Link Block Diagram

n Supplied remotecommander RC-28
Functions include input
switching, output leveladjustment, direct play,repeat, program, shuffle,etc.

n Assembly with master clock generator,
DAI encoder/decoder, ultra jitter-free PLL
circuit, and other digital signal processing
circuits

Digital Processor Section Features and Functionsn Digital processor supports new generation formats withhigh sampling rates such as 2.8224 MHz/1-bit and
192 kHz/24-bit
n MDS Plus type D/A converter achieves stunning
performance and sound quality
n Ultra jitter-free PLL circuit topology totally eliminates
pulse distortionn Fully separate processor section with coaxial andoptical digital inputs
n Ultra high-speed digital coupler ensures effective
separation between digital and analog sectionsn Digital level control with adjustment range 0 dB to–60 dB
n Balanced and unbalanced analog outputs

Ultra Jitter-Free PLL Circuit
This original Accuphase development
employs a phase-locked loop (PLL)
circuit to extract a highly precise
master clock from the input signal to
be used as reference for D/Aconversion.
As shown in the diagram, the circuitconsists of a preamble detector anda voltage-controlled oscillator (VCO)
using a quartz crystal element. The
master clock produced by this PLL
circuit is totally free from the effectsof pulse distortion and jitter.

DAI input signal

Preamble
detector

Phase
comparator

Preamble signal(pulse distortion removed)LoopfilterFrequency
divider

Master clock
outputPrinciple of ultra jitter-free PLL circuit[MDS Plus Type] D/A Converter
MDS (Multiple Delta Sigma) is a revolutionary design
which employs several delta sigma type converters
in a parallel configuration.
In the combined output ofthese multiple converters,conversion errors cancel
each other out, resulting
in a drastic improvement
in all relevant aspects of
converter performance:
accuracy, S/N ratio,
dynamic range, linearity, THD, etc.
In the MDS Plus type converter employed in the
DP-77, this principle has been further refined byenhancing the current-to-voltage converter in thesignal adder section for even better stability andtop-notch performance.
The DP-77 uses four delta sigma converters inparallel, which results in an overall performance
improvement by a factor of 2 (= 4 )SignalConversion error

Digitalinput(Signal)(Conversionerror)
MDS output
Note the ratio of signal level vs. conversion
error level: in the MSD output, theconversion error is much smaller in relation
to the signal level.

MDS Plus type D/A converter principlen Assembly with MDS Plus D/A converter, analog
outputs, etc.

Option Boards

Example for analog connection of DP-77 and sound field compensation with DG-38

The DP-77 allows separate use of its SACD/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 SACD signal does not appear at any other output except HS-Link andcan therefore not be recorded digitally.

You can install option boards in the DG-38 and perform sound field compensation
for the analog signal from SACD/CD sources played in the DP-77.
* To use the DG-28 instead of the DG-38 is possible in the same way, by installing one of the WideRange Digital Input/Output Boards listed below.
n For unbalanced connection: AIO-DGU1n For balanced connection: AIO-DGB1

DG-38 connection example
m Line Input Board and Line Output Board installed in option board slotsof DG-38.
Example 1: DG-38 connected to TAPE jacks of preamplifier or integrated amplifier
Example 2: DG-38 connected between preamplifier and power amplifier

AI2-B1
installedOption board type
HPC Coaxial (BNC) Input Board
Digital Input/Output Board
HPC Coaxial (ST) Input Board
AES/EBU Input/Output Board
HS-Link Output Board
HS-Link Input Board

AO2-B1
installedPreamplifier

DI-BNC1
DIO-OC1
DIO-ST1
DIO-PRO1
DO2-HS1
DI2-HS1

Power amplifierLine Input Boards
n For unbalanced connection: AI2-U1 (1 slot)
n For balanced connection: AI2-B1 (2 slots)n Front panel

Line Output Boards
n For unbalanced connection: AO2-U1 (2 slots)n For balanced connection: AO2-B1 (2 slots)

Guaranteed Specifications[Guaranteed specifications measured according to EIAJ standard CP-2402]* Measurement disc: PHILIPS 3122-783-00632
Transport Sectionm Compatible disc formats

2-channel Super Audio CD
CDm Data read principle

Non-contact optical pickup

m Laser diode wavelength

SACD:
CD:

m Digital outputs

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

650 nm
780 nmDigital Processor Sectionn Rear panelm Digital inputs

COAXIAL Format: EIAJ CP-1201/AES-3 compliant
OPTICAL Format: EIAJ 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)

Option board
expansion slots

Supplied accessories:m AC power cordm Remote commander RC-28
m Audio cable with plugs (1 m)

24-bit MDS Plus converter
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: 2.5 V at 50 ohms, balanced XLR type
UNBALANCED: 2.5 V at 50 ohms, RCA phono jack0
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 buttonm D/A converterm Frequency responsem Output level control

I Play button
J Pause button
K Stop button
L SACD/CD selector button
M Analog output connectors (unbalanced/balanced)
N Digital input connectors (coaxial, optical)
O Transport output connectors (coaxial, optical)
P AC inlet0

Optional cablesm HS-Link cablem Toslink cablem HPC balanced cable

0 to –60 dB, 1-dB steps (digital)

Generalm Power requirements

AC 120 V/230 V, 50/60 Hz(Voltage as indicated on rear panel)m Power consumption

24 W

m Maximum dimensions

Width 475 mm (18-7/10")
Height 151 mm (5-15/16")
Depth 397 mm (15-5/8")

m Weight

17.7 kg (39.0 lbs) net
23.0 kg (51.0 lbs) in shipping carton

HDL-15 (1.5 m)
LG-10 (1 m)
HLC-10 (1 m)* The HDL-15 is also available in 3 m, 5 m, 7.5 m, and 10 m lengths.
* The LG-10 and HLC-10 are also available in 2 m, 3 m, and 5 m lengths.

Remarks
0 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.
0 The shape of the AC inlet and plug of the supplied power cord depends on the voltage rating and destination country.

• Specifications and design subject to change without notice for improvements.

http://www.accuphase.com/L0205Y PRINTED IN JAPAN 851-0130-00 (AD1)