I am also interested in this issue, as building a new system and considering the Lumin T2 with Roon.Beside the quality ethernet cables I was recommended to add a fiber optic bridge or isolation between the router/switch and the Lumin, for example 2 Sonore optical modules.
The Lumin X1 has a fiber optic commection built in, so I assume something similar would help with the T2 as well....?
The Lumin X1 has a fiber optic commection built in, so I assume something similar would help with the T2 as well....?