Thanks for your response Stehno, you were right on the spot, I changed speaker cables and things got a lot better I finally decided on the Cabasse original cable which looks like your every day lamp cable but it has diferent color strands (whitish-blackish), I guess its all copper, but it brings out the best on my speakers, I guess they know what they are doing!
10 inches of speaker cable and the Fatigue is gone....
I also returned to my Isolation transformer, when I hooked it back on I could not believe the change, two blankets were taken off each speaker!! It makes the sound of my system.
Going to the wall outlets made my system "undetailed" lost dynamics and extension...?¿?¿?
Thank you Tvad, amazing, I would have gone for the previous set up, but I am sure the new one sounds better then... interesting!
All the best