why do Ortofon SPU C from the 50ies sound so good?

If you are thoroughly enjoying the music, then your imagination will be in overdrive and so, the music will inspire you. It will not matter in the slightest if the recording is mono or stereo, played on a Mitchel Galaxy or a BSR Monarch autochanger, that you can hear ALL of the music will be essence of your enjoyment. In partnership to this, is the enjoyment of owning of the finest Hifi equipment you ever wanted. What really is great, is we all have a multitude of different tastes that keeps us discussing the virtues of different music played on a million different setups and contraptions. This has been going on for over a century and long may it continue!
The main reason you old Ortofon sounds so good? Is because you are enjoying the listening to it. Which, is good.

I agree with Martinhall. Our brean is very selective depending of our individual education. I have some friends
who are professional musicians and they 'hear' totaly different than I. They are interested in the interpetation
of an composition by the artist and don't care about the 'noise',the 'tiks' or whatever irritating things on a record. They can ,so to speak, destil the music from the
enviroment and enjoy the 'purifyd essence' of the music
without any interest in Hi-Fi. So my quess is that Thuchan is an musician who somehow got involved in Hi-Fi and is consequently asking the wrong questions.
Regards,

Well said Martinhall, this is really true. Nevertheless "being full of music" does not prevent me from avoiding "not good sound". I am becoming more and more critical and maybe also non compromise.

Yes Nandric, you are right. I was born as a musician but no one discovered and developed my talent. The only chance I had was working with music reproduction machines which led me through different stages of believing and not believing. From my profession I learned to put only wrong questions while all the others believe they put the right questions...

enjoy the sunday evening ...

best & fun only - Thuchan

Dear Thuchan, Your ironical turn of the questions suggest
also some literary talents but what I meant is that your
post is actualy telling more about yourself than your gear.
However it seems to be more easy to attribute quality to the things themself.
Kind regards,

Dear Nandric,
being a very funny animal, at least in this hobby, I am not sensitive anymore for a positive feedback on such a high level as you did. You mean I have some skills left as a man now having reached the golden age still listening to old large black discs on a humble system in a modest room? You maybe right.

best & fun only - Thuchan