|250,000yen(around the 2000 time)
The Integrated Amplifier which attained high-quality sound-ization by the
injection of the further amount of resources inheriting the basic composition of
Large current type magnification element UHC-MOS with 3 to 10
times [ usual ] as many current supply capacity called peak current 120A is
adopted as an output stage. This UHC-MOS is adopted in a single push pull
circuit, and coexistence of high power and delicate power of expression is aimed
The toroidal transformer with a large-sized magnetism circuit is
adopted as a power transformer. The flattery nature to the music signal is
improved by performing the design which has a large dynamic range to a magnetic
saturation domain. Moreover, in order to solve the problem of vibration which
was a weak point of the toroidal transformer, the method of fixing the S.B.
(Stable Based) system which uses an aluminum sand casting case is adopted.
Furthermore, the mutual intervention between each circuit is suppressed by
becoming independent about the winding wire of the power source of a voltage
magnification stage or a phone equalizer, and making the transformer of the
control circuit power source which controls a signal relay etc. become
Each of the volume circuit, the tone circuit, and the power
amplifier circuit was improved, and the maximum of the frequency response at the
time of real use is improved to 100kHz. Furthermore, the noise generated within
amplifier at the time of real use is stopped by improving a volume circuit.
The first Schottky barrier diode to be developed for high frequency
rectification as a power amplifier power source of a mass-production model is
carried in the rectifier circuit by parallel connection. The low-noise
characteristic by high-speed operation and the outstanding large current
characteristic have realized the low-noise, low loss, and improvement in the
speed of a power supply circuit.
Furthermore, the combination of the
electrolytic condenser which uses low impedance electrode foil, and the
capacitor by which frequency responses differ has realized current supply
stabilized in all the zones of play frequency.
Moreover, the OFC wiring
material of a very thick is used for wiring from a power transformer output to a
power amplifier output stage.
In order to suppress sound quality
degradation by the mutual intervention between circuits, or inflow of a noise,
the twin monophonic composition which became independent by right and left about
the power amplifier block is adopted, and also the circuit where signal levels
differ is also separated, and it is considered as 6 block structures which put
cover into practice.
Moreover, in order to suppress generating of the noise
by vibration, while using the sheet steel with a thickness of 1.6mm which
performed black paint for a chassis and improving rigidity, equalization of the
temperature in a chassis is attained.
The sintered alloy insulator who changes vibration into heat at an insulator and reduces vibration on a chassis is employed. Furthermore, the effect is heightened by sticking the material which absorbs vibration.
Furthermore, various oscillating measures, such as an
improvement of how a power amplifier circuit / power radiator should cling, and
formation of a six-point stop of a top covering heavens side, are taken.
brass shaving appearance of the speaker terminal is carried out, it
plates with gold at a part, and is reducing the transmission loss. Moreover, the
bore diameter of a clamp part is made large-sized with phi6mm, and
correspondence to a very-thick speaker cable is aimed at.
Those with two
line and bi-wiring connection are also possible for a speaker terminal.
In order to reduce inflow of noise current, such as a constant current
circuit, to the grand circuit used as the origin/datum of signal magnification,
the Precision Signal Ground circuit is carried.
The phone equalizer
which adopted the first rank circuit of discrete composition of having used
low-noise FET is carried. High-quality sound-ization is attained by the
regulated power supply only for a phone equalizer.
Moreover, the cartridge
of both of MM/MC is supported by the change of a switch.
40 type 4-unit
volume -- large-sized shaving appearance was carried out, a gilding pin jack,
OFC internal wiring material, the inactive gas enclosure type relay, the
high-quality sound capacitor, the attachment-and-detachment type very-thick
power cord, etc. are adopted, and the SILMIC II electrolytic condenser is
|<Power amplifier part>
(Both channel drive, CD->SP out)
|100W+100W (8 ohms, 20Hz - 20kHz, THD 0.07%)
200W+200W (4 ohms, 1kHz, THD 0.7%)
||0.01% (Output-power-3dB o'clock, 8 ohms,
||Speaker AorB: 4ohms - 16ohms
At the time of bi-wiring: 4ohms - 16ohms
||Line: 150mV/47kohm (Source Direct off)
150mV/15kohm (Source Direct on)
Phono MM: 2.5mV/47kohm
|Equalizer amplifier output
||Phono MM: 20Hz-20kHz}0.5dB
||5Hz-100kHz+0 -3 dB
|Signal to noise ratio
(A network, an
input short circuit)
Phono MM: 91dB (at the time
of a 5mV input)
Phono MC: 76dB (at the time of a 0.5mV input)
||Bass: }8dB (100Hz)
Treble: }8dB (10kHz)
||switched: Two lines, a total of 120W
unswitched: One line, 240W
|Power supply voltage
|Dimensions (a base, a knob, a terminal
||Width 434x height 181x depth of 485mm