How can it be SQ difference in a digital balanced audio stream? I belive(d) that was impossible. Are there any professional studies supporting such differences?

I guess I have gone the opposite direction, switching to super cheap cables.

/Frode

Trinnov Altitude32, Kii Three/BTX, Piega 211, BO Beolab17, 4 x Piega AP 1.2, Perlisten D212S, 2 x Velodyne DD10+, RoonServer on Unraid docker.