Audio Database

The pictorial image of Integra A-929

ONKYO Integra A-929
170,000yen(around the 1998 time)

Description
 
The Integrated Amplifier of the upper model which performed high-definition-ization further based on Integra A-927.

NFB was eliminated from the power amplification stage of the power amplifier part, and low-distortion-ization is realized over all the bands, without depending on NFB.
Moreover, the heat stability is also improved by the review of the temperature-compensation circuitry, the necessity also of the small resistor usually inserted in the output side of amplifier in series was lost, and the reduction of the Output load impedance of power amplifier is also attained.

The double core laser transformer to which the acknowledged laser transformer was further evolved from the former is carried in the power-source part.
By this transformer, magnetic leakage is further reduced by combining two cores of the shape of a coil which continued in the fewest rolling orientation of magnetic reluctance. Moreover, by having cut a part of core, form of a coil can be used as a cylinder type and it is possible to also coil very-thick copper wire reasonable. Powering capacity improved by this and the power-source part strong also against a continuous large current is realized also to the momentary transition.
Furthermore, a special resin is filled up with A-929, and it fixes mechanically and firmly in it so that it may shield severely to this double core laser transformer and may not be influenced to the oscillation from the interior and the outside.
Moreover, the blue capacitor is adopted as a block capacitor.

Midbass Presence other than conventional Bass/Treble is added to the tone control.
In Midbass Presence, while being unable to rectify by the conventional tone control, a low-pass (200Hz - 300Hz) coordination is possible. It is filled with the room by this, and a complement of admiration or a feeling of actual existence of vocal is possible.
Furthermore, an effective coordination is possible, when birth control is boosted, and it is simultaneously boosted to inside low-pass and is hard to hear it.
Moreover, the right-and-left independency was achieved and the Treble control has adopted the double axis type which can be adjusted.

The direct selector which bypasses a tone circuitry is carried and the power amplifier direct position which can be direct inputted into power amplifier only through a volume from an exclusive termination in addition to a tone position and a direct position is also carried.
In A-929, in order to realize a more nearly high-definition power amplifier direct, the top in terminal is adopted. The pin terminal could be prepared in the volume latest by this, and shortest-ization of an internal wiring is realized.
Moreover, the work is carried out so that a terminal cover can be used also as a cable clamper with the prevention from loss.

The 4-unit Detent volume which can constitute a dedicated communication circuit into a tone position and each direct position is adopted as a volume.
Supposing the real busy condition in a house, this volume makes the riser of a damping curve loose, and is also performing the review of Input sensitivity so that a minimum feeling of an operation may be obtained.

The WIMA film capacitor and the high precision carbon resistor are supplied to the main parts in connection with a tone quality.
Moreover, the 70-micron thickness which becomes twice usual is used for the Copper foil of the printed circuit board which constitutes main circuitries, and it is attaining quality improvement.

The speaker terminal by German WBT is adopted as a speaker terminal.
A structure is a vice type, a positive interconnection is possible for it, without damaging a cable, and also it can also insert a banana plug.

The 2mm2OFC (non-oxygen drum) cabtire cable is attached to the power cable, and the inlet scheme (power-source input connector) based on IEC specification is adopted.

Consideration is carried out so that the internal structure can constitute a rational powering line with shortest-ization of the signal path from an input to an output.
Each block considers it as a structure with firm TAP-box form, and the intensity of the whole chassis is raised by making it combine with each other. Furthermore, with emphasis also on vibration analysis, an infinite form rib is prepared everywhere and strong reservation and a variance of the vibration are aimed at.

In order to correspond also to an analog player, the man month/MC phone equalizer is carried.

The step type balance control, the Rec selector, and the Subsonic Filter are carried.

MDF is used for the bonnet which protects the side and the upper surface.

Rear
Power Double

Rating of a mode
Form Integrated Amplifier
Output power 160W+160W (4 ohm, 20Hz - 20kHz)
100W+100W (8ohm)
Dynamic power 335W+335W (2ohm)
225W+225W (4ohm)
170W+170W (6 ohms, 1kHz)
THD 0.04% (at the time of an Output power 8 ohm, 20Hz - 20kHz)
Cross modulation distortion (70Hz:7kHz=4:1) 0.04% (at the time of an Output power 8ohm)
Dumping factor 160 (8 ohm, 20Hz - 20kHz)
SN ratio Phono MM:87dB
Phono MC:70dB
compact disk, Tuner, Line, Tape: 105dB
Direct, Power Amp Direct: 117dB
Input sensitivity/impedance Phono man month: 3.0mV / 47kohm
Phono MC: 300 microvolts/100ohm, 50ohm
compact disk, Tuner, Line, Tape:300mV /, 25kohm
Direct and Power Amp Direct:500mV /, 25kohm
Supply voltage AC100V, 50Hz/60Hz
Power consumption
(Electrical Appliance and Material Control Law)
230W
Dimensions Width 445x height 167x depth of 438mm
Weight 20.0kg