|ONKYO Integra A-917R
|90,000yen(around the 1993 time)
No. 3 of A-917 series which is a version of the 90s
of A-817 series.
Technologies, such as newly developed constant current bias
amplifier and a flat dumping technology developed in the QUEST serieses, are
supplied, and much more improvement in a tone quality is aimed at.
order to realize a highly precise amplification, constant current bias amplifier
In order for this circuitry to improve the precision of the
differential amplifier, the overly highly precise constant current circuit was
adopted as the bias circuit used as criteria of operation, and it has succeeded
in raising a supply voltage variation supression ratio (SVRR).
current circuit consists of a flume detour way stream composition which
stabilizes the criteria of a highly precise returned type constant current
circuit of operation in another constant current circuit,Furthermore, the
voltage amplification with very high stability is realized by adopting this
constant current circuit also as the bias circuit of a first rank cascode or the
2nd step cascode, and the 2nd step constant current load intensity.
Furthermore, the filter circuit of a low-impedance is carried in the power
source of a voltage amplification part by the right-and-left independency, and
the interference by the supply voltage variation by the ripple of a power source
or the load current at the time of the Oide power and a power supply variation
on either side etc. is reduced sharply.
The flat dumping technology
developed in the QUEST serieses is supplied, and it has succeeded in abolition
of an output coil by considering it as more stable circuitry, such as a new
phase-correction scheme and adoption of a low Cob transistor.
failure of the dumping factor in a high region was lost, and the drive
independent of the form of a speaker and a property is realized.
high linearity driver transistor which has the property which was very excellent
to the large-current area in a driver transistor is adopted, and drive capacity
The newly developed blue capacitor is carried in the
power-source part. Moreover, a mass type is adopted also as a bridge or diode and the power-feeding loss from a transformer to a chemicon is reduced.
Furthermore, the magnetic reluctance of the perimeter part of a core is
reduced in a power transformer, and the LASER transformer of the super-low
leakage flux which gave the severe magnetic shield to the surroundings of the
special EI core and core which made it hard to leak in magnetic flux, or a coil
is carried in it.
The newly developed anti vibration Detent volume is
adopted as a volume.
The intensity is raised by the aluminum die-casting
frame, and this volume prevents an oscillation of a resistor or a slide child, and is reducing the occurrence of a noise.
structures chassis which made each of the power-source part, the main-amplifier
part, and the volume & tone control part become independent is adopted.
There was a black type model other than a gold-collar model.
Moreover, there was a sub- wood panel as an option option.
||Stereo Integrated Amplifier
|Output power (20Hz - 20kHz)
compact disk->SP-OUT, both channel drive
|Dynamic power (1kHz)
|THD (20Hz - 20kHz)
||0.0015% (at compact disk->SP Out, the time of 10W output 8ohm)
0.003% (at the time of Phono man month->Rec Out
and 3V output)
0.015% (at the time of Phono MC->Rec Out and 3V output)
|Cross modulation distortion (20Hz - 20kHz)
||0.004% (at the time of compact disk->SP
Out and an Output power)
|Power Band Width
||5Hz - 100kHz (IHF-3dB, THD 0.2%, 8ohm)
||150 (20Hz - 20kHz, 8ohm)
||Phono->Rec Out(RIAA deflection):
compact disk->SP Out: 2Hz-100kHz+0 -0.3dB
|Phono maximum permissible input
||Phono man month: 2.5mV / 47kohm
Phono MC: 160 microvolt/220 ohms
compact disk, Tuner, Tape, other:150mV /, 25kohm
|An Output-power voltage / impedance
||Tape Rec: 150mV/560 ohms
|SN ratio (IHF-A filter input short-circuit)
||Phono man month: 94dB (5mV input)
MC: 75dB (0.5mV input)
compact disk, other:107dB
|The tone control maximum variation
||Bass: +16dB--6dB (20Hz)
||Switched: Two lines, 100W
One line, a total of 100W
(Electrical Appliance and Material Control Law specification)
||Width 455x height 172x depth of 430mm
||Sub- wood panel CW-A917 (12,000yen)