Audio Database

The

SANSUI AU-alpha 507i
59,800yen(around the 1987 time)

Description
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The Integrated Amplifier which realized low-impedance load-intensity drive capacity up to 2ohms by carrying a powerful power stage and a power-source part.

The heavy weight class power transformer and the capacitor only for an audio are adopted as a power-source part.

The Source-Direct functionality is carried, an accessories circuitry is passed and all the input sources can be transmitted to power amplifier by the shortest distance.

The tone control which carries a defeet functionality is carried.

The solid chassis which considered the vibration proof and the shielding property enough is adopted as a chassis, and the influence of an unnecessary noise or an electromagnetic-wave noise is eliminated.

The REC selector is carried, and when using neither a sound recording nor a dubbing functionality, the input/output circuitry for a sound recording can also be separated from the main signal paths.

The man month/MC change phone equalizer is carried.

The polar attached-indicator power cord is adopted.

The Subsonic Filter is carried.

Power Power-source

Rating of a mode
Form Integrated DC amplifier
<Power amplifier part>
Effective output (10Hz - 20kHz, both channel drive) 90W+90W (6ohm)
80W+80W (8ohm)
THD (at the time of an effective output) 0.005% or less (8ohm)
Cross modulation distortion 0.005% or less
Dumping factor 100 (8ohm)
TIM distortion (SAWTOOTH) Below a limit of measurement
<Preamplifier part>
Input sensitivity/impedance (1kHz) Phono man month: 2.5mV / 47kohm
Phono MC: 300 microvolts/100 ohms
Tuner, compact disk, Line, Tape Play:150mV /, 47kohm
Phono maximum permissible input MM:210mV(THD 0.01%)
MC:25mV(THD 0.08%)
Frequency characteristic Phono man month: 20Hz-20kHz}0.2dB
compact disk, Line, Tape Play:1Hz-200kHz+0dB-3dB
SN ratio Phono man month: 83dB or more
Phono MC: 70dB or more
Tuner, Line, compact disk, Tape Play: 110dB or more
Tone control The Bass maximum variation: }8dB (100Hz)
The Treble maximum variation: }8dB (10kHz)
Subsonic Filter 16Hz (-3dB, 6 dB/oct)
<Synthesis>
Power dissipation 175W
Dimensions Width 448x height 135x depth of 370mm
Weight 10.8kg