Sansui BA 90 (1980-1982)
Specifications
| Feature | Specification |
| Year of Production | 1980-1982 |
| Power Specifications | 90W per channel (8Ω, 20Hz-20kHz, 0.02% THD), 120W per channel (4Ω) |
| Impedance | 4-16Ω |
| Sensitivity | 1V for 90W output |
| Key Features | Dual mono construction, DC power amplifier design, massive toroidal transformer, independent power supplies per channel, direct-coupled output, speaker protection circuit, high damping factor (100), gold-plated terminals |
Historical Significance
Top-tier power amplifier from Sansui's final high-end era, representing peak Japanese amplifier engineering before the digital transition. Known for exceptional build quality and pure amplification performance.
Sound Signature
Neutral, transparent, and highly detailed with excellent dynamics. Tight, controlled bass and extended highs. Minimal coloration with exceptional power delivery and stability.
Maintenance and Restoration Tips
Aging electrolytic capacitors, particularly in power supply. Relay contacts may need cleaning. Thermal paste on output transistors may require replacement. Generally reliable but benefits from recap after 40+ years.
Collectibility and Market Value
- Market Value: $800-$1,500 depending on condition and cosmetic appearance
- Collectibility Rating: 8/10
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