Accuphase DP-700 Brochure

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m High-rigidity, high-precision SA-CD/CD drive m Innovative digital signal

processor with MDSD technology driven in parallel Filter” with totally separate balanced and unbalanced signal paths m Transport outputs and digital inputs m Accuphase HS-Link digital interface

m “Ultra Jitter-Free Plus” PLL circuit m “Direct Balanced

m MDS++ D/A converter with eight DACs

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The ultimate integrated SA-CD/CD player — High-rigidity, high-precision

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

loading mechanism. Ground-breaking MDSD (Multiple Double Speed DSD)

digital signal processing circuitry constitutes a moving average ﬁ lter for

straight D/A conversion. Superior quality digital audio interface HS-Link.

When Accuphase introduced the ultimate separate-type SA-CD/CD player, the models DP-800 and DC-801, a new epoch in audio history had begun. Garnering worldwide acclaim both for their technological excellence and sound quality, the transport and processor pair has become the new reference for SA-CD reproduction.

The new DP-700 is an integrated type SA-CD player incorporating that very same state-of-the-art technology. Major highlights are the ultra-rigid SA-CD/CD drive assembly and the MDSD principle that takes the DSD signal straight from the digital to the analog domain. Latest digital signal processing technology is in evidence throughout. Extensive series of listening tests were conducted to shape the DP-700 into the world’s foremost integrated SA-CD/CD player. As with all other Accuphase players so far, a conscious decision was made not to support multi-channel formats but rather focus on extracting the ultimate in musical ﬁ delity from two-channel SA-CD music sources.

In the transport section, a dedicated DSP chip controls the digital servo to assure accurate readout of the signal recorded on the SA-CD. Another vital aspect is the single-lens/twin laser diode pickup mounted to a highspeed positioning mechanism, providing a signiﬁ cant improvement in read access times and accuracy. The processor section features the innovative MDSD principle forming a sophisticated moving average filter circuit, together with the MDS++ D/A system that keeps conversion errors to an absolute minimum and at the same time acts as high-cut ﬁ lter efﬁ ciently removing noise components in the high frequency domain. The Direct Balanced Filter provides separate low-pass ﬁ ltering for the balanced and unbalanced signal paths, and the analog balanced output circuitry eliminates interference during signal transmission. The overall result is simply outstanding sonic performance that removes the last veil from the music and beautifully demonstrates what the SA-CD format is all about.

Internally, the transport and processor sections of the DP-700 are kept entirely separate. Digital inputs allow independent use of the processor section for external sources to enjoy music reproduction with the same superb quality.

Features and Functions of Transport Section

n High-rigidity, high-precision SA-CD/CD drive

Highly rigid and precise construction with sturdy, heavyweight chassis to absorb external

vibrations

“Traverse Mechanism” with ﬂ oating design Massive aluminum alloy bridge Low center of gravity to further reduce vibrations High-quality disc tray extruded from an aluminum block, plus super-quiet smooth disc

loading mechanism

n SA-CD/CD transport outputs ultra pure digital signal n Single-lens/twin pickup high-speed access mechanism n Support for text data display n Accuphase’s proprietary digital audio interface HS-Link (carries both SA-CD

and CD signal)

Aluminum alloy bridge

Traverse Mechanism

Disc tray

Mechanism base

High-rigidity, high-precision SA-CD/CD drive

Viscous dampers

Accuphase Exclusive Digital Interface

HS-Link : High Speed Link

HS-Link is an ultra high-quality digital audio interface developed by Accuphase using the latest digital signal transmission technology. It supports send/receive veriﬁ cation for copyright protection. The LVDS (Low Voltage Differential Signaling) principle allows a single dedicated HS-Link cable to transmit all audio data with utmost ﬁ delity, including

2.8224 MHz/1-bit and 192 kHz/24-bit signals.

DP-700 Block Diagram HS-Link Block Diagram

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Innovative digital signal processing : MDSD (Multiple Double Speed DSD)

2.8224 MHz/1-bit 5.6448 MHz/1-bit

Digital input

DSD signal

Reduces noise during volume processing

Shifts the effective ﬁ lter frequency upwards

Upsampler

Digital volume processing

Volume

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 ﬁ lter principle. In the DP-700, this involves seven delay devices and eight MDS++ type D/A converters. The signal is delayed (shifted) progressively by one clock cycle to produce eight 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 minimum by the use of MDS++ type DACs, the MDSD principle results in an 8-pole high-cut ﬁ lter with perfectly linear phase characteristics.

5.6448 MHz/1-bit

Delay

device

Delay

device

Delay

device

Delay

device

Delay

device

Delay

device

Delay

device

“Moving-average ﬁ lter” circuit

Normal phase output

Delayed by 1 clock cycle

Reverse phase output

I (Current) - V (Voltage) converter

Current summing Voltage summing

DAC output

Supplied remote commander

RC-100

Gives access to various functions

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

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Features and Functions of Digital Procssor Section

n MDSD (Multiple Double Speed DSD) implements innovative

digital signal processing.

n MDS++ D/A converter with eight DACs driven in parallel n Ultra Jitter-Free Plus PLL circuit n “Direct Balanced Filter” provides totally separate analog low-

pass ﬁ ltering for balanced and unbalanced signal paths.

n Digital level control allows adjustment down to –80 dB. n D/A converter printed circuit boards made from Teﬂ on (glass

ﬂ uorocarbon resin) with low dielectric constant and low loss.

n Power-on play feature allows automatic playback. n HS-Link, coaxial, and optical transport output connectors and

digital input connectors. Insertion of DG-38/DG-48 for sound ﬁ eld compensation in digital domain also possible.

n Balanced and unbalanced

analog outputs (1 each)

n “Advanced High Carbon” cast

iron insulators with excellent absorption characteristics control vibrations to ensure high sound quality.

n Massive wood cabinet with

persimmons ﬁ nish.

Front Panel

* Teﬂ on is a registered trademark of DuPont USA.

Power supply assembly

MDSD assembly

Digital signal processing assembly

Transport output/digital input assembly

Guaranteed Speciﬁ cations

* Guaranteed speciﬁ cations are measured according to the JEITA standard CP-2402A. * Measurement disc: PHILIPS 3122-783-00632

Transport section

m Compatible disc formats 2-channel Super Audio CD

m Data read principle Non-contact optical pickup m Laser diode wavelength SA-CD: 650 nm

CD: 780 nm

m Transport section outputs HS-Link Connector type: RJ-45

Suitable cable: Dedicated HS-Link cable COAXIAL Format: IEC 60958 compliant OPTICAL Format: JEITA CP-1212 compliant

DG-38/DG-48 connection example

The DG-38/DG-48 can be connected between the transport outputs and digital inputs of the DP-700 (using either the HS-Link, coaxial, or optical connector). This allows sound field compensation of the signal from the CD transport in the digital domain.

DIGITAL OUTDIGITAL IN

HS-Link cable

When HS-Link cable is used, transmission of both SA-CD and CD signals is supported.

Digital processor section

m Digital inputs HS-Link Connector type: RJ-45

Rear Panel

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Input indicators : TRANSPORT/HS-LINK/ COAXIAL/OPTICAL Track number indicator Index indicator Time indicator Output level indicator SA-CD/CD indicator Repeat indicator Program indicator Power switch SA-CD/CD selector button Input selector button Disc tray

Remarks

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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.

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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

Audio cable with plugs (1 meter)

Remote Commander RC-100

Cleaning cloth

Disc tray open/close button Play button Pause button Track search buttons: BACK/NEXT Stop button Digital inputs (HS-Link, coaxial, digital) Transport outputs (HS-Link, coaxial, digital) Analog outputs Balanced output connectors (analog)

Ground Inverted (–) Non-inverted (+) Unbalanced output connectors AC power connector

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Suitable cable: Dedicated HS-Link cable COAXIAL Format: IEC 60958 compliant OPTICAL Format: JEITA CP-1212 compliant Sampling frequency 32 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 0.5 - 50,000 Hz +0, –3.0 dB m

Total harmonic distortion + noise

m Signal-to-noise ratio 114 dB m Dynamic range 110 dB (24-bit input, low-pass ﬁ lter off) m Channel separation 108 dB (20 to 20,000 Hz) m

Output voltage and impedance

UNBALANCED: 2.5 V 50 ohms, RCA phono jack

m Output level control 0.0 dB to –80.0 dB (digital)

General

m Power requirements AC120 V/230 V 50/60 Hz

(Voltage as indicated on rear panel)

m Power consumption 35 W m Max. dimensions Width 477 mm (18-3/4”)

Height 156 mm (6-1/8”) Depth 394 mm (15-1/2”)

m Mass 27.0 kg (59.5 lbs) net

33.0 kg (72.8 lbs) in shipping carton

0.0008% (20 to 20,000 Hz)

BALANCED: 2.5 V 50 ohms, balanced XLR type

Speciﬁ cations and design subject to change without notice for improvements.

http://www.accuphase.com

K0705Y PRINTED IN JAPAN 850-0169-00 (AD1)