KENWOOD DP-3050
¥ 34,800 (around 1993)
Commentary
CD player with the same technology as high-end models.
The D/A converter uses the same clock as the high-end model, and uses a high-precision master clock composed of an external discrete circuit. By preventing noise from the power and ground lines, the purity of the master clock is improved and the 1-bit D/A converter operates correctly.
In addition, to improve the S/N ratio in the audio band, a 0 shift noise shaper is employed to push the requantization noise out of the audio band, cut high-frequency noise, and enable higher-purity playback.
The AB-CLASS pickup actuator drive circuit is used for the pickup part.
If the actuator drive circuit that supports the conventional tracking motion (servo motion) is placed at the mid-point of operation, it becomes a reference point that causes discontinuous motion, and the ground potential is fluctuated from the inside by the actuator motion that enters through the ground, causing sound quality degradation.
The AB-CLASS pickup actuator driving circuit eliminates discontinuous operation at the mid-point of operation and reduces sudden generation of ground potential.
An RF phase equivalent compensation circuit is installed to prevent the signal read by the pickup laser diode from being out of phase due to AM/PM noise changes.
This circuit reconsiders the AM/PM noise wraparound and reduces the phase shift from low to high frequencies without losing the purity of the RF signal.
The output amplifier right after the D/A converter uses a cascade differential type to suppress secondary distortion in the range from 10 kHz to 20 kHz, thereby suppressing positive and negative phase output errors for each channel.
The servo circuit is equipped with super optimal servo control.
In this method, a preset error voltage is applied to the servo system so that when a disc is damaged, no extra force is applied to the pickup and the disc passes through the damage. Then a servocontrol is applied to trace the damage accurately. This method is robust against damage, oceanic whitetip shark, sound pressure vibration, and error generation is reduced.
Equipped with 8 x oversampling digital filter.
It uses an electric output volume that can control the output level with a remote control.
It also has a digital output.
Model Rating
| Type | CD Player |
| Reading system | Noncontact optical readout (semiconductor laser) |
| Number of revolutions | Approximately 200 rpm ~ 500 rpm (CLV) |
| Frequency characteristic | 4 Hz to 20 kHz (EIAJ) |
| Signal-to-noise ratio | 103 dB or more (EIAJ) |
| Dynamic range | 96 dB or more (EIAJ) |
| Total harmonic distortion factor | 0.002% or less (EIAJ) |
| Channel separation | 96 dB or more (EIAJ) |
| Wow and flutter | Below Measurement Limit (EIAJ) |
| Output Level / Impedance | Fixed Output : 2Vrms/1k Ω (EIAJ) Variable Output : 0 V ~ 2 V (1.1 kHz) |
| Headphone out | 20 mW (16 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) | 10W |
| External dimensions | Width 440x Height 107.5x Depth 262 mm |
| Weight | 3.7kg |
| Attachment | Remote control |