m High-precision CD drive m High-quality CD tray and ultra quiet andsmooth loading mechanism m MDS++ D/A converters m Low-pass “DirectBalanced Filter” with totally separate line and balanced signal paths m Two
sets of transport outputs and digital inputs allow insertion of DG-48 into
signal path for sound field correction m Balanced output phase selector

Dedicated high-end CD Player designed for optimum sound quality — Highly
rigid, high-precision purpose-built CD drive. Processor section with MDS++
type D/A converter featuring six DACs driven in parallel. Fully separate
CD transport and processor section, with coaxial and optical transport outputs
and digital inputs. Coaxial input supports signals with up to 192 kHz sampling
frequency and 24-bit resolution.
The Compact Disc format with its long history offers an unsurpassed wealth of musicaltreasures. Many audiophiles want to get the best and most up-to-date reproduction of thisformat as possible. In response to such demands, Accuphase developed a CD drive inhouse and first incorporated it in the high-end dedicated CD player DP-500 which has won
enthusiastic praise the world over. The DP-510 is the successor to the DP-500, inheriting
its advanced know-how and further refining the capability to bring out all that the Compact
Disc format has to offer. Discover a world of musical excellence. Explore the finest nu-

CD transport section delivers highly pure digital signal
n High-precision dedicated CD drive.
1 Highly rigid construction with sturdy chassis

absorbs external vibrations.

2 “Traverse Mechanism” with floating designand viscous dampers.

3 Integrated design with large bridge coverances of recordings that will sound better than you have ever heard them before.
The CD mechanism in the DP-510 was developed with a simple yet demanding aim:
extract the information encoded on the CD one-hundred percent. Using all of its accumulated know-how and expertise of the DP-500 and taking it onto an even higher plane,
Accuphase has created an extremely rigid and ultra precise transport mechanism that at-joined to mechanism base.

4 Low center of gravity and efficient vibration

control.

5 High-quality CD tray made of extruded aluminum,plus quiet and smooth disc loading mechanism.

tains new levels of performance. The processor section employs six strictly selected high-n Fully digital control of CD mechanism.

performance delta-sigma devices operating in parallel, forming a further refined MDS++n Balanced drive circuitry for actuator control

D/A conversion system. The analog filter which has a significant influence on sound quality is a so-called “Direct Balanced Filter” which provides totally separate analog low-passfiltering for the balanced and line signal paths. This brings out the full musical potential of
the CD. The outstanding sound and high performance of the D/A converter section can beeliminates interaction with other circuits.

n Laser pickup with integrated RF amplifier for drasticallyreduced noise interference.

n Power-on play for automatic playback/Frame indication
feature.

accessed also by external equipment. Two sets of opticaln Bottom plate with triple sandwich construction (resin plateand coaxial digital inputs accept digital signals from othercomponents, for processing with the highest musical ac-

between two steel plates) completely blocks vibrations.

curacy. The coaxial input can handle audio data up to an “High Carbon” cast iron insulator feet with superior

sampling frequency of 192 kHz and 24-bit resolution.

Coaxial input
display example

Optical input
display example

damping characteristics further enhance sound quality.

DIGITAL SECTION

Focus Coil&Tracking CoilBridge

OpticalHeadRF
Signal
Processor

Spindle Motor

SpindleServoController

Sled Motor

Focus &
Tracking Servo
Controller

High-rigidity,
high-precision
dedicated CD drive

EFM Decoder& Error
Corrector

Traverse mechanism

ClockGenerator

Disc tray

CDDisc Clamp& Tray
MotorMaster
ControlComputer

DisplayDriver

KeyMatrix

InfraredReceiver

Mechanism base
DisplayFrom Remote Commander

Digital Audio
Interface
Encoder

Digital Audio
Interface
Decoder

CoaxialTransmitter

Coaxital

OpticalTransmitter

OpticalPulse Amp

Coaxital

TransportOutputs

OpticalReceiver

DigitalInputs

Viscous dampers

Digital audio interface
chip AK4118 drasticallyreduces jitter

OpticalANALOG SECTIONMDS++
D/A Conversion
System5-PoleLow-Pass Filter⊿Σ DAC

5-PoleLow-Pass Filter

LineLeft
AnalogOutputs
Balanced

5-PoleLow-Pass Filter

×6
MDS++
D/A Conversion
System5-PoleLow-Pass Filter⊿Σ DAC

5-PoleLow-Pass Filter

Circuit assembly with transport outputs,
digital inputs, MDS++ D/A converters,Direct Balanced Filter circuitry,line/balanced analog outputs, power supply etc.

LineRightAnalog
Outputs
Balanced×65-Pole
Low-Pass Filter

DP-510 Block Diagram

Digital signal processing assembly Electronic parts selected for high sound quality and reliability

■ Supplied remote commander
RC-100 provides access todirect play, repeat play, program
play, input source selection, levelcontrol, and other functions.

Further refined MDS++ D/A converter
MDS (Multiple Delta Sigma) is a revolutionary design which employs severaldelta sigma type converters in a parallel configuration. The same digital signal
is supplied to each converter. In the combined output of these multiple converters, the signal values are added up, but conversion errors cancel each other out,
resulting in lower values than by simple addition. The ratio between the signal
and conversion errors therefore increases significantly. Converter performanceis improved in all relevant aspects, such as accuracy, S/N ratio, dynamic range,linearity, and THD. Furthermore, the improvement afforded by the MDS principle
is independent of signal frequency and signal level. This means that noise components are eliminated even at extremely low levels, which is difficult to achievewith conventional designs.
In the DP-510, six delta sigma type PCM1796 converters (made by Texas Instruments) are driven in parallel. Compared to a single converter, this results in an
overall performance improvement by a factor of 2.45 (= 6 ).
The MDS++ also features
an enhanced current-tovoltage (I/V) converter
for processing the D/Aconverter output current.
A combination of current
Delta Sigma D/A converter
PCM1796
summing and voltage
summing is used, resulting in even better stability
and top-notch performance. The music emerges
from a totally silent background, with breathtaking
detail resolution and accurate spatial information.

Normal phase output

I (Current) / V (Voltage) converter

DAC 1I-V

Reverse phase output

Current
SourceDAC 2Digital input

DAC 3

I-V

DAC 4

I-V–+
Subtraction

DAC output

Current
Source

DAC 5
DAC 6I-V

6 circuits driven in parallel

Current summing

Voltage summing

Block Diagram of MDS++ Converter in DP-510
Analog output [dB][%]

00.1000–100.0500–200.0300
0.0200–30–400.0100–50

0.0050–60

0.00300.0020–70–80–900.0010–100

0.0005–1100.00030.00020.0001

–120
–130
20 30

50

100200500

1k

2k

3k

5k

10k

THD (+ Noise) vs. Frequency Response

20k
[Hz]

–140
–140

–120

–100 –90 –80 –70 –60 –50–40 –30 –20 –10 0
Digital input [dB]Linearity (Digital Input vs. Analog Output)

The transport and processor sections of the DP-510 are completely independent of each other. To enable stand-alone use, inputs (coaxialand optical) are provided for supplying the digital signal from other components. The outstanding D/A converter performance of the DP510 can be harnessed to extract the musical information contained in such digital signals with the utmost fidelity. The coaxial input evenaccepts S/PDIF data with a sampling frequency of up to 192 kHz and 24-bit resolution.
Playback example with external digital component

DG-48 connection example

Direct Balanced Filter with separate balanced/line circuitry

A high-quality musical source downloaded to an external digital component or acomputer can be supplied to the DP-510
via the S/PDIF output, for reproduction
with outstanding sound quality.

The DG-48 can be connected between thetransport output and the digital input of the DP510, for sound field processing of the CD transport signal in the digital domain.

The analog filter circuitry in the DP-510 that removes aliasing
noise in the very high frequency range employs 5-pole Butterworth analog filters with extremely flat frequency response inthe passband. In order to prevent unwanted interaction, completely separate low-pass filters (LPF) are provided for the balanced and line signal paths.

USB
Cable
S/PDIF Output

D/DConverter

DIGITAL OUT

DIGITAL IN5-Pole
Butterworth
LPF

MDS++
D/A Conversion
SystemDG-48
DigitalInput

AnalogOutputs
5-PoleButterworth
LPF

ComputerComputerConnection
ExampleCoaxial Digital Cable

Digital Inputs

Coaxial Digital Cable

5-PoleButterworth
LPF

×6

COAXIAL : up to 192 kHz/24 bit
OPTICAL : up to 96 kHz/24 bit

Digital Inputs

LineBalanced

Transport Outputs

Phase selector for balanced output

m In the factory default condition, the switch

Analog Outputs

Analog Outputs

is set to the left side (pin 3 positive).

m If the connected preamplifier or inteDP-510

DP-510Preamplifier

grated amplifier uses a “pin 2 positive”
arrangement, change the setting of theswitch.

Preamplifiern Front PanelAB

GUARANTEED SPECIFICATIONSCD[Guaranteed specifications are measured according to the JEITA standard CP-2402A.][Measurement disc: JEITA CP-2403A]

CD Transport
m Format:

EFH

G

IJ K L

Format:Standard CD format
Quantization:
16 bits
Sampling frequency:
44.1 kHz
Error correction principle: CIRC
Number of channels:
2Revolution speed:
500 – 200 rpm (CLV)
Scan velocity:
1.2 – 1.4 m/s, constantm Data read method
Non-contact optical pickup
m LaserGaAlAs (double hetero-junction visible-spectrum
semiconductor laser diode)m Transport output level COAXIAL (IEC 60958): 0.5 Vp-p, 75 ohms
OPTICAL (JEITA CP-1212):
Light output –21 to –15 dBm
Wavelength 660 nm

n Rear PanelProcessor
m Input format

MNO

A Play track indicator
B Total track / index indicator
C Time indicator
D Output level indicator
E Power switch
F CD transport / processor selector button
CD / COAXIAL / OPTICALG Disc tray
HDisc tray open / close button

PQ

R★

I Play button
J Pause button
K
BACK /NEXT track search buttons
LStop button
M Digital input connectors (coaxial, optical)
N Transport output connectors (coaxial, optical)
O Balanced output phase selector switch
P Balanced output connectors (analog)
Q Line output connectors (analog)
R AC power connector★

Remarks
This product is available in versions for 120/230 V AC. Make sure that the voltage shown on therear 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 anddestination country.

■ Supplied accessory:m(IEC 60958/AES-3 compliant)
Quantization: 16 – 24 bits, linear
Sampling frequencies:
COAXIAL : 32 kHz to 192 kHz
OPTICAL : 32 kHz to 96 kHz
m Digital input level
COAXIAL (IEC 60958): 0.5 Vp-p, 75 ohms
OPTICAL (JEITA CP-1212):
Light output –27 to –15 dBm
m Frequency response 4 to 20,000 Hz ±0.3 dB
m D/A converter
24 bits, 6MDS++ typem Total harmonic distortion (20–20,000 Hz, 24-bit input) Max. 0.001%
m Signal-to-noise ratio
114 dB or betterm Dynamic range
110 dB or better (24-bit input)
m Channel separation
110 dB or betterm Output voltage andBALANCED: 2.5 V into 50 ohms, balanced XLR typeimpedanceLINE:
2.5 V into 50 ohms, RCA-type phono jacks
m Output level control
0 to –60 dB in 1-dB steps (digital type)

Generalm Power requirementsm Power consumption
m Max. dimensions

m MassAC120 V/230 V, 50/60 Hz(Voltage as indicated on rear panel)
18 W
Width 465 mm (18-5/16")
Height 151 mm (5-15/16")
Depth 393 mm (15-1/2")
17.8 kg (39.2 lbs) net
24.0 kg (52.9 lbs) in shipping carton● AC power cord
● Audio cable with plugs (1 m)● Remote Commander RC-100

Specifications and design subject to change without notice for improvements.

http://www.accuphase.com

E1010YPRINTED IN JAPAN

850-0162-00 (B1)