Hi Mr. Abbas,
I have done some changes in my system. I have changed the interconnects to a copper OCC (no silver here) and I have changed the 12AX7 preamp tube to a 5751 RCA 3 Mica Black Plates, which has gain similar to D3a. All I can say is that yesterday I had an absolutely astonishing sound from your DAC. I had never heard such a clean, beautiful, deep sound from my system. Music came out effortless, no harsh, absolutely musical. I am really happy now.
I just cant imagine how my system will evolve considering the the new tubes and DAC still need burn in….
Thank you very much!!