Thanks for this video...
I own the more affordable Sansui alpha 607i with the same basic technology and i used it as i said for his headphone out exclusively ...
And i miserably failed when i want to upgrade it to one of the best tube headphone amplifier in the world by all reviews account ...Think about it ...
This is testimony of this S.S. Sansui design quality even for the headphone out ...
Dont try to buy a top alpha they dont go on sale here very often ... they are sold in hours ... And at high price for vintage ... And this model is so rare good luck to buy one ...
Now ask yourself this question : Save for those crazy japanese audiophile company, who sold at high price today the same quality of components with on par sound quality at least ?
Answer : not many are crazy enough to discard profit margin to use so costly basic parts ...
is there better amplifier today ? Yes for sure but what are their cost ? Not peanuts ...
There is also a three part 1h thirty minute restoration video :
https://www.youtube.com/watch?v=Bk8KXkT0ZuY