DENON DCD-1630/DCD-1630G
¥ 79,800 (released in 1989)
Commentary
A CD player with a real 20-bit Λ (lambda) S. L. C (super linear converter).
Real 20-bit Λ S. L. C is mounted on the D/A conversion part.
In this circuit, digital data is divided into two systems by LAMBDA (Ladder-form Multiple Bias D/A) method using newly developed LSI. Digital bias is applied in plus and minus directions near the 0 cross point to shift, and in principle, the 0 cross distortion is eliminated.
As a result, at a low level, the digital data is processed at the digital data stage and converted into data without 0 cross distortion, and then D/A converted. Therefore, 0 cross distortion does not occur, and even if there is bit distortion, the distortion is reduced to 1/2 by the average of the two signals. In addition, at a high level, distortion may occur because the signal crosses the 0 cross point, but it is removed by the MSB correction of the super linear converter. In addition, at a momentary peak level (approximately 99.6% or more of the maximum level) that is almost absent in one piece of music, LAMBDA eliminates shift operations and uses the converter's dynamic range to the maximum extent to ensure a wide dynamic range.
The digital filter uses a 20-bit 8-times oversampling digital filter improve resolution, reduce requantization noise, and improve phase characteristics.
The analog circuits are independent on the left and right sides to prevent channel interference.
The pick-up section is strongly supported by structured Mechanical Fix Bracket corresponding to the BMC Mechanical Chassis in the DCD-3500 series.
In addition, the center of gravity is reduced by adopting a double structure in which a special viscoelastic sheet is sandwiched between two upper and lower steel plates for the top cover and a thick chassis with a triple structure for the bottom chassis.
Also, the top cover, which is easily affected by external vibration, is fixed with 4-point stops.
You can adjust the brightness of the display in 4 levels.
It is equipped with a remote control electric volume that can be used for headphones.
Equipped with a digital output.
Equipped with auto-edit / auto-space functions convenient for tape recording.
It is equipped with functions such as random play and program play of up to 20 songs.
There are 2 color variations of gold and black.
Wireless remote control is included.
Model Rating
Type | CD Player |
D/A conversion part system | Real 20-bit Λ Super Linear Converter (Double D/A converter type) |
Filter | 8 x oversampling digital filter Active analog filter |
Frequency characteristic | 2 Hz to 20 kHz |
Signal-to-noise ratio | 113dB |
Dynamic range | 100dB |
Total harmonic distortion factor | 0.002% |
Channel separation | 105dB |
Interchannel phase difference | 3 degrees or less |
Output voltage | Fixed : 2 V / (at 10k Ω load) Variable : 2 V (at 10k Ω load) |
Headphone jack | Maximum output 10 mw (at 32 Ω load), Line variable output combined with Volume |
Power supply voltage | 100 VAC, 50Hz/60Hz |
Power consumption | 14W |
External dimensions | Width 470x Height 122x Depth 320 mm |
Weight | 10kg |
Attachment | Wireless Remote Control RC-217 |