|SANSUI AU-alpha 507XR
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.
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.
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.
|Effective output (20Hz - 20kHz, both channel operation)
|THD (at the time of an effective output)
||0.008% or less (8ohm)
|Cross modulation distortion
||0.008% or less (8ohm)
|Input sensitivity/input impedance (1kHz)
||Phono MC: 300 microvolts/100 ohm
man month: 2.5mV / 47kohm
compact disk, Tuner, Line, Tape1, 2:150mV / 47kohm
||Phono man month: 20Hz-20kHz}0.5dB
compact disk, Tuner, Line, Tape1, and 2:DC-200kHz+0 -3 dB
||Phono MC: 70dB or more
Phono man month:
88dB or more
compact disk, Tuner, Line, Tape1, 2:110dB or more
||The Bass maximum variation: }8dB (50Hz)
The Treble maximum variation: }8dB (10kHz)
||16Hz (-3dB), 6dB / oct
||+ 9dB (50Hz), +3dB (10kHz)
||+ 9dB (50Hz), +6dB (10kHz)
|Bass boost 1
|Bass boost 2
||Width 430x height 135x depth of 365mm