Audio Database

Image of the PD 515
Commentary

A CD player developed using Pioneer's digital technology.

Uses an 8 x oversampling digital filter.
The digital signal sampled at 44.1 kHz is raised eight times to 352.8 kHz to eliminate unwanted aliasing noise from the audio band. This makes it possible to use a low-order analog filter with loose characteristics in the final stage of the analog filter, thereby achieving low-distortion sound quality with less phase rotation in the high-frequency range.

The D/A converter is equipped with a twin linear envelope D/A converter system that focuses on the generation of distortion due to bit error. The distortion factor is reduced by adjusting the upper bit error to an appropriate value one by one.
In addition, since it is a glitch less type that does not require a deglitch circuit, it has excellent reproducibility of minute signals.

It uses a magnetic clamp type disk stabilizer that is an improved version of Pioneer's original disk stabilizer that reduces unnecessary vibration of the disk.
The disk stabilizer and disk table are fixed by the attractive force of the magnet, and the disk is rotated without contact with other mechanisms. This reduces vibration generated by the disk rotation system and prevents vibration from being transmitted to the pickup.

A ballast base is used to protect the optical system mechanism from external vibration.
The center of gravity is lowered from the support part of the mechanism part to prevent unstable rolling and sound quality is improved by fixing it on the ceramic mechanism support.

It uses a honeycomb chassis with increased structural strength by providing honeycomb ribs on the chassis.
In addition, the use of a large insulator reduces external vibration.

When a pit signal is read by a laser beam and converted into an RF signal, a slight time lag occurs between the preceding signal and the following signal of the four photodetectors, and a high-frequency phase difference is generated.
In order to solve this problem, we have adopted an Accu-Focus system. By delaying the preceding signal and aligning it with the latter Yukinobu, we have improved the high-frequency characteristics of the RF-signal and obtained more faithful RF-signals.

It is equipped with functions such as time fade edit, auto program edit, one touch fade, random play and auto space.

Equipped with digital level control, volume can be adjusted by remote control.

Equipped with a power on start function that enables timer start.

Model Rating
Type CD Player
Pick-up Three beam semiconductor laser system
D/A conversion 16-bit straight line
Frequency Response (EIAJ) 4 Hz to 20 kHz ± 0.5 dB
Signal-to-noise ratio (EIAJ) 104 dB or more
Dynamic Range (EIAJ) 96 dB or more
Channel Separation (EIAJ) 100 dB or more
Wow & flutter (EIAJ) Measurement limit (± 0.001% W. PEAK) or less
Total Harmonic Distortion Factor (EIAJ) Not more than 0.0035%
Output Voltage (EIAJ) 2.2 V ± 0.3 V
Number of channels 2 channels (stereo)
Digital output Coaxial Output : 0.5Vp-p/75 Ω
Optical output : -15dBm ~ -20dBm (wavelength 660 nm)
Pwer 100 VAC, 50Hz/60Hz
Power consumption 11W
External dimensions Width 420x Height 98x Depth 315 mm
Weight 4.0kg
Attachment Remote control