Audio Database

The pictorial image of Integra A-917R

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.

In order to realize a highly precise amplification, constant current bias amplifier is adopted.
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).
This constant 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.
Thereby, the 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.

The 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 is raised.

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.

The 3LOAD-RESISTOR-BOX 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.


Rating of a mode
Form Stereo Integrated Amplifier
Output power (20Hz - 20kHz)
compact disk->SP-OUT, both channel drive
130W+130W (6ohm)
110W+110W (8ohm)
Dynamic power (1kHz) 2ohm: 300W+300W
4ohm: 215W+215W
6ohm: 165W+165W
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)
Dumping factor 150 (20Hz - 20kHz, 8ohm)
Frequency characteristic Phono->Rec Out(RIAA deflection): 20Hz-20kHz±0.2dB
compact disk->SP Out: 2Hz-100kHz+0 -0.3dB
Phono maximum permissible input
(1kHz/10 kHz, 0.005%)
Input sensitivity/impedance 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)
Phono MC: 75dB (0.5mV input)
compact disk, other:107dB
The tone control maximum variation Bass: +16dB--6dB (20Hz)
Treble: ±10dB (20kHz)
Muting -20dB
Power source AC100V, 50Hz/60Hz
AC outlet Switched: Two lines, 100W
Unswitched: One line, a total of 100W
Power consumption
(Electrical Appliance and Material Control Law specification)
Dimensions Width 455x height 172x depth of 430mm
Weight 17.0kg
Option Sub- wood panel CW-A917 (12,000yen)