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What is stereo?




There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.




H.H. Scott '59





Hitachi DA-1000 (1983)

Hitachi has crossed the threshold of a music lover's dream. Perfect concert reproduction is now a reality. It is all possible due to the new Hitachi DA-1000, one of the world's first commercially available visual audio disc players, it is an exciting new form of sound system that relies on digital audio signal encoding rather than an analog system. This allows performance levels that far exceed even the finest conventional turntable. The result is pure, clean sound absolutely faithful to the original performance.

The Hitachi DA-1000 plays compact digital audio discs, the disc format adopted by all on the major audio manufacturers. A compact disc is capable of storing an uninterrupted 60 minutes of beautiful music on a single side.

The digital disc is perfectly smooth, its clear plastic protective surface eliminates the annoying effects of dust, scratches and wear. The music you hear will sound exactly the same as when the artist originally recorded it, the first time you play the disc as well as the 1000th.

The DA-1000 was cratted to ensure superior performance as well as optimum convenience. The vertical design offers the space saving benefits of component rack installation, as well as the ease of a cassette-style front loading system. The DA-1000 delivers a comprehensive playbac control, with a simple touch of the user may elect to pick-up Forward or Reverse,cue, Repeat and Auto Search. The DA-1000 also has the Program Playback a feature which allows the user to program up to 15 selections for playback in any sequence automatically.

One listen is worth a thousand words. Come and witness for yourself the superior sound of the Hitachi DA-1000.

Features Function

Random memory search (max. 15 track)

Sejl-program search system

Skip play, memory stop, pause, reaeat, output volume

Variable level headphone jack,

2 sets output terminals (variable and fixed level)

Conecting pin cords

Displays:

Play position (5 min. steps), number of tracks, playing track number, elapsed play time, output volume level.

Specifications

Number of channels: 2 (stereo)

Disc diameter: 120 mm

Max. playing time: 60 min. /one side

Frequency response: 5 Hz - 20 kHz, ±0.5 dB

Dynamic range: 93 dB

Signal-to-Noise ratio: 94 dB

Total Harmonic Distortion: 0,003%

Separation: 92 dB at 1 kHz

Wow and Flutter: less than measurable limits (crystal accuracy)

Output voltage: 2.1 V RMS (with full scale)

Sampling frequency: 44,1 kHz

Quantization number: 16-bit linear/channel

Transmission bit rate: 4,3218 Mb/sec

Pick-up system: object lens drive system optical pick-up

Object lens drive system: Two-dimensional parallel drive

Optical source: Semiconductor laser

Wavelength: 790 mm

Power requirements: 120/220/240 V, 50/60 Hz

Power consumption: 25 W - 28 W

Dimensions (W x H x D): 320 x 145 x 234 mm

Weight: 5,6 kg