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| SANSUI AU-alpha 507XR
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| 59,800yen(1994 release) |
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The Integrated Amplifier which inherited the design
technique of the high-end model and was developed.
DC amplifier stream
composition amplified in a straight from DC to a high-end is adopted.
Since
DC amplifier does not need the capacitor of a signal path, it is not influenced
by the tone quality by a capacitor, but it can reduce a low-pass time constant.
The heavy weight class power transformer which strengthened vibration proof
and thermal resistance with the high-density fill, and the electrolytic
capacitor only for an audio excellent in condensation / electric-discharge
speed are adopted as a power-source part.
Moreover, the power transformer is installed
by the strap mounting scheme hung upside down from a body upper portion, and has
prevented the propagation of the oscillation by the way of using the self-weight
of a transformer.
The presence control in the 4 mode which can adjust a
tone-quality balance according to a listening status is carried.
Loudnesses 1 and 2 raise a high region and low-pass simultaneously, and
the bass boosts 1 and 2 are raising low-pass which runs short easily with
a small speaker .
The suitable tone quality is gained to the name of XR by adopting
what was selected carefully as tone-quality parts, such as a resistor, and
putting into practice non-magnetic-material-izing and the vibration proof
performance of each part further, and also improving a basic circuit.
In
order to realize a purer music play, the Source Direct which shortest-izes
signal channels of communication is adopted.
Accessories circuitries, such
as a tone control, a balance volume, and a Subsonic Filter, are omitted, and the
pure transmit is enabled.
The MC/man month phone equalizer is carried.
The mini Detent volume is adopted as a volume.
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| Form |
Integrated amplifier |
| Effective output (20Hz - 20kHz, both channel operation) |
80W+80W (6ohm)
60W+60W (8ohm) |
| THD (at the time of an effective output)
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0.008% or less (8ohm) |
| Cross modulation distortion |
0.008% or less (8ohm) |
| Dumping factor |
135 (8ohm) |
| Input sensitivity/input impedance (1kHz)
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Phono MC: 300 microvolts/100 ohm
Phono
man month: 2.5mV / 47kohm
compact disk, Tuner, Line, Tape1, 2:150mV / 47kohm
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| Frequency characteristic |
Phono man month: 20Hz-20kHz}0.5dB
compact disk, Tuner, Line, Tape1, and 2:DC-200kHz+0 -3 dB |
| SN ratio |
Phono MC: 70dB or more
Phono man month:
88dB or more
compact disk, Tuner, Line, Tape1, 2:110dB or more
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| Tone control |
The Bass maximum variation: }8dB (50Hz)
The Treble maximum variation: }8dB (10kHz) |
| Subsonic Filter |
16Hz (-3dB), 6dB / oct |
| Loudness 1 |
+ 9dB (50Hz), +3dB (10kHz) |
| Loudness 2 |
+ 9dB (50Hz), +6dB (10kHz) |
| Bass boost 1 |
+10dB(50Hz) |
| Bass boost 2 |
+11dB(50Hz) |
| Power dissipation |
160W |
| Dimensions |
Width 430x height 135x depth of 365mm
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| Weight |
10.5kg |
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