PROCEED PDP
¥ 380,000 (released in 1990)
Commentary
Based on the D/A converter circuit and analog audio circuit developed for PCD, a D/A converter was developed by adding a unique interface circuit.
In a PDP, the interface circuit at the input stage improves the digital signal.
In this circuit, the input signal passes through a top-of-the-line pulse transformer for computers and is fed into a proprietary DAS receiver circuit, which removes any distortion from the transmission path and adjusts the waveform to a shape close to the original signal before sending it to the D/A converter stage.
The analog circuits incorporate as much as possible the results of Mark Levinson's amplifier development.
In addition, the power supply circuit for PCD is adopted as it is, and PDP with less load compared with PCD realizes a sufficient power supply.
There are four types of digital input jacks, a coaxial Route 3 and a balanced one, which can be selected with the select switch on the front panel. The selected digital signal automatically determines the sampling frequency and displays the corresponding frequency from among 32, 44, and 48.
In addition to one unbalanced and one balanced output terminal, a coaxial digital output terminal is also installed.
This digital output does not directly output the input digital signal, but is output after the waveform is adjusted by the DAS receiver in the interface circuit of the input stage.
Model Rating
Type | D/A converter |
Frequency characteristic | 10 Hz ~ 20 kHz + 0 -0.2 dB |
Total harmonic distortion factor | 0.004% (1 kHz, 0 dB) |
Signal-to-noise ratio | 105dB |
Channel separation | 120dB |
Dynamic range | 98 dB or more |
Output impedance | 1 Ω or less |
Pwer | 100 VAC, 50Hz/60Hz |
External dimensions | Width 214x Height 87x Depth 397 mm |
Weight | 7.0kg |