Audio Database

Image of the PD-T04
Commentary

A turntable CD player with Legato Link Conversion.

Equipped with the Legato link conversion system, which was developed for more natural music playback.
In this circuit, music signal data recorded on a disc is connected by a smooth function curve suitable for reproducing natural sounds and the frequency components of musical instruments, enabling the reproduction of original audio signals with less ringing (waveform distortion).
By estimating the music signal at the time of recording before recording based on the signal recorded on the CD, it is possible to reproduce the sound of 20 kHz or higher according to the 1/f attenuation characteristic, thus realizing natural sound.

A turntable system is adopted for the mechanism.
A pickup and a spindle motor are installed above the disk, and signals are read from the disk rotating on a 12-cm-diameter turntable. The large moment of inertia of the turntable, which supports the disk from the bottom to the entire surface, and a spindle motor with ample starting torque are used to achieve stable rotational performance that is resistant to load fluctuations.

The D/A converter is equipped with a high-speed pulse flow 1bitD/A converter independently developed by Pioneer for the left and right.
The 1-bit system has the advantage that 0 cross distortion and glitch noise do not occur in principle. Moreover, by operating the noise shaping at an extremely high oversampling frequency of 384 fs, smooth output is possible and the noise floor due to requantization is greatly reduced. Therefore, the effect of out-of-band noise can be kept low by using a low-order secondary noise shaper.
In addition, the effect of jitter is reduced by operating the master clock at a low clock frequency of 16.93 MHz.

It uses direct construction, a center tray design, a pick-up mechanism in the center of the chassis, and a layout of main circuits along the signal flow to ensure the shortest distance from the pick-up to the output terminal.
This reduces the influence of external noise.

The power supply section is equipped with twin power transformers for digital / servo circuits and analog circuits.
The power supply circuit uses a 3-part 7-regulator to independently rectify three parts (servo / digital, D/A converter, and audio), eliminating mutual interference to ensure a stable power supply.

A honeycomb chassis with excellent rigidity is used for high damping effect, and a honeycomb structure is used for the insulator to suppress the reflection of external sound.
A resin stabilizer is installed in the second to improve the vibration isolation of the chassis.

Built-in functions such as Computer Program Edit, Time Fade Edit and Auto Program Edit.

It is equipped with peak search, memory hold, display off switch and digital / analog switching switch.

Equipped with CD-DECK synchro terminal.

Model Rating
Type CD Player
Pick-up Three beam semiconductor laser system
Frequency characteristic 2 Hz to 20 kHz
Signal-to-noise ratio (EIAJ) 115 dB or more
Dynamic Range (EIAJ) 99 dB or more
Channel Separation (EIAJ) 110 dB or more
Wow & flutter (EIAJ) Measurement limit (± 0.001% W. PEAK) or less
Harmonic distortion factor (EIAJ) Not more than 0.0017%
Output voltage 2.0Vrms
Number of channels 2 channels (stereo)
Digital output Optical output : -15dBm ~ -20dBm (wavelength 660 nm)
Pwer 100 VAC, 50Hz/60Hz
Power consumption 11W
External dimensions Width 440x Height 131x Depth 286 mm
Weight 5.0kg
Attachment Wireless Remote Control