In 2008, Accuphase launched DP-400 which wasinstalled the original dedicated CD drive mechanism into
the market.
DP-400 attracted tons of audiophiles and music lovers,and known as the best seller model.
It has been evolved in 2013 as DP-410, then, DP-430 is
the 3rd generation of DP-400 series.
Technical high lights of DP-430 are exclusive design for
CD playback and achieved ultra low THD and noise
performance.
They are inherited from our flagship SA-CD transport
DP-950 and digital processor DC-950.

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DP-430 can show the sampling frequency and thenumber of effective bits of all input signals on the front
display.
Quantization bits are counted directly from raw data byusing a high speed Complicated Programmable LogicDevice.

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The dimensions and weight of DP-430 are same as
those of DP-410.
Simple but rigid basic structure is inherited from DP-410.

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Transport mechanism is an exclusive design for CDplayback. The large Bridge cover is very effective for
reducing the noise caused from motor drive and the air
flow of disc rotation. Furthermore, a laser pickup module
is mounted on vibration absorbers. Those are made ofthe silicon carefully-selected for this mechanism.

4DP-430 is applied simple but functional module layout.
Each circuit block is logically arranged to make the signal
path as short as possible.
The digital circuit block is on the right and the analog
circuit block is on the left at the back panel side.
Digital high speed line is transferred through fullybalanced circuit to avoid from radiating noise.

5Ultra Low Noise is one of the main technical features of
DP-430.
The former model, DP-410 had the excellent noise
performance, however, DP-430 achieves 55% loweroutput noise voltage than DP-410.
DP-430 guarantees 117dB Signal to Noise ratio whichmeans 3.5μV of output noise voltage.

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DP-430 proudly shows the great THD+Noisecharacteristics which are quite important for the quality ofmusic playback.
And this chart clearly proves that DP-430 is superior
beyond comparison with the former model DP-410.

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For D/A converter section, Accuphase updates the DAC
chip to Asahi Kasei Micro Electronics’ Premium DAC
AK4490EQ for DP-430.
AK4490EQ has 2 DACs inside, and DP-430 uses 4DACs connected in parallel per channel withAccuphase’s unique technology, MDS (Multiple DeltaSigma) conversion system.
To obtain extreme low distortion and noise performance,
Accuphase developed new circuit technology which isnamed ANCC(Accuphase Noise and distortion
Cancelling Circuit).
This technology is for the filter amp circuit thatcompensates distorted waveform of the circuit.
The circuit works as 4th order LPF to reduce the noisefrom DACs.
And also Fully-balanced structure is employed after D/Aconverter section in DP-430.

8ANCC is the latest Accuphase’s unique technology.
To reduce noise from DACs, filter amp needs wide
dynamic range and linearlity.
High voltage power supply and complicated architecture
is required to obtain expected performance.
ANCC needs only general main amplifier and small low
noise OP-AMP as the sub-amplifier.
Feedback loop cancels the distortion of main amp, andfeedforward loop negates the detected distortion, andthis shows the same effects on noise also.
This new technology contributes to make accurate D/Aconversion with a simple circuit.

9DP-430 has 3 digital inputs, Coaxial, Optical and USB.
USB Input accepts 384kHz/32bit-PCM or 11.2896MHzDSD. DSD data can be received both DoP（DSD overPCM）and ASIO2.1.
Coaxial and Optical Transport outputs are also available.
Transport part and DAC part can work separately and it
allows users to practice ways of use.
DG-58 can be connected easily between Transport
output and Digital input of DP-430.

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