DP-720 is the successor of DP-700.
It is the flag ship model of all-in-one CD/SA-CD players
from Accuphase.

1Features of DP-720(a)New SA-CD Drive
Newly developed SA-CD Drive.
(b) MDS++/MDSD D/A Conversion System
8 DAC chips are driven in parallel on each channel.

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SA-CD mechanism drive was newly designed for DP-720.
The mechanism drive was progressed from the DP-900’s
philosophy which is efficient vibration control and low
center of gravity.
Light-weight laser pick up unit is employed. Light-weightpick up has the advantage on anti-vibration.
We also re-design a new chucking pulley that is made ofneodymium magnet.
The performance for efficient vibration and low center ofgravity is improved by the dual L-shaped aluminum
frames which reinforce Mechanical Base.

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Anti-Vibration property is close to DP-900.

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DSD-disc Available
DSD-disc is a DVD which is written .dsf property music
data by PC.
The new CD drive is compliance with DSD-disc.
You can enjoy DSD format- music data with DP-720.

5Features(a) 8 parallel D/A converters
8 D/A converters are driven in parallel for DP-720.
This is as same as DP-700 but this time we changed the DACchip.
DP-700 has AD1955 of Analog Devices.
DP-720 has ES9018 of ESS Technology.
These DACs are essential for our original circuit MDS++ for CD
and also original circuit MDSD for SA-CD.
(b) Glass fluorocarbon resin Print Circuit Board
Teflon Print Circuit Board is used for analog circuit.
(c) Direct Balanced Filter
DP-720 has full balanced circuit post-filter.
(d) Many kinds of Digital I/O6

MDS++ is a technique to make DAC parallel.
The same digital signal is supplied to each converter.
The output of each DAC is combined.
The specialty of MDS++ is dividing the addition intocurrent addition and voltage addition to reduce the loadof I-V converter.
The Audio signal values are added up. But conversion
error and noise cancel each other.
The ratio between the signal and conversion errors
increases. So the converter performance is improved.
The improvement degree works by a square root of thenumber of DACs.
Current Source optimizes the OPERATING POINT of I-V
converter.
In DP-720, overall performances are improved by afactor of 2.8.

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MDSD means Multiple Double Speed DSD.
The DSD signal has big noise in the high frequency. It
must be removed.
MDSD works as low pass filter to remove a noise in thehigh frequency and works as MDS++ improving
characteristics in the low frequency.
The point of MDSD is delay elements.
DSD signal in DP-720 is D/A converted with half-delayed
clock and the output is combined.
As the analog output becomes half-clock time resolution,it allows double speed operation.
This configuration is moving-average filter. It works ascomplete linear phase LPF and remove high frequency
noise of DSD signal.

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Full-balanced structure is employed after D/A converterin DP-720.
In addition, the independence low pass filter is installed
for all audio outputs.
Due to this, the sound signal from all the outputs
becomes high quality.

9The electrical performances of DP-720 approach thequality of DC-901.

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DP-720 is equipped with four input and External DSP I/O.
External DSP is for DG-58.
USB input is up to 192kHz/24bit compliance and works
with asynchronous mode.

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