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| ONKYO Integra M-508
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| 240,000yen(around the 1986 time) |
Stereo power amplifier which investigated the real
phase (digital) amplifier stream composition which reproduces exact phase and
sound field.
In order to keep the phase of an input signal from being
confused, it is necessary to make it the speaker electric current from which the
phase shifted not return to an amplification part. For this reason, the
interference to an amplifier circuitry is eliminated by adding a power in phase
transformer to an electric-current path.
The right-and-left
independent-source scheme is adopted, and the phase response of amplifier is
improved by carrying two power in phase transformers only for L/R Integra M-508.
Moreover, the common mode noise which invades from AC line is also
eliminated by the power in phase transformer.
The power-source part of 4
transformer stream compositions which added the power in phase transformer only
for L/R to the right-and-left power transformer,The power transistor of a triple
push pull, the 10,000-micro F power-source part of large-sized capacitor x8, the
direct power feeding by the shortest distance, etc. have realized high power.
In order to suppress a failure of Loule Bell which poses a problem with
high power amplifier, the low distortion is realized by adopting a setups of the
low-noise bias which adopted linear switching and light emitting diode, W
sensing servo circuitry, etc.
The input terminal carries two lines,
Direct and Variable.
The peek meter which can switch a meter range to
two steps is carried.
ON/OFF of an illumination is also possible for this
meter.
The polar attached-indicator power cord is adopted.
The
right-and-left independent level controller with a high precision multi-brush is
adopted.
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.JPG) |
.JPG) |
| Form |
Stereo power amplifier |
| <Amplifier part>
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| Output power (20Hz - 20kHz) |
290W+290W (4ohm)
240W+240W (6ohm)
200W+200W (8ohm) |
| Dynamic power |
690W+690W (2ohm)
460W+460W (4ohm)
270W+270W (8ohm) |
| THD |
0.002% (at the time of 20Hz - 20kHz, 8 ohm, and an Output power) |
| Cross modulation distortion |
0.003% (at the time of 70Hz:7kHz=4:1 and an
Output power) |
| Power Band Width |
5Hz - 100kHz (IHF-3dB, THD0.2%)
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| Gain |
32dB |
| Frequency characteristic |
1Hz-100kHz+0 -1.5 dB |
| Input sensitivity/impedance |
1V/20kohm |
| SN ratio |
124dB (an IHF-A filter, input short-circuit)
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| Dumping factor |
140 (8 ohms, 50Hz) |
| Input terminal |
Variable: One line
Direct: One line
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| Output-terminal |
Speakers: Two lines |
| <Meter part>
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| Range switching |
x1 (0dB=200W)
x0.1 (0dB=20W)
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| Indicating range |
x1 range: 0.01W-500W
x0.1 range:
0.001W-50W |
| Indication precision |
0±1dB
- 10±2dB
- 20±3dB
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| Speed of response |
100microsec (-infinity->0dB)
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| Carriage-return velocity |
1sec (0dB->-20dB) |
| <Synthesis>
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| AC outlet |
Power-switch un-interlocking.: One line,
100W |
| Power source |
AC100V, 50Hz/60Hz |
| Power consumption |
500W (Electrical Appliance and Material
Control Law) |
| Dimensions |
Width 465x height 187x depth of 426mm
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| Weight |
25kg |
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