Accuphase DP-550 Datasheet

Page 1

● High-grade SA-CD/CD drive ● MDS+ type D/A converter with four parallel devices ● Support for playback of DSD discs in DSF file format

● Direct Balanced Filter with separate line and balanced signal paths

● HS-LINK and USB digital interface ● Transport outputs and digital inputs

allow insertion of DG-48 into signal path for sound field correction ● Phase selector for balanced outputs ● Numeric indication of sampling frequency

Page 2

High-performance integrated SA-CD/CD player — Newly developed high-grade

SA-CD/CD drive combined with exquisite disc tray and ultra-quiet disc loading

mechanism ensures smooth operation. Innovative MDS+ type D/A converter

using four parallel DAC circuits achieves straight D/A conversion of DSD signal.

Separate configuration of transport and processor sections, each equipped with

a set of HS-LINK, coaxial, optical, and USB (input only) connectors.

On the occasion of the 40th anniversary of its founding, Accuphase released the separate type SA-CD/CD player combo DP-900/DC-901, incorporating all of its superb technology and heralding the beginning of a new age. The products were enthusiastically received in Japan as well as overseas and have found their rightful place as the ultimate reference for SA-CD sound quality. The DP-550 features an exclusive mechanism developed in-house by Accuphase and benefits in many ways from the advanced technology of the flagship models. It is a high-performance integrated SA-CD/CD player that represents the fruits of intensive research and many extended listening sessions. Like other Accuphase players before it, the DP-550 is dedicated purely to the optimal reproduction of two-channel music sources. The player lets the listener experience the sonic splendor of SA-CDs and CDs without any restraints or limitations. The newly designed high-grade SA-CD drive mechanism in the DP-550 is the ultimate tool for extracting the information on SA-CD discs one hundred percent. It not only keeps internal vibrations of rotating parts to a minimum, but is also highly impervious to external vibrations. 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 Stream Digital) format to be processed with utmost accuracy. The all-important laser pickup is a new single lens/twin laser diode type with high-speed access mechanism, achieving extremely precise signal readout. The digital processor section of the DP-550 features an innovative method called MDS+ (Multiple Delta Sigma+) developed by Accuphase. With MDS+, the DSD signal is supplied directly to multiple D/A converters arranged in a parallel configuration. After conversion, the signals from the converters are summed which has the effect of minimizing conversion errors. The D/A converters in the DP-550 are the latest Hyperstream™ types (ES9008 from ESS Technology Inc.). Using four of these superb devices in parallel results in amazing conversion accuracy with drastically improved parameters: minimal THD, high S/N ratio, and excellent low-level linearity. The full wealth of the musical information on the SA-CD can finally emerge before the listener.

SA-CD/ CD

HS-LINK

Coaxial

Digital Inputs

Optical

USB

DP-550 Block Diagram

HS-LINK Decoder

Coaxial

Receiver

Optical

Receiver

USB

Receiver

SA-CD Optical

Head

Optical

Head

Motor

Driver

Interface Decoder

Digital Signal

Processor

Signal

Processor

Digital Servo

Processor

Infrared

Receiver

From

Remote Commander

D/A Conversion

⊿ΣDAC

D/A Conversion

⊿ΣDAC

Features and Functions of Transport Section

■ High-grade SA-CD/CD drive.

q Highly rigid and precise construction with sturdy, heavyweight chassis to absorb external vibrations. w

Traverse mechanism achieves floating design with newly developed

viscous dampers.

Massive bridge cover.

Non-resonant design and low center of gravity further reduce vibrations.

High-quality disc tray extruded from an aluminum block, plus super-

quiet and smooth disc loading mechanism.

■

SA-CD/CD transport outputs ultra pure digital signal.

■

Single lens/twin pickup highspeed access mechanism.

■ Accuphase’s proprietary

high-quality digital audio interface HS-LINK (carries both SA-CD and CD signal).

New chucking magnet design

■

using neodymium with high flux density, together with 8-

Chucki ng magn et

■Support for DSD discs

recorded using DSF file format on a computer or similar.

■ MDS+ type D/A converter with four DACs driven in parallel.

■ Digital level control allows adjustment down to -80 dB.

■ Separate transport and processor sections, with inputs and

outputs for HS-LINK, coaxial, optical, and USB (input only).

■ Sampli ng fre quency indicati on

(kHz) during transport operation an d wh en u sin g ex t ern a l i n put .

■ Triple layer bottom plate and carbon cast iron insulator feet with superior damping characteristics absorb vibrations for optimum sound quality.

■ Phase selector for balanced outputs.

■ Balanced and line analog outputs (1 set each).

Clock

Generator

Digital Audio

Interface Encoder

Master Control

Computer

MDS

System

MDS

System

Key

Matrix

＋

Display

pole magnetizing yoke firmly and evenly graspsthe turntable andpreventsdisc wobble.

Mechan ism base

High-grade SA-CD/CD drive

Features and Functions of Digital Processor Section

Sampling frequency

display example

LVDS

Driver/

Receiver

Coaxial

Transmitter

Optical

Transmitter

5-Pole

Butterworth

Low-Pass Filter

5-Pole

Butterworth

Low-Pass Filter

5-Pole

Butterworth

Low-Pass Filter

5-Pole

Butterworth

Low-Pass Filter

5-Pole

Butterworth

Low-Pass Filter

5-Pole

Butterworth

Low-Pass Filter

HS-LINK

Coaxial

Optical

Line

Balanced

Line

Balanced

Transport Outputs

Left Analog Outputs

Right Analog Outputs

Disc t ray

Digital control PCB

Digital signal processing and DAC PCB

High-reliability parts selected for sound quality

■Assembly with 5-pole analog

filter, line/balanced analog output circuitry, power supply circuitry etc.

Bridge

Traverse mechanism

Newly developed viscous dampers

Page 3

■Supplied remote

commander RC-110

Giveaccess to various functions

including direct play, repeat, input switching, and level control.

Further Refined MDS+ Type D/A Converter

MDS+ is a revolutionary approach that employs multiple delta-sigma type D/A converters connected in parallel, for drastically improved performance. The same digital signal is supplied to each converter, and the output of the converters is summed before being sent to subsequent stages. The signal components in the combined output are simply added up, thereby increasing their level, but components that are due to conversion errors may cancel each other out, causing a reduction in level compared to simple summing. This is turn increases the ratio of the target signal to error components, resulting in a drastic improvement in all relevant aspects of converter performance, such as accuracy, S/N ratio, dynamic range, linearity, and THD. (When the number of converters is taken as "n", the improvement is √n.) In the DP-550, four Hyperstream™ DACs (ES9008 from ESS Technology Inc.) are used in parallel. Compared to a single converter, this results in an overall performance improvement by a factor of 2 (= √4). Because the performance improvement afforded by the MDS principle is not dependent on signal frequency or signal level, noise at very low levels that has plagued the output of conventional delta-sigma converters can also be reliably reduced.

Direct Balanced Filter With Separate Line/Balanced Circuitry

The analog filter designed to remove so-called aliasing noise in the very high frequency range employs 5-pole Butterworth analog filters with extremely flat frequency response in the passband. In order to prevent unwanted interaction, completely separate low-pass filters are provided for the line and balanced signal paths.

Digital Input

⊿ΣDAC

×4

＋

MDS

D/A Conversion

System

＋

−

5-Pole

＋

Butterworth

−

LPF

5-Pole

＋

Butterworth

−

LPF

5-Pole

＋

Butterworth

−

LPF

＋

Balanced

−

Line

Analog Outputs

Digital input

〔%〕

0.1000

0.0500

0.0300

0.0200

0.0100

0.0050

0.0030

0.0020

0.0010

0.0005

0.0003

0.0002

0.0001

(Normal phase

output)

DAC1

(Reverse phase

output)

DAC2

DAC3

DAC4

4 circuits driven in parallel

Block diagram of MDS+ converter in DP-550

THD+NOISEvsFREQUENCY

30 50 100 200 500 1k 2k 3k 5k 10k

THD + noise vs. frequency

(current) / V (voltage) converter

I-V

Current

Source

I-V

Current summing

Analogoutput〔dB〕

−

100

−

120

−

140

−

140−120−100−80−60−40

20k

〔Hz〕

Linearity (Digital input vs. analog output)

−

＋

Subtraction

LINEARITY

DAC output

−

Digitalinput〔dB〕

Page 4

— Accuphase Exclusive Digital Interface — HS-LINK: High Speed LINK

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, including conventional digital signals as well as 2.8224 MHz/1-bit and 192 kHz/24-bit signals.

Digital Audio Signal

HS-LINK Encoder

Security

Control

TIA/EIA-644 LVDS Driver/Receiver

RJ-45

Connector

HS-LINK

cable

RJ-45

Connector

TIA/EIA-644 LVDS Driver/Receiver

HS-LINK Decoder

Security

Control

Digital Audio Signal

HS-LINK Block Diagram

DG-48 connection example

The DG-48 can be connected between the transport outputs and digital inputs of the DP-550 (using HS-LINK, coaxial, or optical connection). This allows sound field compensation of the signal from the CD transport in the digital domain.

HS-LINK cable supports trans mi ss io n of both SA-CD and CD signals.

DIGITAL INPUTS

HS-LINK cable

TRANSPORT OUTPUTS

DP-550

DIGITAL INDIGITAL OUT

DG-48

Utilizing the USB port

The USB port (Type B) on the DP-550 can be connected to a computer using a USB cable (USB Type B connector).

● Depending on the computer, it may

be necessary to first install the software on the "USB Utility" CD-ROM supplied with the DP-550.

● The capability for playing back mu-

sic data via USB depends on the operating system and the music

P C

USB cable

DP-550

USB port

playback software of the computer. For information on computer settings

●

and connection methods for USB, refer to the documentation of the computer.

High- resol ution m usic data up to 192 kH z/24- bit downloade d to th e com puter can be pl ayed back via t he US B lin k.

Analog output

Audio cable

Preamplifier

■ Front Panel

DP-550 Guaranteed Specifications

Guaranteed specifications are measured according to the JEITA standard CP-2402A.

Measurement disc: PHILIPS 3122-783-00632

Transport section

●

Compatible disc formats

CD DSD disc (DSF file format)

● Data read principle Non-contact optical pickup

Laser diode wavelength

● CD: 780 nm

Transport section outputs

● Suitable cable: COAXIAL Format: IEC 60958 compliant OPTICAL Format:

e r

■ Rear Panel

i !0o

!2!1 !3 !5

Digital processor section

● Digital inputs HS-LINK Connector type: RJ-45

COAXIAL Format: IEC 60958 compliant OPTICAL Format: USB Format: USB 2.0 Hi-Speed (480 Mbps compliant)

Sampling frequency

●

32 kHz to 192 kHz/24-bit (2-channel PCM)

2.8224 MHz/1-bit (2-channel DSD) USB, COAXIAL 32 kHz to 192 kHz/24-bit (2-channel PCM) OPTICAL 32 kHz to 96 kHz/24-bit (2-channel PCM)

● D/A converter 4 MDS+ principle

Frequency response

●

Total harmonic distortion 0.0007% (20 to 20,000 Hz)

q Input indicator:

HS-LINK / COAXIAL / OPTICAL / USB

w Repeat indicator e Power switch r SA-CD/CD selector button t Input selector button y Current track indicator u Total number of tracks indicator i Disc tray o Time indicator !0 Disc tray open/close button !1 Output level indicator !2 Play button !3 Pause button !4 BACK / NEXT track

search buttons

Remarks

★This product is available in versions for 120/220/230 V AC. Make sure that the voltage shown on the rear panel matches the AC line voltage in your area. ★230 V version has an Eco Mode that switches power off after 120 minutes of inactivity. ★The shape of the AC inlet and plug of the supplied power cord depends on the voltage rating and destination country.

!7 !8

!5 Stop button !6 Digital inputs (USB, OPTICAL, COAXIAL, HS-LINK) !7 Transport outputs (OPTICAL, COAXIAL, HS-LINK) !8 Balanced output phase selector !9 Analog outputs

Balanced output connectors q Ground w Inverted (-) e Non-inverted (+) (Can be changed with phase selector !8) Line output connectors

@0 AC power connector

★

Supplied accessories

●

AC power cord

●

Audio cable with plugs (1 meter)

●

Remote Commander RC-110

★

@0!9

●

Signal-to-noise ratio 118 dB

●

● Dynamic range 115 dB (24-bit input, low-pass filter off)

● Channel separation

● Output voltage BALANCED: 2.5 V 50 ohms, balanced XLR type

and impedance LINE: 2.5 V 50 ohms, RCA phono jacks

Output level control 0.0 dB to -80.0 dB, 1-dB steps (digital)

●

General

● Power requirements

50/60 Hz

● Power consumption 23 W, standby: 0.5 W

● Max. dimensions Width 465 mm (18-5/16")

Height 151 mm (5-15/16") Depth 393 mm (15-1/2")

● Mass 18.5 kg (40.8 lbs) net

25.0 kg (55.1 lbs) in shipping carton

2-channel Super Audio CD

SA-CD: 650 nm

HS-LINK Connector type: RJ-45

HS-LINK

0.7 - 50,000 Hz +0, -3.0 dB

108 dB (20 to 20,000 Hz)

AC120 V/220 V/230 V (Voltage as indicated on rear panel)

Suitable cable:

Dedicated HS-LINK cable

JEITA CP-1212 compliant

Dedicated HS-LINK cable

JEITA CP-1212 compliant

●

Specifications and design subject to change without notice for improvements.

http://www.accuphase.com

L1205Y PRINTED IN JAPAN 850-2178-00（B1）