SANSUI AU - α 507
¥ 59,800 (released in 1986)
Commentary
Integrated amplifier with heavy-duty power supply.
The dynamic power of 350W + 350W (2 Ω) increases the speaker drive capability under low impedance loads, and realizes excellent transient response characteristics, reducing TIM distortion, harmonic distortion, and intermodulation distortion.
The power supply section uses a 10,000 μ Fx2 Great Supply power supply condenser specially developed for audio use. In addition, the use of anti-vibration material reduces the deterioration of sound quality caused by unnecessary vibration of the transformer itself.
The concept of high rigidity is thoroughly applied to the whole amplifier in order to firmly suppress unnecessary resonance.
In the AU - α 507, not only the rigidity of the external housing is increased, but also the power transistor is installed in a position where vibration and noise generated does not adversely affect other parts.
It is equipped with source direct, and input can be made without passing through an accessory circuit by simply switching the switch from the normal input state.
It is equipped with tone control with defeat function.
Uses a power cord with polarity display.
It is equipped with a REC selector with an OFF position to prevent degradation of sound quality due to excess circuit.
The MM/MC phono equalizer uses a high-gain IC.
The front panel has a glossy and hairline finish made of aluminum material.
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Model Rating
| Type | Integrated DC amplifier |
| Power Amplifier Unit | |
| Effective output (10 Hz to 20 kHz, both channels driven) | 90W + 90W (6 Ω) 80W + 80W (8 Ω) |
| Total harmonic distortion factor (at effective output) | 0.005% or Less (8 Ω) |
| Cross modulation distortion factor | Not more than 0.005% |
| Damping factor | 100 (8 Ω) |
| TIM (SAWTOOTH) | Below the measurement limit |
| Slew rate | ± 150 V / μ sec |
| Equalizer Section | |
| Input Sensitivity / Input Impedance (1 kHz) | Phono MM : 2.5mV/47k Ω Phono MC : 200 μ V/100 Ω CD, Tuner, Line : 150mV/47k Ω Tape play : 150mV/47k Ω |
| Phono maximum allowable input (new IHF, THD 0.01%) | MM:210mV MC:25mV |
| Frequency Response (at 1W) | Phono MM : 20 Hz to 20 kHz ± 0.2 dB CD, Line, Tape play : 1 Hz ~ 200 kHz + 0 -3dB |
| SN ratio (at 1W) | Phono MM : 83 dB or more Phono MC : 70 dB or more Tuner, Line, CD : 110 dB or higher Tape play : 110 dB or more |
| Tone control | Bass : ± 8 dB (100 Hz) Treble : ± 8 dB (10 kHz) |
| Subsonic filter | 16 Hz (-3dB, 6dB/oct.) |
| Loudness | + 8 dB at 30 Hz, + 6 dB at 10 kHz |
| <General> | |
| Rated power consumption (Electrical Appliance and Material Control Law) | 175W |
| External dimensions | Width 448x Height 135x Depth 370 mm |
| Weight | 10.2kg |