Sansui AU 317 (1977-1979)

Market Value: $300-$600 depending on condition and cosmetic appearance
Collectibility Rating: 7/10

Name: Sansui AU 317
Brand: Sansui

Specifications

Feature	Specification
Year of Production	1977-1979
Power Specifications	45W per channel into 8Ω (stereo)
Impedance	4-16Ω
Sensitivity	Unknown
Key Features	DC amplifier design, dual power supplies, direct-coupled OCL circuitry, phono stage with MM/MC capability, tone controls, loudness switch, dual power meters

Historical Significance

Emerging from Sansui’s elite Alpha Series, the AU 317 marked a turning point in the brand’s engineering philosophy—bridging the warmth of their analog legacy with a new era of technical precision. Built between 1977 and 1979, it was among the first Sansui integrateds to embrace full DC-coupled amplifier design, eliminating output capacitors to tighten bass response and improve signal path integrity. This wasn’t just an evolution—it was a statement of intent: high fidelity without compromise.

Sound Signature

The AU 317 delivers a clean, articulate sound that stands apart from the lush romanticism of earlier Sansui models. Its neutral tonal balance reveals layers of detail without clinical sterility, backed by sharp transient response and firm, controlled bass. Highs glide smoothly, never harsh, while the dual power meters pulse in rhythm with the music—visual proof of its dynamic confidence. Audiophiles often praise it for accuracy, yes, but also for the quiet sense of authority in its delivery.

Maintenance and Restoration Tips

After four decades, these amplifiers demand attention—but reward it generously. Electrolytic capacitors are likely dried out and should be replaced. Pots and switches benefit from a thorough cleaning to eliminate crackle. Check and recalibrate the DC offset, as drift can stress speakers. Some units develop relay hesitation or flickering meter bulbs—simple fixes for those with a soldering iron and a steady hand. A full recap and service breathes new life into the AU 317, often unlocking performance that rivals modern gear.