Nakamichi CDPlayer2

Commentary

CD player using music bank system.

It uses a unique music bank system to enable multiple disc playback without sacrificing sound quality or operability.
The Music Bank System is equipped with a CD stocker inside and can store up to six CDs. Therefore, a total of seven CDs can be played together with the discs on the tray. This unique structure makes it possible to play a single CD with the same operability as a normal CD player. It also eliminates the mechanical noise and clumsy movement seen in the magazine system.

A total of 7 discs can be played continuously, 50 songs can be stored, and 7 discs can be played at full random.

A magnetic chucking type disk stabilizer is mounted on the tray part to suppress the influence of external vibration and to damp the resonance of the CD itself.

The digital filter uses an 8 x oversampling digital filter.
The analog filter is a third order linear phase Bessel type analog filter.

The D/A converter uses an EL (Enhanced Linearity) 20-bit D/A converter that simultaneously pursues multi-bit and improved conversion accuracy.
With EL20-bit, the 20-bit data sent from the digital filter is recomputed and converted into two sets of 16-bit data, one set of high-level signal data and the other set of low-level signal data based on -24dB. These data are processed separately by two D/A converters for each channel. After the D/A conversion, these data are combined. Low-level signals below -24dB are digitally amplified 16 times, converted into analog signals, and returned to 1 / 16th level before being combined with the output of another D/A converter.
As a result, for low-level signals, in which 80% to 90% of music signals are concentrated, the conversion accuracy is 16 times higher than that of a normal 16-bit D/A converter, which truly compensates for 20-bit accuracy.

The CDPlayer2 uses a newly developed high-stability servo system that is resistant to disc scratches and improves signal pickup capability.

The RF amplifier is placed not on the main board but on the pickup transport unit side, and the transmission path from the optical pickup to the signal processing circuit is greatly shortened to improve the sound quality.

Equipped with a digital de-emphasis circuit, it eliminates distortion factors such as switching circuits that are seen in analog systems.

Multi-regulated power supply system is adopted for the power supply section, and power is supplied independently for each circuit section.
In addition, the isolated ground method is adopted to prevent noise contamination between the digital circuit and analog circuit surrounding the ground line.

Equipped with a delete play function that can cut out songs you don't want to listen to.

It is equipped with a 3-way random play function of all / delete / program. It is also equipped with a 3-way repeat function of all / delete / program.

It is possible to record CD synchronized with Nakamichi's deck.

Single mode supports 8 cm CD.

Equipped with a digital output terminal.

The line output and headphone output are equipped with an output level control function by motor volume.

Wireless remote control is included.

Model Rating

Type	CD Player
Reading system	Non-contact optical (semiconductor laser used)
Error correction method	CIRC method
Number of channels	2-channel stereo
D/A conversion method	20-bit Dual D/A converter
Digital filter	8 x oversampling digital filter
Sampling frequency	44.1kHz
Quantization	16-bit straight line
Disk rotational speed	Approx. 200 ~ 500 rpm (Constant Linear Velocity)
Wow and flutter	Below the measurement limit
Frequency characteristic	5 Hz to 20 kHz ± 0.5 dB
Signal-to-noise ratio	105 dB or more (IHF A-WTD)
Dynamic range	100 dB or more
Total harmonic distortion factor	0.0035%(1kHz)
Total harmonic distortion factor + noise	0.004%(1kHz)
Channel separation	100 dB or more
Output (1 kHz, 0 dB)	Line (fixed) : 2.0V/600 Ω Line (variable) : 2.0V/600 Ω (maximum output level) Headphone : 60 mW (40 ohm load, maximum output Leve)
Accessory function	Digital de-emphasis circuit Memory Play Delete play Random play Synchronized recording Disk scan Time data memory Repeat play System remote terminal
Pwer	100 VAC, 50Hz/60Hz
Power consumption	Up to 23W
External dimensions	Width 430x Height 100x Depth 375 mm
Weight	Approx. 8.0 kg
Attachment : Remote Control Unit CDPlayer2 Remote Control
Method	Infrared pulse type
Pwer	DC3V(1.5Vx2)
External dimensions	Width 60x Height 18x Depth 180 mm
Weight	Approx. 130g (Including Battery)