I owned two of them in my life and they were good...
My actual Sansui alpha is not the same as illustrated here but posterior of few years and the peak of Sansui tech.,..
He drives my headphone from the headphone out better than the best tube headphone amplifier and pre-amplifier i bought (a very TOP design very well known) but the difference were so staggering i returned the new tube amplifier immediately..
Think about that: a powerful Tube amp with a top linear power supply beaten by the headphone amp out of a vintage Sansui amplifier...
I thought i was upgrading changing my Sansui alpha and the return back cost me money but i dont regret the lesson...
Vintage top product dont means obsolete...
Vintage means you need to clean and put in in his original state, thats all...
( As a sidenote the TOP new headphone amplifier had a way better noise floor level control but was unable to drive into the third dimension with natural timbre my heaphone AKG K340 it takes me 15 minutes to decide so much the difference was staggering in spite of a higher noise floor with the Sansui)