AU-X1
The AU-X1 was the flagship in the Sansui portfolio between 1979-83. It is one of the mightiest and best sounding amps of its time - and beyond. 160 wpc rms at 8 ohms, weight almost 28 kg. More a power amp with controls than a conventional integrated amp, but it has phono MM/MC and many other in-/outputs. Lacks tone controls, though.
Some (first version) tend to oscillation problems, others (later) don't. One of the best amps ever.