+1, @antigrunge2
Keep it short and use your best LAN cable between switch and streamer. You can try the Ansuz switch near router to see if it makes any difference to your TV, blu-ray or receiver. My money is on switch near the dCS DAC using the best LAN cable. I am using a mass produced switch with iFI wall wart for TV, Apple TV, Blu-ray off Amazon and it does the job well.