|270,000 yen(December, 1989 release)
CD player which introduced the technology cultivated with the highest-class
separate type CD player, and was developed.
An 18-bit D/A converter is
selected carefully and adopted as a D/A converter.
In order that this
converter may improve the engine performance to a limit, it can adjust bit
accuracy now, adjusts all the products to the maximum in a product line taking
advantage of this advantage, and is pulling out the marginal engine performance.
The cutoff characteristic of an audio filter of removing an unnecessary
noise ingredient for a sampling frequency instead of an integral multiple
quantity comb is made loose, and it is serving to remove a sound quality
In DP-11, the oversampling digital filter is adopted here
8 times, and the decrease guess for 24.1kHz - 328.7kHz is oppressed on the level
Moreover, pass band Rippl leading to sound quality degradation
had become a filter of the highest level which is less than ±0.00005dB and is
obtained those days.
The 3rd discrete GIC Butterworth active filter
which selected the element carefully was adopted as the audio low PAL filter, and the unnecessary ingredient is cut into it in the loose characteristic of 18
A digital signal portion and analog circuitry are electrically
separated by the "optocoupler."
An optocoupler is a 40 Mbit/sec ultra high-speed type, and full separation
is carried out electrically, using this four per channel, and it is performing
faithful signal transmission by light.
Moreover, even if it intercepts in a signal course, in order to prevent
invading through a power-source part, the power transformer of digital one and
analog circuitry is made to become independent, respectively, and is considered
as 2 transformer composition, and in order to raise the audio characteristic,
the winding wire of the analog transformer is considered as right-and-left
Moreover, in order to prevent the high frequency noise
ingredient in which it interferes in electrostatic through space, each circuit
was completely shielded on the thick metal plate, and these interference is
The linear motor mechanism is adopted as the tracking of a
laser pickup, it controls by the 8-bit microprocessor developed for exclusive
use, and quick song selection for about 1 second is enabled.
A mechanism part is mounted on an aluminum die-casting frame, and prevents
resonance, and also carries out floating from a chassis, and is intercepting
transfer of vibration. Floating of the disc table was carried out by this,
and the vibration from the outside to a mechanism main part is stopped
to the minimum.
Moreover, a mechanism main part is supported
with a thick metal chassis, and it is thoroughly strengthened to vibration, and
has a structure strong against resonance or vibration by having made the whole
into strong frame structure.
The noise shaper is carried in order to
decrease quantization noise further.
This is a technique of returning an
error to the following data in the slight roundness which a digital filter
generates, and carrying out noise reduction, and is reducing the noise in an
audio frequency band.
A high region is raised at the time of recording, and in order to correspond
to CD in which the emphasis which carries out part descent was applied
at the time of playback, digital demphasis which changes the characteristic
in the state of a digital signal is carried.
realized the characteristic of the deflection of ±0.001dB, and less than 1.5
phase difference to the predetermined characteristic.
In the audio
stage, the output of a converter is set up and amplifier is made into
direct-current servo direct connection system of only a buffer so that there may
be no necessity for magnification. This has improved S/N and the distorted
The advantage of 18 bits is efficiently employed in
volume control, and volume control of a digital system is carried in it.
level control which there was little sound quality degradation and was excellent
thanks to a 2-bit margin also where volume is extracted is made possible.
The variable range can be adjusted with a remote commander by 0--24dB.
The output terminal carries one balanced two RCA phono jacks and XLR
Moreover, the optical fiber and 75-ohm coaxial output based on
a digital audio interface which the Accuphase advocated the digital output and
were enacted by the EIAJ standard are carried.
If you make it a timer
interlocked with and a power source is turned on, the power-on play function
which starts a performance automatically is carried.
||The digital signal playback machine only for
||CD standard format
The number of
quantization: 16 bits
Sampling frequency: 44.1kHz
The number of channels: Two channels
Number of rotations:
Performance speed: 1.2 - 1.4 m/s regularity
||Non-contact optical reading (semiconductor
||GaAlAs (it is a terrorism diode to double)
||Rudder resistance type 18 bit
||8 time oversampling
Digital demphasis function
Deflection of ±0.001dB
|THD + noise
||0.002% (for 20Hz - 20000Hz)
|An Output power/Output load impedance
||Balanced: 2.5V/50 ohm (25ohm/25ohm), a
balanced XLR type
Unbalanced: 2.5V/50 ohm, a RCA phono jack
level control: For 0 - -24dB, a 1dB step
|Digital output format level
||Format: Digital Audio Interface
Optical:optical power: -21 - -15dBm (EIAJ), and luminescence
Coaxial: 0.5 Vp-p/75ohms
|The semiconductor used
||Transistor: 15 pieces
IC: 46 pieces
Diode: 26 pieces
||the width 445x height 95(piece -- it
includeds) x depth of 325mm
|Attachment: Remote commander RC-4
|Remote control system
||Infrared pulse system
||SUM-3 (an IEC name, R6), two pieces
|The maximum Dimensions
||Width 64x height 176x depth of 18mm
||180g (Battery included)