|99,800yen(around the 1990 time)
The cassette deck developed as a reference machine
of the new time which inherits the tradition of a Nakamichi.
possible to have adopted 3 head schemes which make a head for exclusive use take
charge of an erasure / sound recording / play, respectively, to be able to
optimize the form of a head, a material, and gap width, respectively, and to
drive in a property up until last minute.
It has the magnetic property near an ideal in the core of the recording head and the reproducing head, and Closter Roy excellent in the tone quality is used for it. Furthermore, by adopting a special structure, decrease of one side of a head was prevented and the long life is realized.
Moreover, the oxygen-free-high-conductivity-copper (OFC) line of top grade
is adopted as the coil of a head.
The new organization which can tune
the azimuth of the reproducing head finely by manual operation is carried, and
the point with which the best high region response is obtained during a play can
The frequency-dispersion type closed-loop double capstan is
adopted as a mechanism.
By this scheme, in order to avoid an enhancement of
the modulation noise by overlap of resonance frequency, by having adopted two
capstans and fly wheel from which a path differs, and also using vibrational
absorption material for a head base assembly, the oscillation was oppressed and
the ill effect to a tone quality is eliminated.
According to this structure,
the tapes pad for stabilizing the head touch with which the cassette is equipped
is unnecessary, and the original organization of a tapes pad lifter has
protected the modulation noise with a tapes pad.
The quality element was
used for sound-recording amplifier and play amplifier, and the dual
mono-construction which severs the interference between channels is adopted.
Furthermore, it has DC amplifier stream composition which eliminated the
coupling capacitor used as a distorted cause.
A sound-recording amplifier
circuitry is a pure Class-A, and has obtained the extremely stable operation. A
total of 12 regulation circuits of a recording level and bias level draw out the
capacity of a tapes by lower-right independency for every tapes position.
Moreover, a play amplifier circuitry is constituted only from a discrete
device, it is uniting with the reproducing-head assembly by the side of
transport, and the signal transmission loss by leading about of a cable is
The power circuit adopted every stage and the
multi-regurated power supply scheme which performs a powering independently for
every section, and has prevented crosses interferencee, such as noise mixing.
The silence mechanism of the motor drive by microprocessor control, a
tapes slack preventing organization, a bias fine-tune volume, a program check, a
MPX filter with a defeet, etc. are carried.
Dolbey B/C NR is carried as
Timer sound-recording / play organization is carried.
||Stereo cassette deck
||Sound recording: R-3L recording head
Play :P 2H-3L reproducing head
Erasure: E-4F erase head
||For a capstan drive: DC servo motor
a reel drive: DC motor
For a cam drive: DC motor
|Wow and flutter
||±0.06% or less WTD Peak (EIAJ)
less WTD RMS
||20Hz-21kHz±3dB (recording level -20dB,
TypeI/IBM PCN II/IV, EIAJ)
|S/N ratio (70 microseconds, TypeIV)
||DolbyNR B on: 66dB or more (400Hz, 3%THD,
IHF A-WTD RMS)
DolbyNR C on: 72dB or more (400Hz, 3%THD, IHF A-WTD RMS)
|A comprehensive distortion
||0.8% or less (400Hz, 0dB, TypeIV)
or less (400Hz, 0dB, TypeI/IBM PCN II)
||37dB (1kHz, 0dB, EIAJ)
||60dB or more (1kHz, 0dB, EIAJ)
||60dB or more (100Hz, +10dB)
||Line: 50mV / 40kohm
|An Output voltage/impedance
||Line: 0.5V / 2.2kohm (400Hz, 0dB,
Output-voltage volume maxima)
Headphone: 5.0mW/eight ohms (400Hz, 0dB,
Output-voltage volume maxima)
||A maximum of 25W
||Width 430x height 100x depth of 320mm (EIAJ)