The Lumin U2 supports LC/LC optical fiber connectivity with an upstream music server/NAS/network router, which in my experience, is superior-sounding (no low-and high-source leakage impedance current...
I, too have many records. I also use Qobuz. Friends and I have a common playlist where we post songs we like, any genre, new or old. All of us search and use Qobuz and some use Tidal, but we all find...
Holy Moly! That must've been quite a challenge to get them all synergizing with one another, not to mention the Trio's!
U2 and U2 mini have the new processing engine which is a big step up. Which Kenneth Lau power supply model do you have?
Did you read the article in the attached link? If you did you'd know the answer to that question.
Munich High End 2024