■ DP-950: Digital-only SA-CD/CD transport ● High-rigidity, high-precision SA-CD/CD drive● Accuphase original digital interface: HS-LINK■ DC-950: Digital processor with revolutionary SA-CD reproduction technology MDSD● MDS++ type D/A converter with 8 circuits driven in parallel ● "Direct Balanced Filter"with totally separate line and balanced signal paths ● Eight inputs including HS-LINK and USB

The Pinnacle of Perfection

PRECISION SA-CD TRANSPORTThe centerpiece of the DP-950 is its
ultra-massive SA-CD/CD drive with highly
rigid, high-precision construction. This iscomplemented by an ultra-strong power
supply featuring two high-efficiency toroidaltransformers and an array of filtering
capacitors. The result is an SA-CD/CDtransport that delivers a digital signal of
unsurpassed purity.

The Shape of the Future

PRECISION MDSD DIGITAL PROCESSORThe DC-950 is the ultimate digital processor
using only specially selected materials andadvanced digital technology. Glass fluorocarbon resin PCBs and completely separate
power transformers for digital and analog
circuitry assure peerless performance thatbrings out the full musical richness of thedigital source signal.

The supreme heavy-weight SA-CD/CD transport — The ultra-massive drive mechanism is machined with utmost
precision, and the highly rigid construction with low center of gravity eliminates any unwanted vibrations.
A luxurious disc tray is linked to an utterly quiet and smooth loading mechanism. Support for the digital audio
interface HS-LINK Ver. 2 ensures accuracy on a level that far surpasses earlier standards, allowing the separatetransmission of clock and data signals for enhanced purity. The DP-950 ushers in a new era of information fidelity,
fully bringing out the enormous amount of musical detail stored on high-quality digital media.

PRECISION SA-CD TRANSPORTThe Technology of Precision

Newly developed high-rigidity, high-precision SA-CD/CD drive
8 mm thick aluminum frame
Aluminum alloy bridge

External vibrations reliably blocked by super-massive sturdy chassis
Highly rigid and precise construction
The SA-CD/CD drive is mounted firmly to a strong aluminum frame, andthe drive loading mechanism and mechanical base form a massive andhighly rigid chassis of considerable weight (total 11.7 kg). Conversely, thetraverse mechanism, an integrated structure consisting of the opticalassembly including laser pickup and rotating parts, is designed for
extremely light weight, and isolated from the loading mechanism by afloating suspension arrangement. A large, super-heavy bridge machinedfrom a single block of aluminum is joined to the mechanism base to form
an integrated structure.
"Traverse Mechanism" with 4-point floating design and viscousdampers

Traverse mechanism

Integrated construction with large heavyweight aluminum alloy
bridge mounted to mechanism base

Disc tray

High-quality disc tray extruded from an aluminum block
Super-quiet smooth disc loading mechanism featuring dual stay
configuration for steel bearing shafts
Low center of gravity to further control and reduce vibrations

Dual stay bearing shaft

Mechanism base

12 mm thick heavyweightbottom plate

Disc tray

Aluminum alloy bridge

Parts machined from aluminum block
Viscous dampers

Mounting configuration ofviscous dampers■ Remote commander RC-120 suppliedwith DP-950

Controls DP-950 functions such as
direct play, repeat, etc.
Also controls DC-950 functions
such as input switching and output
level adjustment, and can serve
for volume control of
Accuphase amplifiers.

Bottom plate

Mechanism base

Taking Audio Development to the Next Level
Dedicated digital output only SA-CD/CDtransport for highly accurate signal pickup
A digital servo system with a dedicated DSP for control of
the optical pickup and the various motors allows optimized
operation for SA-CD and CD media respectively, assuring
stable and highly accurate signal readout.

Single-lens/twin laser diode pickup handles
the 650 nm wavelength (SA-CD) and 780 nm(CD) with dedicated diodes for reliablehigh-speed access
Strong power supply with high-efficiency toroidaltransformers and custom-made filtering capacitors
Two separate high-efficiency toroidal transformers in conjunction with ten specially made high-quality filtering capacitors(4,700 μF/35 V) are used to separately power the SA-CD/CD
drive mechanism and the signal processing section. The
result is a perfectly stable digital signal of high accuracy.

DP-950 and DC-950 connection example
DP-950HS-LINK

CD transport or otherdigital source equipment

T-1100

DIGITAL OUT

DIGITAL OUT

Optical fiber cable

Coaxial cable

HS-LINK cable

The DC-950 is equipped with a total ofeight inputs for digital signals from otherdevices. As shown in the example, thisallows its use for high-quality music reproduction from various sources, including
the DP-950, a computer, and other components.

＊ A single HS-LINK cablecaries both SA-CD andCD signals.

USB port

USB cable(With Type B connector)

USB port

ComputerPreamplifier

DC-950

Analog output

Balanced connection example

Audio cable

Advanced Features
Support for HS-LINK Ver. 2 means that clock and data
signals can be transmitted separately for direct input
of a high-purity signal to the D/A converter, resulting
in a drastic improvement in performance and quality.
High-quality playback of CD media as well
The sophisticated SA-CD signal processing technology of the
DP-950 also benefits conventional CD media, allowing highly
accurate signal readout for playback with excellent quality.

N

Advanced High Carbon cast iron insulator feet withsuperior damping characteristics further enhancesound quality
Visually stunning cabinet made of carefully selectedexquisite wood with natural grain and finished to amirror polish

S

S

Easy to read display
The 7-segment display is larger than earlier displays of thistype, for improved readability. ＊Text display is not supported.

One RJ-45 output (HS-LINK) for SA-CD and CD, andone dedicated coaxial output for CD

N

N

Support for playback of DSC discs with DSF file format

Chucking magnet using neodymium is designed tofirmly and evenly hold the disc to prevent wobble
The 8-pole magnetized yoke of the magnet ensures uniform
force to securely clasp the turntable and the disc to prevent
disc wobble.

S

S

N

About HS-LINK Ver. 2
HS-LINK Ver. 2 is a further elevated version of the Accuphase HS-LINK interface, providing significantly
expanded sampling frequency and quantization support up to 5.6448 MHz/1-bit 2-channel DSD and 352.8 kHz
and 384 kHz/32-bit 2-channel PCM. ● The DC-950 can reproduce both HS-LINK (Ver. 1) and HS-LINK Ver. 2 signals.

Sampling frequencies

Number of bits

HS-LINK (Ver. 1)
32.0 kHz, 44.1 kHz,
48.0 kHz,88.2 kHz, 96.0 kHz, 176.4 kHz,
192.0 kHz / 16 to 24-bit 2-channel PCM

HS-LINK Ver. 2
32.0 kHz,44.1 kHz,
48.0 kHz,88.2 kHz,
96.0 kHz,
176.4 kHz,
192.0 kHz,352.8 kHz,
384.0 kHz /16 to 32-bit 2-channel PCM

2.8224 MHz / 1-bit 2-channel DSD

2.8224 MHz, 5.6448 MHz / 1-bit 2-channel DSD■ Capability to carry the SA-CD signal as well as conven-tional digital audio signals■ Transfer rate: min. 400 Mbps (logical limit 1923 Mbps)■ Transfer signal format: Low Voltage Differential Signal-

Supplied with DP-950:
HS-LINK cableing (LVDS) TIA/EIA-644■ Send/receive clock fully synchronized■ Cable type: dedicated HS-LINK cable

AHDL-15● Cable length: 1.5 m● Triple shielded twisted pair
8-conductor OFC cablePRECISION MDSD DIGITAL PROCESSOR

Innovation Meets Accuracy

A digital processor that redefines the state of the art — Digital signal processing is implemented
through an ultra-high-speed FPGA in conjunction with innovative MDSD reproduction
technology, forming a double-speed high-precision moving-average filter circuit for straight D/Aconversion of the DSD signal. Eight digital inputs including USB with support for 11.2896 MHz(1-bit 2-channel DSD) and 384 kHz (32-bit 2-channel PCM), as well as an HS-LINK connector(Version 1 and 2) provide enhanced versatility for the ultimate in performance and sonic purity.

Ground-breaking digital processing: MDSD (Multiple Double Speed DSD) with support for 11.2896 MHz (1-bit 2-channel DSD)The DSD signal by principle contains quantization noise components which rise drastically outside the range of human hearing and which must be removed. In
conventional designs, a digital filter inserted before the D/A converter serves to cut the noise, and an analog filter with a gentle slope setting is then used after theconverter to derive the analog output. The DC-950 by contrast takes a completely different approach. An FPGA (field-programmable gate array) is used in the digitalprocessing section, together with a moving-average filter circuit for clock shifting. This innovative MDSD reproduction
circuit topology is capable of highly effective noise removal. A major advantage is the fact that conversion errors in the D/Astage are kept extremely small, while the high-cut filter function is already integrated in the circuit.
● High-cut filter function reliably removes signal components outside the range of human hearing (almost exclusively
noise components).
● Conversion errors that could affect signal components in the range of human hearing are minimized, similar to MDS.
Double Speed High-Precision Moving-Average Filter Circuit(7 delay circuits shift input signal in very small increments)

Linearity

Analog output[dB] 0

DAC

Delay

－20
－40

DAC

Delay

－60

I -V

－100
－120

1/2
Delay

DAC

－140
－140

DAC Output

DAC

Delay

I -V

Converter

0

－60

－40

－20
0
Digital input [dB]Linearity (digital input vs. analog output)
THD + noise vs. frequency

0.00500.00300.0010DAC
Clock Shift－80

0.0020Digital Input
DSD Signal－1000.0100

DAC

Delay

－120

[%]

DAC

Delay

11.2896 MHz
1bit 2ch DSD－80

Converter

DAC

Delay

0.5

1

1.5

2

2.5

3

3.5

Power Summing/
I-V Conversion

8 DAC signals
are summed

0.00050.00030.00020.0001

Block Diagram of MDSD (Multiple Double Speed DSD) Topology

20 30

50

100

200

500

1k

2k 3k

5k

10k

Total harmonic distortion (incl. noise)vs. frequency response

20k
[Hz]

Excitement That Lasts Forever
MDS++ type D/A converter with 8 parallel circuits
and support for 384 kHz (32-bit 2-channel PCM)
The super-advanced MDS++ type D/A converter used in
the DC-950 was developed to further push the envelope,
resulting in breathtaking performance and PCM signal
reproduction of the highest order. Pioneering the application of the latest 32-bit Advanced Hyperstream™ DAC chip
(ES9038PRO) from ESS Technology Inc., a solution for
driving eight circuits in parallel was successfully implemented. Compared to a single converter circuit, this arrangement
improves overall performance by a factor of about three.

Strong power supply with high-efficiency toroidaltransformers and array of custom-made filtering capacitors
Two separate highly efficient toroidal transformers in conjunction
with specially made high-quality filtering capacitors (total 80,000 μF)
are used to separately power the digital and analog sections.
USB
RX

USB
1

OpticalRX

2

OpticalRX

OPTICAL

1
DigitalInputsCOAXIAL 2

DigitalOutputs

5-PoleButterworth
Low-Pass Filter

MDSD (Multiple Double Speed DSD) System
Delay
Delay

Line

MDS＋＋

D/A Conversion
5-PoleButterworth
Low-Pass Filter

DSD Signal

Left
AnalogBalanced Outputs
Connection

CoaxialRX

3

CoaxialRX

BALANCED

BalancedRX

HS-LINK

HS-LINK
RX

COAXIAL

CoaxialTX

OPTICAL

OpticalTX

Interface
Decoder

5-PoleButterworth
Low-Pass Filter

MDSD (Multiple Double Speed DSD) System
Delay
Delay

Balanced

5-PoleButterworth
Low-Pass Filter

PCM Signal

CoaxialRX

MDS＋＋
D/A Conversion
5-PoleButterworth
Low-Pass Filter

DSD Signal

Line
Right
AnalogBalanced Outputs
Connection

5-PoleButterworth
Low-Pass Filter

PCM Signal

BalancedDC-950 Block Diagram

Advanced Features
Easy to read display
The 7-segment display is larger than earlier displaysof this type, for improved readability.
Display can show sampling frequency andnumber of quantization bits
Filter amplifier printed circuit board made fromglass cloth fluorocarbon resin with low dielectric constant and minimum loss
Digital level control allows adjustment down to–80 dB.
The level control employs the digital principle for optimum accuracy and minimal degradation of soundquality. Integration of the level control function in theD/A converter prevents noise and provides a wide
adjustment range down to –80 dB.
Balanced connectors to shut out external noiseinterference
Phase selector for balanced output
Versatile array of inputs including HS-LINK(Version 1 and 2), BALANCED, COAXIAL x 3,
OPTICAL x 2, and USB

I/V amplifier assembly

DAC assemblyFilter amp assembly

Using USB cable to connect a computer
The DC-950 is equipped with a USB port (Type B). This allows a computer with a music library
to be connected via a USB cable (with Type B plug), for playback of high-resolution music data
up to a sampling frequency of 384 kHz/32-bit or 11.2896 MHz (1-bit DSD) with high quality.
＊ Before using the USB port, install the suitable software for thecomputer from the supplied USB Utility 2 CD-ROM.
USB port

ComputerUSB cable(with Type B plug)＊ Playback of music data via the USB link is dependent on the operating system and music playback software of the computer.
＊ For information on USB settings and connection, refer to the
documentation of the computer.

USB port

One COAXIAL and one OPTICAL digital output
Advanced High Carbon cast iron insulator feetwith superior damping characteristics further
enhance sound quality
Massive wood cabinet with natural grain, individually finished by master craftspersons

Preamplifier

USB port (Type B)

DC-950

Analog output

Balanced connection

Audio cableFront Panel

Front Panel
LOCKED indicator
Quantization bit display
Sampling frequency
display

SA-CD/CD indicator
Total track display
Repeat indicator
Lit: SA-CD
ALL/ONE
Out: CD
Playing track display
Time display

Play button
Pause button
Track search buttons
BACK,
NEXT

Power switch
SA-CD/CD button
Disc tray(Fast
Reverse) ,Power switch(Fast
Forward)

Input selector buttons
USB OPTICAL1,2 COAXIAL1,2,3
BALANCED HS-LINK

Rear Panel

Rear Panel
Digital input connectors
Analog output connectors
HS-LINK BALANCED
LINE BALANCEDCOAXIAL 1,2,3 OPTICAL 1,2
Line output connectors
USB
Balanced output connectors
Pin ② － , Pin ③ ＋(Can be switched with phase selector switch)

Digital output connectors
HS-LINK (SA-CD/CD signal)
COAXIAL (CD signal only)

AC power connector ★

Guaranteed Specifications＊Guaranteed specifications measured according to JEITA standard CP-2402A

2-channel SA-CD (Super Audio CD)
DSD disc (DSF file format)
CD

Data read principle
Non-contact optical pickup
Laser diode wavelength
SA-CD: 650 nm
CD:
780 nmDigital outputs
HS-LINK Connector type: RJ-45
Suitable cable: dedicated HS-LINK cable
SA-CD
Ver. 1, Ver. 2: 2.8224 MHz / 1 bit DSD
CD:
44.1 kHz / 16-bit PCM
COAXIAL Format:
IEC 60958 compliantCD:
44.1 kHz / 16-bit PCM
Powerrequirements

120 V, 220 V, 230 V AC, 50/60 Hz(voltage as indicated on rear panel)Power consumption
16 W
Maximum dimensions
Width 477 mm (18.8 in)
Height 156 mm (6.1 in)
Depth 394 mm (15.5 in)
WeightOutput level control buttons
DOWN UP

Stop button

Disc tray open/close button

Compatible
disc formats

Output level display

30.6 kg (67.5 lbs) (with batteries)
38.0 kg (83.8 lbs) in shipping carton

Digital output connectors
COAXIAL OPTICAL

Phase selector switch for
AC power connector ★
balanced output connectors

Guaranteed Specifications＊Guaranteed specifications measured according to JEI TA standard CP-2402A

Digital inputs
HS-LINK
Connector type: RJ-45
Suitable cable: dedicated HS-LINK cable
BALANCED Format:
IEC 60958/AES3 compliant
Suitable cable: 110 ohm digital balanced cable
COAXIAL
Format:IEC 60958/AES3 compliant
Suitable cable: 75 ohm coaxial digital cable
Format:JEITA CP-1212 compliant
OPTICAL
Suitable cable: JEITA standard optical fiber cable
Format:USB 2.0 High Speed
USB(480 Mbps compliant)Suitable cable: USB 2.0 cable
Supported sampling frequencies
HS-LINK (HS-LINK Ver. 2)
32 kHz to 384 kHz (16 to 32-bit 2-channel PCM respectively)
2.8224 MHz, 5.6448 MHz (1-bit 2-channel DSD)

Digital outputs
COAXIAL
Format: IEC 60958 compliant
OPTICAL
Format: JEITA CP-1212 compliant
D/A converter

8 MDSD principle (DSD signal)
8 MDS++ principle (PCM signal)

Frequency response

0.5 to 50,000 Hz +0, –3 dB

Total harmonic distortion 0.00045% (20 to 20,000 Hz)
Signal-to-noise ratio

122 dB

Dynamic range

119 dB

Channel separation

120 dB (20 to 20,000 Hz)

Output voltage and impedance
BALANCED: 2.5 V 50 ohms, balanced XLR typeLINE:
2.5 V 50 ohms, RCA phono jackOutput level control

0 dB to –80 dB (digital)

BALANCED, COAXIAL

Power requirements

120 V, 220 V, 230 V AC, 50/60 Hz(voltage as indicated on rear panel)

OPTICAL

Power consumption

31 W

Maximum dimensions

Width 477 mm (18.8 in)
Height 156 mm (6.14 in)
Depth 393 mm (15.5 in)24.2 kg (53.4 lbs) net
31.0 kg (68.3 lbs) in shipping
cartonUSB

32 kHz to 192 kHz (16 to 24-bit 2-channel PCM respectively)
32 kHz to 96 kHz (16 to 32-bit 2-channel PCM respectively)
44.1 kHz to 384 kHz (16 to 32-bit 2-channel PCM respectively)
2.8224MHz, 5.6448 MHz, 11.2896 MHz (1-bit 2-channel DSD)
(11.2896 MHz: ASIO only)

Supplied with DP-950● Remote Commander
RC-120● AC power cord
● HS-LINK cable AHDL-15● Cleaning cloth

WeightSupplied with DC-950● AC power cord
● Audio cable ASL-10 withplugs
● USB Utility 2 CD
● USB Utility 2 Setup Guide● Cleaning cloth

Optional HS-LINK cable (supplied with DP-950)● AHDL-15 (1.5 m)＊ AHDL-30 (3.0 m) available by special order

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.
★ The 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.

●

The specifications and appearance of this product are subject to change without notice.

5年間保証
DP-950：3年間保証

J1605 Y PRINTED IN JAPAN 850-2197-00（B1）