YAMAHA CDX-2020

Commentary

A CD player equipped with a 4 dac high bit system.

It uses Yamaha's high-bit system and achieves natural sound quality by obtaining smoother DAC output through high-precision digital arithmetic processing that goes beyond the basic CD format.
In addition, the adoption of a high-bit system enables pure DAC direct playback without passing through a low-pass filter, which had been considered essential in the past.

The digital filter uses an 8fsx20-bit digital filter to shift the sampling noise to a higher range and obtain high-resolution output.
The high-bit digital filter achieves an in-band ripple of ± 0.0001 dB and an out-of-band noise of less than -100dB due to the high-bit digital filter's high-precision digital calculation capability of 225 order + 41 order + 21 order and the characteristics of the digital filter itself. At 16-bit resolution, noiseless and rippleless digital performance is achieved.

The D/A conversion section has two 22-bit operation DACs per one channel. By mounting two 22-bit operation DACs per one channel, positive-phase and negative-phase signals are used to prevent noise contamination from the power supply circuit, achieving a high S/N ratio.
In addition to improving resolution, the 22-bit operation type also works as a kind of noise reduction circuit, greatly improving the S/N ratio at a very small level.

The power supply consists of a large 2-transformer configuration, and the power supply to the digital / servo system and audio system is independent, eliminating mutual interference.
In addition, the DAC and audio sections each employ a shunt regulator system with A-class operation, realizing low-noise, low-impedance power supply.

Pin-point support GP legs are used for the legs to shut out external vibration.

Equipped with newly developed digital emphasis circuit, high performance of 0.001 dB has been realized.

0.2 dB step digital volume is adopted.

Wireless remote control is included.

Model Rating

Type	CD Player
Frequency characteristic	2 Hz ~ 20 kHz + 0.2 -0.1 dB
Harmonic distortion factor	0.003% or less (EIAJ)
Signal-to-noise ratio	120 dB or more (EIAJ)
Dynamic range	100 dB or more (EIAJ)
Channel separation	100 dB or more (EIAJ)
Wow flutter	Below the measurement limit
Output voltage	2Vrms
Headphone out	280 mv ± 20 mv
Power supply voltage	100 VAC, 50Hz/60Hz
Power consumption	20W
External dimensions	Width 473x Height 132x Depth 392 mm
Weight	15.8kg
Attachment	Wireless Remote Control