NEC CD-816

Commentary

A CD player developed by putting in the technology obtained with the CD 830 ds.

Equipped with a 16 fs T. F. C. (Transversal Filtering Circuit), the sampling frequency is shifted up 16 times to 705.6 kHz by high-precision digital calculation, and the digital noise is shifted to the ultra-high frequency to obtain a smooth waveform.
As a result, the analog filter in the latter stage becomes a simple second order passive type compared to the conventional one, and the passband is expanded, and element distortion and phase distortion are greatly improved.

The D/A conversion section uses a 4 dac B. S. S. (Balanced Summing System) balanced conversion circuit.
This circuit consists of a balanced conversion circuit using two Lch and two Rch D/A converters selected specifically for the accuracy of small levels from among the DACs selected for good linearity. This increases the dynamic range of the auditory sense and improves the accurate representation of pianissimo and clarity of silence.
By balancing unipolar DACs, the analog signal path is simplified by eliminating the need for a coupling capacitor.

The power supply circuit uses a large transformer and OFC power cord to obtain excellent regulation. In addition, the digital and analog circuits are separated, and the filter is composed of high-quality capacitors to prevent noise contamination.

The mechanism mounting base of the chassis is composed of a material with high rigidity and excellent vibration resistance. In addition, a double structure bottom plate is adopted in which 1.6 mm thick steel plate is added to the usual 1 mm thick bottom plate, and vibration from inside and outside is reduced.
In addition, a sintered alloy leg (φ 63.5 mm) is adopted for the insulator, making it possible to use an interview site or 3-point grounding.
In addition, special anti-vibration materials are used to dump important parts.

Equipped with an absolute phase (signal polarity), the signal polarity of CD can be selected and changed to match the polarity of the whole system.

Equipped with digital output (coaxial / optical).

In addition to the digital fade-out function, auto-edit function, manual edit function, auto-space function, and performance time editing function such as display of music within remaining time, it is equipped with functions such as delete program playback, random play, intro-scan, 24-track random program memory, 3-mode repeat of all songs / programs / A-B, time search, track search, index search, 2-speed music search, and power on start.

It is equipped with a large display with a music calendar with 3 levels of brightness.

Equipped with a headphone port with volume.

Wireless remote control is included.

Model Rating

Type	CD Player
Frequency characteristic	5 Hz to 20 kHz ± 0.5 dB
Total harmonic distortion factor	Not more than 0.0018%
Dynamic range	98 dB or more
Signal-to-noise ratio	105 dB or more
Channel separation	103 dB or More (1 kHz)
Wow and flutter	Measurement limit value or less (crystal oscillation accuracy)
Output level	Analog : 2.5 Vrms Digital : 0.5Vp-p/75 Ω (Coaxial)
Pwer	100 VAC, 50Hz/60Hz
Power consumption	19W
External dimensions	Width 430x Height 110x Depth 290 mm Width 430x Height 129x Depth 306 mm (max)
Weight	8.5kg
Attachment	Wireless Remote Control AR-816