ONKYO Integra C-501XD
¥ 49,800 (around 1988)
Commentary
This CD player was developed using various technologies developed by ONKYO.
An optical converter is installed to obtain a purer analog signal.
Instead of using a constant voltage power source supplied from a normal power transformer as a constant current source, which is the source of music signals, a photovoltaic element converts completely independent light energy into electric energy and amplifies it for use.
The digital filter is equipped with an 8 x oversampling digital filter.
The sampling frequency is shifted to 352.8 kHz, which is 8 times higher than 44.1 kHz, and the noise is removed by a low-order analog filter with moderate characteristics, away from the music signal.
Using an optical transmission method, CD data is optically transmitted, the electrical loop is cut off, and the intrusion of digital noise into analog circuits is eliminated to improve sound quality.
It is equipped with a random calendar of 5 rows and 4 columns in which you can put the randomly selected music in your stomach.
The audio circuit uses a super servo amplifier configuration.
The pickup part adopts a double suspension system using non-resilient rubber, etc.
An independent power supply system with dedicated digital and analog windings is adopted.
Wireless remote control is included.
Model Rating
| Type | CD Player |
| Sampling frequency | 352.8 kHz (8 x oversampling) |
| Frequency characteristic | 2 Hz to 20 kHz ± 1 dB |
| Harmonic distortion factor | 0.003%(1kHz) |
| Dynamic range | 96dB |
| Signal-to-noise ratio | 100dB |
| Wow flutter | Below Measurement Limit (Crystal Accuracy) |
| Output level (analog) | 2 Vrms (fixed, variable) |
| Pick-up | Semiconductor laser pickup (3-beam system) |
| Digital output terminal | 2 systems (coaxial, optical) |
| Line output terminal | 2 systems (fixed, variable) |
| External dimensions | Width 435x Height 117x Depth 312 mm |
| Weight | 5kg |
| Attachment | Remote control |