Srinath, Yes, Sansui, was half asleep when I typed that. and yes I can here a difference between the Sansui BA-f1 / Ca-f1 vs yamaha or any others for that matter. As a musician, I can with out reservation, say with great confidence, that Volti full k horn mods and the above sansui, have not been out done by any amps, speakers i have heard over the last 45 years. I am not saying that to justify my purchase. Money does not enter into the equation. Faithful ( as possible) sound reproduction does. My quest has taken me to Audio stores over 15 states, hundreds of systems from 5k to 250k. Of worthy note, there was a system for around 5 k that did pretty good. Even the mighty Reference set up from Peter Snell and the best amps yamaha could make back in the 80's , do not come close to my volti/ sansui set up. I have attended live performance's and gone back home to listen to my beloved volti/k-horns, and OMG they were so close !
FWIW....The sansui ba-fi and ca-f1 are completely gone thru, and spec out as new....and yes slew rates are super important! ( if you want all of the content to be played.... this is where tube sets lack. it a matter of physics d=rt) )