Thank everybody for your replies.
I forgot to say that I use s sony TTS-2510 TT with Grace arm (I suppose). certainly not the best arm for Koetsu. I have
other TT (some Luxman, a JVC, a Denon) but only this one in fully functional. I also have a SAEC tone-arm which is better for Koetsu but it is not mounted so I can't use it.
As to the argument of having better (the more expensive the better)
audio equipment in order to be able to appreciate fully the Koestu,
I can say that I think that my system is good enough.
I could hear some much more expensive systems
And I did not find that they sounded much better or even better than mine.
All who heard my system (including some owners of much more expensive systems)
found that it sounded really well.
To those who say « When you buy a 10-15 k usd unit system , you will see (hear) the difference »,
I say « Probably there will be a difference, dut I know that this difference will not worth the money».
When I think how many excellent records I can buy for 1500 usd instead of that Koetsu, my choice is done quickly.

