KENWOOD DP-5060
¥ 45,000 (around 1995)
Commentary
A CD player equipped with a D. R. I. V. E. system to improve the reproducibility of minute signals.
Equipped with the D. R. I. V. E. (Dynamic Resolution Intensive Vector Enhancement) system, which was developed using original signal processing technology, to improve digital processing of music signals from small level to near silence.
The conventional digital filter aims to remove unnecessary components outside the audible band included in the original digital signal. It can smoothly output low-level abnormal signals with a 20-bit resolution in the calculation process. However, it could not obtain sufficient effect in the region below the low-level, and it could only obtain output close to the original 16-bit signal.
To solve this problem, the D. R. I. V. E. system uses real-time processing (a technique that processes all music signals instantaneously) using adaptive filter technology to improve micro-level reproducibility and responsiveness to impulsive sounds such as attack sounds.
The D. R. I. V. E. processor is located between the 8 x Oversampling & 20 x digital filter and the 20-bit data input D/A converter. It is processed so that the output from the digital filter is always 20-bit accurate even in the range where only 16-bit accuracy can be obtained.
The internal section consists of a low-pass filter and a delay unit with cutoff frequencies within different audible frequency bands. The delay unit adjusts the amount of delay generated by the low-pass filter. Data from the digital filter is distributed from the input terminal, input to each delay unit, and then input to each LPF. Next, a selector control circuit constantly detects the frequency component and level of the input data and selects the optimum LPF output.
This makes it possible to drive the D/A converter with 20-bit accuracy at all times.
An advanced high precision master clock is used as the master clock.
This oscillation circuit uses a discrete circuit to obtain a high-purity clock signal. This circuit is based on a Source Follower circuit and has a characteristic of gain less than 1, so it oscillates an accurate reference signal without amplifying external noise.
Equipped with digital servo, which is a digitization of servo.
This allows for more accurate pickup.
Separate windings of power transformers are used for digital and analog circuits to prevent mutual interference.
Uses OEIC pickup with built-in RF amplifier circuit.
Model Rating
| Type | CD Player |
| Reading system | Noncontact optical readout (semiconductor laser) |
| Number of revolutions | 200 rpm ~ 500 rpm (CLV) |
| Frequency characteristic | 4 Hz to 20 kHz (EIAJ) |
| Signal-to-noise ratio | 103 dB or more (EIAJ) |
| Dynamic range | 99 dB or More (EIAJ) |
| Total harmonic distortion factor | 0.002% or Less (EIAJ, 1 kHz) |
| Channel separation | 99B or More (EIAJ, 1 kHz) |
| Wow and flutter | Below measurement limit (± 0.001% W Peak, EIAJ) |
| Output Level / Impedance | Variable Output : 0 V ~ 2.0V/0.4k Ω |
| Headphone out | 20 mW (32 Ω) |
| Optical digital output | -15dBm ~ -21dBm (emission wavelength 660 nm) |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption (Electrical Appliance and Material Control Law) | 11W |
| External dimensions | Width 440x Height 127x Depth 270 mm |
| Weight | 4.3kg |
| Attachment | Remote control |