Sansui?

You can’t go wrong with the Sansu integrated. I have an AU 5900, I love it. You may want to look into having one recapped, then you know it will be reliable. I’ve had several Sansui. Pull the trigger, don’t look back.

Yes they improved it as headphones were improved too... But why my Sansui alpha was able to  beat the tube  Berning amp for synergy with the K340 then ?

And if they improve so well the headphone too why is my K340 was able to smoke to a bin trash my 9 other headphones ? do you have an answer ?

Synergy matter ; and  top flagship of the past are not trash nowadys.... Acoustic experience dont reduce to electronic design of the separate components ... We must also EMBED  the components then we listen to them not to their price tag ...

Sorry i could not resist to answer to your common place "evidence" ...

Sansui was big for the military at the PX during Nam. They made a few good pieces back in the day but SS has improved considerably since then.

Bought a new AU 717, TU717 & tape deck in 1978. Excellent system.

Might want to check in with the Audiokarma website. Those folks are knowledgeable on the vintage stuff and you're less likely to encounter a flame war.

Get your brother-in-law a pair of original JBL 100's or the 4312's to match the vintage Sansui amp. The Alpha 907i is a formidable piece!