Sunday, 16 December 2012

Marantz CD-7 450,000yen(around the 1998 time)


The flag ship model of the compact disk player which collected the technical essences which have cultivated the Marantz and was developed.

In a D-A-conversion part, TDA1541AS2 (double crown) is constituted from a dual differential, and the conversion accuracy is raised, and also a DSP technology original with a Marantz is supplied, and newly developed 3 mode changeover type digital filter is carried.
In compact-disk-7, the digital input is prepared and it can use also as a digital analog converter corresponding to 3FS (32k, 44.1k, 48kHz).

compact-disk7 of digital-servo IC and die-casting mechanism VAM1252 are adopted as the mechanism part.

HDAM which is a high-speed voltage amplification module original with a Marantz is adopted as all the analog stages at the analog part.

The super ring toroidal transformer which is efficient and has little leakage magnetic flux is adopted as a power-source part.

A die-casting chassis is adopted as a chassis and the oscillation is suppressed.

Noise shaper ON/OFF yesterday is carried.

Aluminum top wireless remote control is attached. 

Form Compact disc player
Channel Two channels
Frequency characteristic 20Hz - -20kHz 1.5dB
Dynamic range 97dB
SN ratio 104dB
Channel separation 100dB
Wow and flutter Quartz-crystal precision
Error correcting system Cross interleave reed-solomon code (cross interleaved Reed-Solomon code)
Analog output Unbalance: One line, 2.2V
Balance: One line, 4.4V
Digital output Coaxial: One line, 0.5 Vp-p/75ohms (pin jack)
Light: Two -19dBm (square-shaped light connector)
Digital input Coaxial: One line, 0.5 Vp-p/75ohms (pin jack)
Light: One -19dBm (square-shaped light connector)
Laser AlGaAs semiconductor
Wavelength 780nm
Sampling frequency 32kHz, 44.1kHz, 48kHz
Quatization A 16-bit linear / channel
Permissible operating temperature + 5 degrees C - +35 degrees C
Permission operation humidity 5% - 90% (there needs to be no dew condensation)
Supply voltage AC100V, 50Hz/60Hz
Power consumption (Electrical Appliance and Material Control Law) 22W
The maximum Dimensions Width 454x height 118x depth of 333mm
Weight 16.0kg
Adjunct Remote control: One set
Battery: One pair
AC code: One
Audio cable: One pair

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