SONY CDP-203
¥ 79,800 (released in 1986)
Commentary
Equipped with a unilinear converter system, this full-size CD player achieves high sound quality.
The Unilinear converter system synchronizes the circuits of the D/A converter, digital filter and EFM de-modulator to a single master clock for all digital signal processing, which in principle prevents beat generation in the audio band due to interference of two or more clocks.
It also incorporates a newly developed high-precision digital filter to improve the distortion and phase characteristics.
The optical pick-up cap is made of a material that is less susceptible to unwanted vibration. The optical block and disk table are separated into a floating structure to reduce the influence of external vibration and improve the accuracy and stability of tracing.
The optical block, circuit system and main circuit board are arranged in the chassis completely separated from each other, and structural rigidity is also improved by repeatedly examining the position of screws. This reduces the influence of circuit system vibration on audio and digital circuits and eliminates resonance.
In addition, the special damping material used in the CDP 553 esd is used to suppress the transformer vibration.
The analog section has a simple and straight design. In addition, the digital section, analog circuit and power supply circuit are all arranged on a single printed circuit board to achieve a high-purity circuit design.
A microcomputer for system control is also integrated into the display section.
The analog section uses a carbon resistor for audio with a non-magnetic cap, a large-capacity power transformer for digital / analog independent power circuits, and a oxygen-free copper power cord.
In addition, the CDP-203 uses a gold-plated output terminal.
The board is fixed in the middle between the top and bottom of the chassis, which is less affected by magnetic distortion. In addition, a non-magnetic oxygen-free copper heat sink and mounting screws are also made of copper-based screws to eliminate adverse effects on sound quality.
Equipped with a music Karenna Gore Schiff that displays up to 20 songs at once.
It is equipped with functions such as RMS function which can register up to 20 songs, original shuffle play, auto space play which automatically makes between songs 3 seconds, 5-mode repeat of 1 song / all songs / between A and B / RMS / shuffle, music search and index search.
Synchronous terminal and subcode output terminal are mounted.
A 20-key wireless remote control is included.
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Model Rating
| Type | Compact disc digital audio system |
| Reading system | Non-contact optical reading (using semiconductor laser) |
| Laser | GaAlAs double hetero diode |
| Number of revolutions | 500 ~ 200 rpm (CLV) |
| Playing speed | 1.2m/s ~ 1.4m/s (constant) |
| Error correction method | Sony Super Strategy Cross Interleaved Read-Solomon Code |
| Number of channels | 2 Channel |
| Compound | 16-bit straight line |
| Frequency characteristic | 2 Hz to 20 kHz ± 0.3 dB |
| Signal-to-noise ratio | 98 dB or More (EIAJ) |
| Dynamic range | 96 dB or more (EIAJ) |
| Total harmonic distortion factor | 0.003% or less (EIAJ) |
| Channel separation | 93 dB or more (EIAJ) |
| Wow and flutter | Below the measurement limit (± 0.001% W. PEAK) (EIAJ) |
| Output level | 2Vrms(MSB) |
| Headphone output level | 28mW/32 Ω (MSB) |
| Power consumption | 11W |
| External dimensions | Width 430x Height 80x Depth 285 mm |
| Weight | 4.2kg |
| Attachment | Wireless Remote Control RM-D350 |