Yeah... Discovered Hitachi by accident, just wanted to see what it takes to take an amp and recap it. My audiophile experience is not very rich, but it has always been a jaw dropping experience for me.
My first shock was when I switched from a B&O enhanced phone audio to the proper USB valve DAC (Aune T1 with a rare Russian cold war military tube), then I was knocked down by Beresford Bushmaster II DAC and later finished off by attaching it's output to that Hitachi of mine. It shines both with excellent sources and more importantly with less than perfect sources on youtube, Spotify or internet radio, I guess I was lucky to come across this ancient piece of the Dynaharmony technology.
I'm still a newbie, but I'd hate upgrading it to something that technically has a cleaner and more neutral sound (shouldn't be difficult, right?) while being less enjoyable and less unforgiving for the quality of the source.