|80,000yen(around the 1976 time)
It is the power amplifier of Feature series.
monophonic construction which constituted the power source according to
right-and-left channel and two sets of monophonic amplifier on the same chassis
For this reason, the mutual intervention from a power source was
suppressed and the separation between channels is improved sharply.
3 steps of symmetrical complimentary Darlington OCL circuit and the 2 steps of
differential amplification current mirrored live system are adopted.
distortion is possible by the three-step Darlington circuit where direct-current
current gain is large, and using few current mirror circuits possible [ an
object drive ] and distorted by high gain.
By combining the transistor
which was excellent in the current mirrored live and the high frequency
characteristic, the improvement of the standup characteristic of a pulse and the
distorted characteristic of a high region is aimed at.
transformers of 200VA and two capacitors for power sources of 63V or 10000-micro
Fx2 are used for a power supply circuit.
The huge heat sink of 0.35
degree C per channel/W is attached outside.
A cooling effect becomes very
high by this, and the junction temperature of a power transistor can be stopped
low enough, and can be used.
High reliability is conjointly secured with the
parallel push pull of the power transistor of Pc=100W.
The relay for
protection is used for the change of a speaker as it is.
Since there is no
conventional speaker changeover switch by this, there is no fall of the dumping
factor by the contact resistance of a speaker changeover switch.
with the preamplifier of Feature series is possible, and remote control by a
preamplifier is possible.
||Stereo power amplifier
|20Hz - 20kHz :
|Music power :
|EIAJ (distorted 5%) :
|At the time of an Output power :
|At the W (20Hz - 20kHz) time of one :
|Output power (-3dB, 1kHz) :
|Cross modulation distortion (1W,
|Frequency response (0.5W, -0dB one dB)
||10Hz - 100kHz
|Output bandwidth (IHF 0.1% distortion)
||10Hz - 50kHz
|Conformity load impedance
|Electrical Appliance and
Material Control Law :
|Output power (8ohms) :
||Width 425x height 170x depth of 285mm