|ONKYO Grand Integra M-510
|900,000yen(around the 1991 time)
Stereo power amplifier which supplied technologies,
such as a double transformer drive scheme, and was developed in order to enable an ultimate music play.
With common amplifier, the electric current from
which the phase shifted according to the property of the speaker comes back to
the amplification part of amplifier through flux, a grounding, or a B supply.
The signal with which this phase shifted wears to an input signal, and what the
phase was mixed and existed works as an input signal. For this reason, the right
phase information includeded in the music intelligence from the first will be
confused, and the feeling of sound field which is taking out the delicate phase
difference will also be disturbed.
In M-510, in order to keep that from
which the phase shifted from returning to an amplification part, a transformer
called an in phase transformer is carried in the path of an electric current. By
this in phase transformer, if the wave-like electric current in the positive
side flows, the same wave-like electric current will flow into the negative side
exactly by it at an opposite phase. Thereby, the positive and negative side
controls, is mutually and only the excessive component which rode and came back
to the power-source electric current is canceled. Braking of the bass was
improved by this and the outstanding bass play is realized.
Moreover, by the
in phase transformer, the fogging of the flux generated from a power-source part
is stopped, and the play capacity of Loule Bell is also improving.
power transformer on either side is made to become independent, and it has three
power transformer composition by using another transformer for power sources
other than a signal system. Furthermore, since the in phase transformer is
carried in the power circuit on either side, it has composition by five
transformers in total.
Four capacitors of the capacitor of 33000 micro
F/100V are used for a power-source part, and the original vibration proof structure is adopted as a fixture.
According to the location and the quality
of the material of the belt which fixes a capacitor, this is what noted that
sound changed, and it is using the original mounting arrangement which
suppresses the oscillation by sound pressure, newly developing it.
channels are using the high power transistor for an output stage.
printed circuit board of a glass epoxy resin is adopted as the substrate of the
circuitry for the Lords.
The power meter of a right-and-left
independency is carried in the front panel.
The meter can perform a change and ON/OFF of a range, and also can also switch an illumination by a two-step.
Two input terminals, a variable input with a volume and a fixed input, are carried.
37 copper wire 0.26mm in diameter was twisted on AC cable, and leakage flux was canceled on it, and also the large-current capacity
low-impedance cable which suppressed the vibration by the double sleeve is
adopted as it.
The weighting indicator is carried and the status of the
warmup at the time of the power source ON can be checked.
organization by increasing an idling electric current temporarily works, and the
warmup time is shortened in about 10 minutes.
||The reactive loading
imitating the phase response of the speaker is in the direction on a photograph.
The trial production and the experiment of an in phase transformer piled up
The transformers reflected to a photograph are some transformers
made as an experiment.
||Stereo power amplifier
(20Hz - 20kHz, both channel drive)
|THD (20Hz - 20kHz)
||0.005% (at the time of an Output power)
|Cross modulation distortion (70Hz:7kHz=4:1)
||0.003% (at the time of an Output power)
|Power bandwidth (IHF-3dB, THD 0.2%)
||5Hz - 100kHz
||1Hz-100kHz+0 -1.5 dB
||1V (at the time of an Output power)
0.058V (at the time of 1W output)
|SN ratio (A correction, input short-circuit)
||120dB (at the time of an Output power)
(Electrical Appliance and Material Control Law specification succession)
||300 (8 ohm, 50Hz)
||Variable: One line
Direct: One line
||Speaker: Two lines
||x1 range: 0.01W-800W
x0.1 range: 1W-80W
|Speed of response
||720W (Electrical Appliance and Material
Control Law specification)
160W (at the time of a non-signal)
||Width 507x height 264x depth of 512mm