SONY CDP-502ES
¥ 150,000 (around 1984)
Commentary
A CD player developed for a new generation of reference machines.
High-speed linear motor tracking mechanism is adopted.
The newly developed linear motor for CD players is integrated into the optical block, enabling high-speed access with a selection time of one second from the first song to the last song on the disc.
Uses a unilinear converter system that performs all digital signal processing in complete synchronization with one type of clock.
Beat generation due to interference of two or more clocks is prevented.
The filter is equipped with a newly developed (at that time) digital filter with excellent phase characteristics and distortion characteristics.
The mechanical, digital digital part and analog part are completely separated, and the audio circuit is composed of all stages of LR twin-mono structure to eliminate interference between channels.
In addition, a GIC-type low-pass filter that can cut out unwanted bands without affecting the music signal, and a rigid copper-plated chassis are used to eliminate the possibility of sound quality degradation.
Specially selected parts such as LC-OFC and Celafine electrolytic capacitor are used in large quantities for wire materials for audio signals, and newly developed operational amplifiers for output amplifiers.
The power supply circuit consists of a digital section, an analog section, a servo system and a display section that are independent of each other, and a discrete constraint stabilizing power supply with sufficient allowance for the analog section.
In addition, the Z-core of the OFC winding is equipped with a large power transformer and a large-capacity electrolytic capacitor to improve response to music signals.
Equipped with RMS function of up to 20 songs that can be added or changed during performance.
One touch direct music selection function with 20 keys.
Equipped with timer standby switch.
Model Rating
| Type | Compact disc digital audio system |
| Reading system | Non-contact high value reading (using semiconductor laser) |
| Laser | GaAlAs double hetero diode |
| Number of revolutions | Approximately 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 |
| Harmonic distortion factor | 0.0025% or Less (1 kHz) |
| Dynamic range | 96 dB or more |
| Wow and flutter | Below the measurement limit |
| Output level | 2Vrms(MSB) |
| Headphone output level | 28 mw (32 Ω) (MSB) |
| Pwer | AC100V 50Hz/60Hz |
| Power consumption | 16W |
| External dimensions | Width 430x Height 80x Depth 335 mm |
| Weight | 8.5kg |
| Attachment | Wireless Remote Control RM-D502 |