MDS COMPACT DISC PLAYER● High-grade CD drive ● MDS+ type D/A converter with four parallel
circuits ● Direct Balanced Filter with separate line and balanced signalpaths ● Programmable playlists that can change track order ● Sampling
frequency and quantization bit display ● Transport outputs and digital
inputs ● Digital interface with USB input ● Digital connection withan Accuphase voicing equalizer ● Balanced output phase selection

The ideal CD player for disc playback
Accuphase has spent 35 years developing CD players in pursuit of the best in disc playback.
The DP-450 CD player combines a number of innovative technologies, including a CD drive
mechanism with a strong integrated structure, high-quality elastic dampers that protect the lens
actuator from vibration, and MDS+ type D/A converters with four parallel circuits. The DP-450
extracts the full potential of any CD to deliver a listening experience that stays with you.
Features and Functions of Transport Section■ Accurate Reading
Vibration countermeasures in CD players that read audio datafrom rotating discs greatly impact the sound quality. By placing
the high-rigidity drive mechanism as close to the base as possible,
the DP-450 significantly reduces external vibrations from beingtransmitted to the traverse mechanism and protects the lens actuatorthat reads the discs. The high-quality elastic dampers that connect
the traverse and disc loading mechanisms reduce the magnification ofnatural resonances in the lens actuator, improving reading precision.
Additionally, the chucking magnet is an 8-pole neodymium bonded
magnet for high magnetic flux density and dimensional accuracy.
This chucking magnet secures the turntable and disc evenly andfirmly to enable uniform disc rotation without wobbling.

■ Quiet Operation
Creating a quiet listening environment is a vital component in enjoying
music. Vibrations from spinning discs that are transmitted to the chassis
resonate and amplify operational sounds. The elastic dampers that
support the traverse mechanism inhibit vibrations from discs and greatly
reduce chassis resonance. The three-layer large bridge surrounding
the traverse mechanism also shields against vibrational noise fromhigh-speed rotation. This technological development allows the DP-450
to operate quietly without being affected by disc rotation.

■ High-grade CD drive
Large bridge

Traversemechanism
Mechanism
base
Bearing shaft
Disc tray

Turntable

Traversemechanism

S

Elasticdampers■ Smooth loading
Carved from an aluminum block and then finished with a hard anodized
aluminum and satin treatment, the elegant and elaborate disc tray uses
high-quality bearing shafts to open and close smoothly and quietly.

NSN

N
S

NS

8-pole magnetic fieldObjective lens and actuator

Traverse
holderTraverse mechanism supported by elastic dampers

Chucking magnet

Traverse mechanism

Features and Functions of the Digital Processor Section■ MDS+ (Multiple Delta Sigma) type D/A converter with fourparallel circuits

The MDS+ conversion principle is a revolutionary D/A conversion routing
method that employs multiple delta-sigma type D/A converters connectedin parallel for drastically improved performance.
By passing output from the high-performance
ES9026PRO DAC chip (ESS Technologies) through4 parallel converter circuits, the DP-450 almost
doubles (=√4) overall performance for distortion,
noise, linearity, and more. Because the improvements
provided by the MDS+
DAC：ES9026PRO
principle are independent of signal frequency
and level, output signal
noise at very low levels
can also be minimized,a feat that conventionaldelta-sigma converters
find extremely difficult
to achieve.
4MDS+ principle D/A converter

I (current) -V (voltage) conversion

DAC 1

I-V

(Reverse phaseoutput)

DAC 2

Digital Input−DAC 3

Subtraction

DAC 4

I-V

Current summing

4 circuits driven in parallel■ 4MDS+ type D/A converter block diagram
0.01

00.0070.005−200.003

−40
−60

0.001
0.0007−800.0005−1000.0003
0.00020.0001
20 30

Direct Balanced Filter circuits

DAC output+Level
Shifter0.002■ Direct Balanced Filter circuits
The Direct Balanced Filter circuits withindependent line and balanced outputs
achieve stable signal transmission
because there is no interference frommutual loads, producing ideal performance and sound quality.

(Normal phaseoutput)−120
50 70 100

2005001K

2K 3K

5K 7K 10K

20K

Total harmonic distortion(incl. noise) vs. frequency response−140−140−120−100−80−60−40−200

Linearity (digital input vs. analog output)

Digital inputs

Transport outputs

Balanced and line analog outputs

DSDPCMLow noise power supply circuits

Digital input & output circuits

Sampling frequency and quantization bit display
Aluminumplate
Open-cellfoamChuckingmagnet

Low center of gravity with recessed CD drive placement
Steel plate(1.6 mm thick)BridgeThree-layer large bridge with excellent sound insulation

CD drive
installation location

Standard…

■ A high-rigidity, top-quality CD drive that operates quietly■ MDS+ type D/A converter with four parallel circuits■ Direct Balance Filter circuits comprised of independentline and balanced circuits create the ideal signal output■ Power transformer with independent analog anddigital windings■ Low noise power supply circuits using amplifier technology■ Programmable playlists so that you can enjoy yourmusic in the order you want
■ Display with sampling frequency and number ofquantization bits
■ Adjustable output level to match signal with different
output levels from other players■ Digital connection to connect with an Accuphase voicing
equalizer for sound field correction in the digital domain■ Digital inputs (USB, OPTICAL, COAXIAL) so you canenjoy a variety of sound sources■ Transport output terminals (OPTICAL, COAXIAL) thatwork with the D/A converter■ 2 (balanced, line) analog outputs■ Phase selector that can invert the balanced output■ Low-center of gravity thanks to a recessed bottom
plate slot allowing the CD drive to be installed as low
as possible■ Three-layer large bridge for excellent sound insulation■ High-quality, high-carbon cast iron insulators withexceptional vibration damping■ “Power-on play” that automatically starts playbackwith a timer (commercially available)

High-carbon castiron insulators

Bottom plate with recessed CD drive slot for
ultimate low center of gravity
Programmable
Phase selector
playlist■ Supplied RC-140
remotecommander

High-carbon
cast iron insulators

Minimum

Outputlevel display

Connecting to a voicing equalizer

Connecting to a TV, etc.

Connecting to computers, etc.

By connecting a voicing equalizer between
the transport outputs and digital inputs of
the DP-450, sound field compensation in thedigital domain becomes possible.

Connecting the device to a TV, etc. using a digital
signal allows the DP-450’s high-grade D/A converterto convert analog sound and music signals forreproduction through your stereo system.

The DP-450 is equipped with a USB port (type B),
allowing for high resolution playback when connected to a PC via a USB cable.

A digital equalizer with
automatic sound fieldcorrection of left/rightchannel differences.

Voicing equalizer

TV, etc.

Coaxial digital cable

Coaxial digital cableorFiber-optic cableDP-450DP-450Preamplifier

Front Panel

Power switch

Total number of tracks /Quantization bits readout

Output level

Open / Close button

USB

Sampling
Frequencies

OPTICAL
COAXIALDSD
USBPCM
OPTICAL PCM
COAXIAL PCM

Back / Next
Fast Reverse

Transport outputs
Analog outputs
COAXIAL / OPTICAL BALANCED phase selectorbuttons
Fast Forward

AC power
supply connector

Analog outputs
BALANCED 2nd: –, 3rd: +[Guaranteed specifications measured according to the JEITA standard CP-2402A]

CD
Non-contact optical pickup
790 nmJEITA CP-1212 compliant -(,7$VWDQGDUGRSWLFDO¿EHUFDEOH
IEC 60958 compliant
75-ohm coaxial digital cable
USB 2.0 Hi-Speed
USB 2.0 cable(480 Mbps) compliant
with Type B connector-(,7$VWDQGDUGRSWLFDO¿EHUFDEOHJEITA CP-1212 compliant
IEC 60958 compliant
75-ohm coaxial digital cable
2.8 / 5.6 / 11.2 MHz (11.2 MHz is ASIO only)
1 bit
32 / 44.1 / 48 / 88.2 / 96 / 176.4 / 192 / 352.8 / 384 kHz 16 to 32 bits
32 / 44.1 / 48 / 88.2 / 96 kHz
16 to 24 bits
32 / 44.1 / 48 / 88.2 / 96 / 176.4 / 192 kHz
16 to 24 bits

Supplied accessories● AC power cord
● Audio cable with plugs AL-10● Remote Commander RC-140

Analog outputs LINEStop button

Guaranteed Specifications

Digital Inputs

Digital inputs
COAXIAL / OPTICAL / USB

Repeat indicator

Play button
Pause button

Disc tray

Preamplifier

Rear Panel

Performance time

Input button

Compatible Disc Formats
Data Read Principle
Laser Diode Wavelength
Transport
OPTICAL
Outputs
COAXIAL

DP-450Preamplifier

Frequency indicator

Input indicator＊Compatible sampling frequencies
PCM signals: 384 kHz/32-bit or lower
DSD signals: 11.2 MHz/1-bit or lower(11.2 MHz is for ASIO only)

USB 2.0 cable withType B connectororFiber-optic cable

Current track /sampling frequency readout

PC, etc.

＊Use PCM signal as inputs.
The PCM signal may need tobe set on the source device.

D/A Converter
4MDS+ principle
Frequency Response
0.7 to 50,000 HzíG%
THD + Noise
0.0008%20 to 20,000 Hz
S/N Ratio
119 dB
Dynamic Range
116 dB
Channel Separation
113 dB
20 to 20,000 Hz
2.5 V 50 ohms
Balanced XLR typeOutput Voltage BALANCED
and ImpedanceLINE
2.5 V 50 ohms
RCA phono jackOutput Level Control
G%WRíG%In 1-dB steps
DigitalPower Requirements
120 V, 220 V, 230 V AC (voltage as indicated on rear panel), 50/60 Hz
Power Consumption
11 W
Maximum Dimensions
Width 465 mm (18.3”) × Height 151 mm (6.0”) × Depth 393 mm (15.5”)
Net
13.7 kg (30.2 lbs)
Mass
In shipping carton
20 kg (44 lbs)

● USB Utility 3 CD

● USB Utility 3 Setup GuideRemarks★ 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 plug of the supplied AC power cord depends on the voltage rating and destination country.

●The specifications and appearance of this product are subject to change without notice.
F2105Y

850-2224-00（B1）

PRINTED IN JAPAN