|89,800yen(September, 1978 release)
The Integrated Amplifier which investigated the
quality of all fields, such as a performance side, an organization side, a
functional side, and a design side, and was developed.
amplifier part has adopted DC amplifier stream composition which removed the
time constant circuitry in the NFB loop which is one of the causes which worsens
a transient response. Moreover, about the problem of the drift over a variation
of external requirements, such as supply voltage and a temperature, for every
main point, an electric and an organization device are given and are suppressed
on the level which can be disregarded.
To the power transistor, the
destructive-proof intensity selected carefully highly what has high high region
cut-off frequency, and EBT (emitter ballast and transistor) is adopted as a
driver transistor. Furthermore, the stable high region property with little
notching distortion is realized for the pre-driver stage a constant voltage and
by carrying out a constant current drive.
hardwired-connection equalizer circuitry, the two-step hardwired-connection flat
amplifier circuitry, and the two-step hardwired-connection tone amplifier
circuitry are adopted as a preamplifier part.
In order to attain further
more much more low-distortion-izing and high SN ratio-ization, while carrying
out the careful selection using of the super-low-noise type with few collector
output capacitances with a linear region improve a circuitry fundamentally and
large to a using transistor, and high and high region cut-off frequency,It
drives with a negative power source, the electric current of many of Japanese
predefinedpredefineds is further sent through each circuitry, and low
impedance-ization is attained.
The large-sized Troy Dahl power
transformer is adopted as a power-source part.
Moreover, a preamplifier
part, the predrive stage, and the power stage are another formulated, the
efficiency ratio of a power source is raised, and the improvement in a
distortion property is aimed at.
In order to advance positively
shortest-distance-izing from each input terminal to an amplifier circuitry, and
exclusion of shielding wire and to aim at the improvement in a performance, it
is dared to form the input terminal plate in the bottom.
the LUX scheme
NF type is adopted as a tone control, and also the object for high regions and
the method of low-pass have prepared the curving point frequency switchover 2
points every. A defeet is also possible for this tone control.
filter circuits, such as a Subsonic Filter, a low cut-off filter, and a high
cut-off filter, a monitor & dubbing functionality, a speaker selector, a
loudness control, -20dB audio Attenuator, etc. are carried.
using of a preamplifier part and a power amplifier part is possible.
|Succession effective output
(both channel operation)
|60W+60W (8 ohms, 20Hz - 20kHz)
|THD (20Hz - 20kHz)
||0.02% or less (8ohm, 60W)
|Cross modulation distortion (60Hz:7kHz=4:1)
||0.02% or less (8ohm, 60W)
||10Hz - -80kHz three dB (8 ohms, 0.05%)
||Phono1, less than [ 2:20Hz-20kHz}0.4dB ]
Tuner, Aux, Monitor1, 100kHz [ 2:10Hz - ]-less than 1dB
Main in: 100kHz
[ 10Hz - ]-less than 1dB
Main in: 1.25V/50kohm
|SN ratio (IHF-A correction)
|Phono1, 2:80dB or more
Monitor1, 2:100dB or more
||70 (an 8-ohm load intensity, 1kHz)
||With a curving [ LUX scheme NF type ] point
frequency switching (defeat is possible)
The point curving [ low-pass ]:
The point curving [ high region ]: 2kHz, 4kHz
||Subsonic speed: 15Hz-6dB / oct
cut: 70Hz-6dB / oct
A high cut: 7kHz-6dB / oct
||The speaker protection network by DC
Overcurrent preventing circuitry
Audio Attenuator (-20dB)
Tapes monitor & tapes dubbing circuitry
Rec out off-switchpoint
Time muting-circuit & indicator
||Power-switch interlock: One line
Power-switch un-interlocking.: One line
(Electrical Appliance and Material Control Law)
||Width 438x height 105x depth of 313mm