Audio Database

CD-94
Commentary

This CD player was developed based on the development results and research results from the first CD player, the CD-63 to the LHH2000.

Equipped with TDA1541, a 16-bit D/A converter LSI that operates with 4 x oversampling, all digital decoders are made to be 16-bit. The TDA1541 is equipped with two D/A converters for Lch and Rch in the chip LSI, eliminating the phase shift between right and left.

The mechanism part is tuned up with the CDM-1 mechanism which is also used for professional CD players.
By separating and separating the pre-amplifier for the laser signal which had been mounted in the mechanism in the past, the pre-amplifier circuit is freed from the microvibration of the rotary system. Furthermore, the circuit itself is also pursued in large scale and sound quality.
In addition, reinforcing ribs have been added to the mechanism unit by aluminum die-casting to increase rigidity.

The digital circuit, audio circuit, servo circuit, microcomputer and display circuit are each composed of independent circuit boards. The layout is designed to eliminate noise while suppressing mutual interference.

The power supply section uses a large transformer and a custom electrolytic capacitor of 68,000 μ Fx2. The secondary winding of the power supply transformer is divided into four sections for digital circuits, audio circuits, servo circuits, and display circuits. These sections are independent of each other to prevent noise from the power supply section. The regulator circuit is also made discrete to reduce noise from the power supply section itself.

A die-cast chassis is used for the chassis and combined with an integrally molded aluminum pull-out top cover to increase the weight and rigidity of the body.

CD Filing Bank Contains FTS (Treasure Track Selection) for permanent storage of programs, automatically determines which CDs are programmed, and plays the stored programs on each CD.

Almost all operations are possible with the included wireless remote control.

Equipped with shuffle play shuffle play, program playback of up to 20 songs, repeat mode of FTS / shuffle / program / A-B / one song / all songs, AMS function to play the heads of songs one after another, timer play, etc.

It has a headphone port.

The digital output terminal is coaxial with the optical output terminal.

Model Rating
Type CD Player
Sampling frequency 44.1kHz
Quantization 16-bit linear / channel
D/A converter 16-bit 4 x oversampling digital filter
L/R Independent 2 dac
Filter Third order Bessel filter
Channel 2 Channel
Frequency characteristic 2 Hz to 20 kHz ± 0.1 dB
Dynamic range 96 dB or more
Signal-to-noise ratio 104dB(1kHz)
Channel separation 100 dB or More (1 kHz)
Total harmonic distortion factor 0.0015% (1 kHz, THD)
Wow flutter Crystal accuracy
Error correction system CIRC
Analog output 2Vrms
Digital output Coaxial : 0.5Vp-p/75 Ω
Optical : fiber connectors
Laser AlGaAs semiconductor
Wave length 800nm
Pwer 100 V, 50Hz/60Hz
Power consumption 30W
Maximum external dimensions Width 462x Height 104x Depth 355 mm
Weight 10.3kg
Attachment Wireless Remote Control RMC-94