Sansui AU 117II (1977-1979)

Specifications

Feature	Specification
Year of Production	1977-1979
Power Specifications	30W per channel (8Ω), stereo
Impedance	4-16Ω
Sensitivity	Unknown
Key Features	DC amplifier design, dual power supplies, direct-coupled OCL circuitry, phono stage with MM/MC support, tone controls, loudness switch, speaker selector

Historical Significance

When Sansui launched the AU 117II in 1977, it wasn't just releasing another amplifier—it was refining a philosophy. As a proud member of the legendary 'Alpha' series, this integrated amp embodied the Japanese engineering ethos of the late '70s: precision, purity, and no compromises. Its DC amplifier design did away with coupling capacitors entirely, a bold move that eliminated signal path bottlenecks and delivered a cleaner, more direct sound. Backed by dual power supplies and direct-coupled OCL circuitry, the AU 117II wasn't just built to last—it was built to reveal what your records were truly hiding.

Sound Signature

The AU 117II speaks with clarity and confidence. Its sound is transparent and detailed, effortlessly unraveling complex passages without strain. Dynamics snap to attention, bass stays tight and controlled, and the tonal balance walks a neutral line—though it subtly warms the presentation, just enough to keep things musical. Whether you're spinning vintage jazz or early rock pressings, this amp doesn't color the sound so much as clarify it, letting the music breathe with natural presence.

Maintenance and Restoration Tips

After four decades, the AU 117II demands some attention—but it rewards care with performance. Electrolytic capacitors are the first to check; they often dry out and should be replaced to restore stability. Pots and switches benefit from a thorough cleaning to eliminate crackles and channel imbalances. Watch for sticky relays in the speaker protection circuit, and don’t overlook the small details: indicator bulbs dim or fail over time, and fresh ones bring back that authentic glow. A well-serviced unit sounds as good as it looks—smooth, quiet, and ready to drive your favorite vintage speakers.