|2,000,000yen(one-set, around the 1996 time)
Highest-class monophonic power amplifier which adopted the UHC single push pull
In order to unify the two poles of "delicacy" and
"forcibleness" at a high dimension, a large current type element and UHC MOS are adopted for the first time in the audio circuit.
It is improved more than a
bipolar transistor and gm (amplification factor) makes possible 35 pieces of MOS
FET currently generally used, and the current linearity for three pieces of the
bipolar transistor with one element.
This has completed the single push pull
circuit which bears the large current corresponding to low impedance load.
Cascode bootstrap connection is adopted and the magnitude of junction
capacity is solved by always making voltage concerning UHC MOS regularity.
Furthermore, since high temperature stability was also realized, it was not
based on a severe operating condition, but the acoustic feature which UHC MOS
has is made use of.
furthermore -- without it applies a burden to a voltage
magnification stage by this circuit -- simple & of two steps of voltage
magnification stages, and one step of electric power magnification stages --
straight composition is gained.
The output circuit part has realized
operation stabilized by the UHC single push pull circuit.
thing for which the coil of sauce resistance and an output circuit is eliminated
-- more -- high -- purity transmission is enabled.
Since the Oide power
is acquired with low power supply voltage by adoption of a BTL circuit, adoption
of the outstanding device for sound is possible.
Moreover, full separation
of the ground circuit and speaker Output voltage used as a standard of operation
was carried out, and the bad influence to a music signal is eliminated.
In the power-source part, by carrying out two-piece parallel connection
of the large-sized toroidal transformer, a transformer's own impedance is
further reduced by half, and current supply capacity is heightened.
Moreover, the internal vibration is thoroughly eliminated by development of
the open type toroidal transformer which removes an upside case.
UHC power supply circuit, loss voltage is sharply reduced by using the large
current element UHC MOS.
About 40% of Schottky barrier diodes, the current
loss of UHC MOS is equivalent to about 20% of common silicone diodes (10 A:00), and is carrying out possible [ of the 240A thing current supply ].
order to realize perfect oscillating deterrence of a large-sized
toroidal-transformer and power radiator, it is the Oshige quantification of a
chassis,Direct mechanical grand structure was adopted, two large-sized toroidal
transformers and heat sinks were directly fixed to the foot, and influence is
eliminated by not giving other circumference circuits and a common oscillating
||Monophonic power amplifier
||1400W (1 ohm, 1kHz, THD 0.5%)
ohms, 1kHz, THD 0.5%)
500W (4 ohms, 1kHz, THD 0.5%)
250W (8 ohms, 20Hz -
20kHz, THD 0.05%)
||0.008% (20Hz - 20kHz, 8 ohms,
|Cross modulation distortion
||0.003% or less (7kHz : 60Hz = 1:4 or 8 ohms,
||5Hz - 50kHz (THD 0.05%, 8 ohms,
||1Hz - 300kHz (at the time of 8 ohms and 1W
|Output load impedance
|Signal to noise ratio
(A curve waiting)
|Speaker output terminal
||1ohms or more
|Power supply voltage
||Width 483x height 273.5x depth of 683.5mm