m High-grade SA-CD/CD drive m Innovative MDSD digital signal
processing m MDS++ type D/A converter using six parallel
devices m “Direct Balanced Filter” with totally separate balanced
and unbalanced signal paths m HS-Link digital interface m Transport
outputs and digital inputs allow insertion of DG-48 into signal path forsound field correction m Balanced and unbalanced analog outputs

High-end integrated SA-CD/CD player — High-grade SA-CD/CD
drive combined with exquisite disc tray and ultra-quiet disc loadingmechanism ensures smooth operation. Innovative MDSD (Multiple
Double Speed DSD) digital signal processing circuitry is configured
as moving average filter for straight D/A conversion. Completely
separate configuration of transport and processor sections, eachequipped with a set of HS-Link, coaxial, and optical connectors.
The reference-level separate-type combo DP-800/
DC-801 and the integrated DP-700 with their exclusive
mechanism developed in-house by Accuphase havegarnered high praise and acclaim the world over. The
new DP-600 is positioned as a companion model to theDP-700, benefiting from its sophisticated know-how,but it is also a high-end integrated SA-CD player in its
own right. Extensive listening tests were conductedto ensure optimum reproduction quality. As with all
Accuphase players so far, a conscious decision wasmade not to support multi-channel formats but rather
focus on obtaining the ultimate in musical fidelity fromtwo-channel SA-CD music sources.
The high-grade SA-CD drive mechanism in theDP-600 is the ultimate tool for extracting theinformation on SA-CD discs one hundred percent. It
not only keeps internal vibrations of rotating parts toa minimum, but is also highly impervious to externalvibrations. This ensures that the digital signal remains
in a highly pure and accurate state. A dedicated DSP
chip controls the digital servo, allowing the digital
signal encoded on the SA-CD in DSD (Direct StreamDigital) format to be processed with utmost accuracy.
The high-speed access mechanism with its singlelens/twin laser diode combines optimum precision
with lightning-swift operation.
In the digital processor section, ground-breaking
MDSD (Multiple Double Speed DSD) technology
is used, with an ultra-high-speed FPGA (Field
Programmable Gate Array) and multiple DACs driven
in parallel to handle the delayed DSD signal. After D/Aconversion, summation of the multiple data results
in an ingenious moving-average filter circuit that
implements straight D/A conversion of the DSD signal.
An important characteristic of MDSD is the use ofMDS++ D/A converters which keep conversion errors
to an absolute minimum. The MDSD circuit acts as ahigh-cut filter that virtually eliminates high-frequency
quantization noise.

Features and Functions of Transport Sectionn High-grade SA-CD/CD driveHighly rigid and precise construction with sturdy, heavyweight chassis to absorb external
vibrations“Traverse Mechanism” with floating design
Massive bridge coverNon-resonant design and low center of gravity further reduce vibrations
High-quality disc tray extruded
High-grade SA-CD/CD drivefrom an aluminum block, plus
super-quiet smooth disc loadingmechanism

ultra pure digital signal

n Single-lens/twin pickup highspeed access mechanism

CD
OpticalHeadRF
Signal
Processor

Motor&DriverDigital
ServoProcessorn Accuphase’s proprietary
digital audio interface HSLink (carries both SA-CD andCD signal)

Viscous dampers

DG-48 connection example
The DG-48 can be connected between the transport outputs and digital inputsof the DP-600 (using HS-Link, coaxial, or optical connection). This allows soundfield compensation of the signal from the CD transport in the digital domain.
HS-Link: Supports transmission of both SA-CD and CD signals
Coaxial/optical fiber: CD signals only

HS-Link cable

LVDS
Driver/Receiver

HS-Link

Digital Audio
Interface
Encoder

CoaxialTransmitter

Coaxial Transport

OpticalTransmitter

OpticalMaster
ControlComputer

Infrared
ReceiverKey
MatrixVolumeDelayUnbalanced

MDSD (Multiple Double Speed DSD) System
Delay

OpticalReceiverVolumeDelay
Up-sampler

DSD Signal
PCM Signal

DP-600 Block Diagram

LeftAnalog
Outputs

HS-Link is an ultra high-quality digital audio interface
developed by Accuphase using latest digital signaltransmission 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,
including 2.8224 MHz/1-bit and 192 kHz/24-bit signals.

DigitalAudioSignalHS-Link
Encoder

TIA/EIA-644
LVDS
Driver/Receiver

RJ-45
Connector
Security
Control

5-PoleButterworth
Low-Pass Filter

PCM Signal

Optical5-PoleButterworth
Low-Pass Filter

5-PoleButterworth
Low-Pass Filter

DSD Signal

Interface
Decoder

Outputs

D/A Conversion

Up-sampler

CoaxialReceiver

HS-Link: High Speed Link

Display

Delay

Digital Coaxial
InputsAccuphase Exclusive Digital Interface

Clock
Generator

MDSD (Multiple Double Speed DSD) System

HS-Link
Decoder

Mechanism
base

Disc tray

From
Remote Commander

HS-LinkTraversemechanismn Support for text data display

DigitalSignalProcessor

SA-CD
OpticalHeadBridgen SA-CD/CD transport outputs

TIA/EIA-568A CAT.5
STRAIGHT CABLE

Balanced

5-PoleButterworth
Low-Pass Filter

HS-Link
Decoder

Unbalanced

D/A Conversion

RightAnalog
Outputs

5-PoleButterworth
Low-Pass Filter

5-PoleButterworth
Low-Pass Filter

RJ-45
Connector
Security
Control
TIA/EIA-644
LVDS
Driver/Receiver

Balanced

HS-Link Block Diagram

Digital
Audio
SignalInnovative Digital Signal Processing: MDSD (Multiple Double Speed DSD)

2.822 MHz/1-bit“Moving-Average Filter” Circuit

5.6448 MHz/1-bit

MDS++ D/A Conversion System5.6448 MHz/1-bit

Normal Phase
OutputDigital Input
Upsampler×2

DSD signal

I (Current) - V (Voltage)
Converter

VolumeDelayDevice

Delayed by1 clock cycle

Reverse Phase
OutputDigital volume processing
mReduces noise during volume processingm Shifts the effective filter frequency upwards

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/A conversion
using a highly ingenious moving-average filter principle.
In the DP-600, this involves five delay devices and sixMDS++ type D/A converters. The signal is delayed (shifted)
progressively by one clock cycle to produce six signals which
are sent to separate D/A converters for direct D/A conversion.
The converted signals are then summed.
Since conversion errors are kept to an absolute minimumby the use of MDS++ type DACs, the MDSD principle
results in a 6-pole high-cut filter with perfectly linear phasecharacteristics.

Delay
DeviceDelay
DeviceDAC output

Delay
DeviceDelay
DeviceCurrent
Summing

Voltage
Summing

Analog output (dB)n Supplied remote commanderRC-100
Gives access to various functions
including direct play, repeat, program play, input switching,and level control.
Digital Input (dB)Linearity(Digital input vs. analog output)

Direct Balanced Filter With
Separate Balanced/Unbalanced Circuitry

Features and Functions of Digital Processor Sectionn MDSD (Multiple Double Speed DSD) implements innovative digital
signal processing.

n MDS++ D/A converter with six DACs driven in paralleln Digital level control allows adjustment down to –80 dB.
n Separate transport and processor sections, with digital input and output
connectors for HS-Link, coaxial, and optical connections.

n Power-on play feature allows automatic playback.
n Balanced and unbalanced analog outputs (1 set each)n Side panels with elegant persimmons wood finishn “High Carbon” cast iron insulator feet with superior

Delta-sigma type D/A converter

damping characteristics further enhance sound quality

n Assembly with six MDS++

D/A converters, 5-poleanalog filter, balanced/
unbalanced analog output
circuitry, power supply
c i r c u i t r y, e t c .

The output of any D/A converter contains so-called
aliasing noise in the very high frequency range.
During CD playback, an analog filter designed toremove that noise is therefore always required.
The filter circuitry in the DP-600 uses 5-pole Butterworth
analog filters with extremely flat frequency response in
the passband. In order to prevent unwanted interaction,completely separate filters are provided for the balanced
and unbalanced signal paths. A direct connection from thebalancing circuit at the output of the D/A converter to the filter
circuitry and symmetrical +/- configuration ensures that the+/- output impedance is also identical. This provides idealtransmission conditions for the high-quality MDS++ output.

Transport outputs/digital inputs assembly

DigitalInputs

D/A conversion
System5-PoleButterworth
LPF

Unbalanced
AnalogOutputs

5-PoleButterworth
LPF

5-PoleButterworth
LPF

Balanced

High-quality parts

DP-600 Guaranteed Specifications

n Front Panel* Guaranteed specifications are measured according to the JEITA standard CP-2402A.
* Measurement disc: PHILIPS 3122-783-00632

Transport section
m Compatible disc formats

m Data read principlem Laser diode wavelengthm Transport section outputs

2-channel Super Audio CD
CDNon-contact optical pickup
SA-CD:
650 nmCD:
780 nmHS-LINK Connector type: RJ-45
Suitable cable: Dedicated HS-Link cable
COAXIAL Format:
IEC 60958 compliant
JEITA CP-1212 compliant
OPTICAL Format:

Digital processor sectionm Digital inputs

n Rear Panel

Input indicator:
TRANSPORT/
HS-LINK/COAXIAL/OPTICAL

Track number indicator
Index indicatorTime indicator
Output level indicator
Repeat indicator
Program indicator
Power switch
SA-CD/CD selector button
Input selector button
Disc tray
Disc tray open/close button
Play button
Pause buttonBACK, NEXT track search buttons
STOP button
Digital inputs (HS-LINK, COAXIAL, OPTICAL)
Transport outputs (HS-LINK, COAXIAL, OPTICAL)
Analog outputs
Balanced output connectors
Ground Inverted (–) Non-inverted (+)
Unbalanced output connectors
AC power connectorn Supplied accessories:m AC power cordm Audio cable with plugs (1 meter)m Remote Commander RC-100
m Cleaning cloth

HS-LINKConnector type: RJ-45
Suitable cable: Dedicated HS-Link cable
COAXIAL Format:
IEC 60958 compliant
JEITA CP-1212 compliant
OPTICAL Format:
Sampling frequency32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz(16 to 24 bits, 2-channel PCM)
Only via HS-Link
176.4 kHz, 192 kHz (24 bits, 2-channel PCM)
2.8224 MHz (1 bit, 2-channel DSD)m D/A converter
MDSD principle (DSD signal)
MDS++ principle (PCM signal)m Frequency response
0.7 - 50,000 Hz + 0 , –3.0 dB
m Total harmonic distortion + noise 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 50 ohms, balanced XLR type
UNBALANCED: 2.5 V 50 ohms, RCA phono jacks
m Output level control
0.0 dB to –80.0 dB (digital)

Generalm Power requirements

AC120 V/230 V (Voltage as indicated on rear panel)
50/60 Hzm Power consumption
30 W
m Max. dimensions
Width
465 mm (18-5/16")
Height
150 mm (5-7/8")
Depth
393 mm (15-1/2")
m Mass18.5 kg (40.8 lbs) net
25.0 kg (55.1 lbs) in shipping carton
m Supplied Remote Commander RC-100
Remote control principle: Infrared pulse
Power supply:
Two IEC R03 (size AAA) batteries
Max. dimensions:
56 mm x 175 mm x 26 mm
Mass:
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.

mSpecifications and design subject to change without notice for improvements.

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