My streamer / dac already sounds. It’s something wonderful, I’ve never heard anything like it, at any price, and I’ve heard very expensive equipment. The result is completely analog, and much of the merit of has its output soundstage. It is not finished yet, when it is finished and in a nice box I will send you the photos. I have been able to see that the quality of the 5687 tube is critical, much better that you have put the Philips Jan.
Any advice to improve output sounstage in the future will be welcome, although I can not imagine that it sounds better (only the subbass should be more powerful) but I think this is a limitation of the tda1541A chip.
I just wanted to share this with you and thank you for making a small dream come true.