PIONEER P-D70 (1983) | Sounds of The Future

 

Pioneer bring the miracle of LaserDisc™ technology to the new P-D70 Compact Disc player. Now, many of the revolutionary laser-optic and digital electronic techniques first developed for the sensational LaserDisc™ brand videodisc systems are yours to enjoy in the P-D70 Compact Disc player from 1983. Your favourite music is permanently stored in digital form on a pocket-sized disc enabling the total beauty and excitement of a live performance to be re-created in your home. Here's how Pioneer does it: 3-spot laser beam with three sophisticated servo systems. Focus parallel drive servo to improve sensitivity and quick search. High-quality audio-use components and a new LSI for better sound. Convenient search and random access put the fun in hi-fi. This is a second generation  CD player developed by taking advantage of optical technology cultivated in laser discs and the latest digital technology. It is equipped with Pioneer's in-house developed pickup utilizing the know-how accumulated in the development of optical video disc players. The pickup drive employs a focus parallel drive mechanism in which multiple magnetic circuits and multiple coils are placed in a straight line between objective lenses. This increases the sensitivity of the drive system and enables high-precision and high-speed search. The signal processing circuit is equipped with a newly developed LSI consisting of two chips, which greatly contributes to miniaturization and low power consumption, and realizes stable disk rotation control. The analog section is equipped with a newly developed 11th-order low-pass filter enclosed in a copper cap. High-performance parts such as high-sound resistance for high-wage audio equipment, polypropylene and mica capacitors, and 70 μ m copper foil printed circuit board are used. The display uses a pure digital signal display monitor with binary display and peak display. In binary mode, the change in the upper 12 bits of the 16-bit PCM signal read from the disk except for the sign bit is directly displayed. Since each bit has a weight of 6 dB, it is possible to see a signal level change of 72 dB (-54dB to + 18 dB). When the level meter switch is switched to the peak mode, a peak meter of 4 dB per dot is used for differential operation. The display range is -32dB to + 12 dB. Subcode output terminal (eventually never implemented) and wired remote control terminal are mounted at the back of the unit.

Powered by www.1001hifi.com