I bet it is a black plate Sansui of the AU series...
It is the most mythical one...It beat their receivers which are supposed to be among the best...
i own the AU 7700... more versatile good amplifier do not exist, it will take a page to enumerate all his functions and possibilities... I dont use it now but i dont sell it... 😊
But the alpha series just after is the most refined sound...My AKG K340 is so picky it asked for a lower noise floor and the more refined sound possible... The circuit direct bypassing any useless functions and tone control did it...
i love the two Sansui ...
So good that upgrading would be a risky affair , if we want a real upgrade nort a marginal improvement, save to invest big money for my price paid (300 bucks for the alpha and 100 bucks for the Au 7700 )... Berning ZOTL or class D atma-sphere ? Anyway i use only headphone and i dont think the class d own an headphone out... Then the ZOTL...
The only weak link in my system is a dac i love very much ...The small minuscule Hidizs Ap 80 pro...
Upgrading it : The Choueri BACCH filters will cost me thirty times or forty times his price...
no upgrading for me till i die... Anyway i am in sonic heaven and Sansui was a gold deal for what i paid... I stole the two sellers ...😊
Many movies used this iconic amplification ... I dont remember the movie titles... I learned this many years ago when i go in an extensive research about the Sansui reviews and alternative for 6 months... I was very cautious buyer...
But Sansui was very popular in the Vietnam war era with the american soldiers , then many movies show them...
The whole system appears to be Sansui,