|ONKYO Integra A-927
The Integrated Amplifier which adopted the
unreturned power amplifier to which NFB is not applied.
(negative feedback) is used for common amplifier for the modification of a
distortion, the expansion of a frequency band, and the reduction of an Output
load impedance,In 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.
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 it is simultaneously boosted to inside low-pass when birth control is boosted, and it is hard to hear it.
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
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, thickness of 70 microns 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.
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
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.
||160W+160W (4 ohm, 20Hz - 20kHz)
170W+170W (6 ohm, 1kHz)
||0.04% (at the time of an Output power 8 ohm, 20Hz - 20kHz)
|Cross modulation distortion
|0.04% (at the time of an Output power 8ohm)
||150 (8 ohm, 20Hz - 20kHz)
disk, Tuner, Line, Tape: 105dB
Direct, Power Amp Direct: 117dB
||Phono man month: 3.0mV / 47kohm
Phono MC: 300 microvolts/100 ohm
compact disk, Tuner, Line, Tape:300mV /, 25kohm
Direct and Power Amp Direct:500mV /, 25kohm
|Power consumption (Electrical Appliance and
Material Control Law)
||Width 445x height 165x depth of 434mm