|300,000yen(around the one-set and 1980 time)
Unreturned monophonic power amplifier which removed the NFB loop from the signal system by the super linear circuit.
The super linear
circuit is adopted as a voltage amplification part.
The linear amplification
was realized without using NFB because this cancels the nonlinearity of a
transistor with a transistor with the nonlinearity in the reverse mode, and the
problem resulting from NFB is solved.
EBT (ensemble power transistor)
with a high-speed responsibility is adopted as an output stage.
In order to
obtain a linearity, the electric-current burden per one stone is made light, and
it is parallel six pieces, and is used, and pure class A amplification is
carried out. The high region play which tends to pose a problem by this has also
In order to attain DC stabilization of an outputting point,
the double locked servo regulator who suppresses a variation of a middle point
voltage and improves the robustness of a super linear circuit further is
Furthermore, it has the whole page hardwired-connection stream
composition which removed the coupling capacitor constituting the cause of
coloring of sound.
Two power transformers are used for a power-source
part, and source impedance is reduced by equivalence parallel connection, and
also the power-source drive to an output stage is strengthened.
to remove the factor of a tone-quality failure, the glasscase electrolytic
capacitor which changed the case into the glass from conventional aluminum is
adopted. High-quality sound-ization is attained more by giving a carbon coating
to a glasscase inside, and also adding an enhancement to electrode foil.
Moreover, the Copper-foil styrene capacitor which uses oxygen free high
conductivity copper of a high purity for electrode foil is adopted as the
capacitor of a small capacity, and the improvement in a tone quality is aimed
It changed to the iron cap, the brass cap carbon resistor which
adopted brass cap carbon as the drawer part is adopted as a carbon resistor, and
the distorted occurrence is suppressed.
Equalization of the shielding
effect is attained by using the aluminum material which is non-magnetic material
for all, such as a chassis and a frame, and also coating a special resin inside.
By these non-magnetic-material structuring, the failure of the biography
trouble and property resulting from a magnetic-substance structure is reduced
To the printed circuit board, a mechanical intensity is high, and the glass epoxy which was excellent in the RF property is adopted.
Furthermore, the Copper foil is made to reduce direct current resistance and an
inductance by giving one about 4 times [ over the past ] thickness of 140micro
Moreover, oxygen free high conductivity copper is adopted as the
place which uses oxygen free high conductivity copper for the product-line
material of a signal system in addition through which a signal flows, or
The protection network which detects the bads of an
overload, a middle point voltage, and also supply voltage is adopted.
Thereby, when a middle point voltage carries out an unusual transition
according to the outage of short-circuit of a speaker termination etc., a
speaker and power amplifier are separated in an instant.
Moreover, at the
time of on/off of a power switch, it operates as a muting circuit.
light emitting diode window indicator of 20 points by a microcomputer is adopted
as the power indicator of a whole surface panel. Peak value is directed without
a range change even for 0.001W to a maximum of 100W using a logarithmic
Moreover, it has a peek hold facility and reading of
peak value is also possible.
The large capacity power supply cord
insulated doubly is adopted as a power cord.
Furthermore, since the polarity
is unified from a power-cord core line to the internal circuitry of C-Z1 and
M-Z1, AC line and a polar matching can be aimed at.
The pin plug code
has adopted the star-quad structure which used oxygen free high conductivity
copper for the material. Thereby, the self-inductance of the code was reduced
and the flat transmission characteristics has been acquired to the high region
by the low loss.
||Unreturned monophonic power amplifier
|Effective output (20Hz - 20kHz)
(20Hz - 20kHz, 8ohm)
|80 or more
||220W (Electrical Appliance and Material
||Power-switch un-interlocking.: One line,
||Width 220x height 185x depth of 440mm