Sansui AU 8500 (1976-1979)
Specifications
| Feature | Specification |
| Year of Production | 1976-1979 |
| Power Specifications | 60W per channel (8Ω, 20Hz-20kHz, 0.1% THD) |
| Impedance | 4-16Ω |
| Sensitivity | 150mV (phono), 1V (aux) |
| Key Features | Dual power supply, DC amplifier design, FET differential input stage, direct coupling, phono equalizer with low-noise transistors, independent preamp/power amp sections, tone defeat switch |
Historical Significance
The Sansui AU 8500 was the top model of the X-Balanced series, built in the mid-1970s. It is a heavy, solid integrated amplifier that sits close to separates-grade performance. It packs a dual power supply and DC-coupled amplification into a single chassis. It is still a benchmark for people who want refinement and real capability in one box.
Sound Signature
The AU 8500 has a clean, neutral tonal balance, with detail and transient speed that few solid-state amps of its time could match. Bass is tight and articulate, the midrange is transparent, and the highs extend easily without getting fatiguing. It lacks the coloration of tubes, but it avoids the clinical sterility of many transistor designs. It works fine with a turntable or a line-level source.
Maintenance and Restoration Tips
After decades of service, these amps need careful attention. The electrolytic capacitors are likely dried out and should be replaced to restore performance and prevent damage. DC offset often drifts over time, so adjusting it is essential. The volume and selector switches tend to get noisy, and a thorough cleaning with contact cleaner can bring them back. Watch for failing relays, especially in the signal path. Don't overlook the small dial bulbs either. Replacements are still available.
Collectibility and Market Value
- Market Value: $400-$800 depending on condition and restoration status
- Collectibility Rating: 8/10
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