... should I run a single short Ethernet cable from my router to the switch and then connect the various TV devices, plus my Antipodes DX server, to the switch....is it that simple?
@mitch2 What I suspect would be best is to leave the TV-related devices connected as they presently are, directly to the router, and to try (a) inserting the switch between the Antipodes and the Metrum, and then (b) inserting the switch between the router and the Antipodes. And comparing results between (a) and (b) and what you have now.
Assuming it sounds better, am I to understand the next step that would further the sonic improvement would be to purchase an "audiophile" switch ....?
Perhaps. But I don't think anyone can predict with a great deal of confidence that there would be further improvement, given the many component, cable, and system dependencies that are inherent in the explanations I and Atdavid have stated.
Best regards,
-- Al