Why do I need a switch?

Forget the switch. If your sound is noisy, get a Ethernet-to-fiber then back to Ethernet setup going to your dac and you will clean up the signal.

As for getting multiple switches to clean up the signal, that’s nuts. But if you can tell the difference, whether it’s real or not, then do it.

@nd1der 

The reason I am trying to add a bit of fiber is to remove noise. If you have fiber coming into your home and modem, then you are good to go. You could try running fiber out of your modem to your router, but you probably won’t hear any difference.

OP:

The ifi iPower adaptors should work well and minimize AC noise generation. RELATIVELY affordable given the usual markup on anything that says "audiophile" on it.

I run my DAC on a Power X version, and then use the next level down for my streamer, and network switch in my HT. 

https://amzn.to/3zqmTUm

@pcrhkr

I’ve been using the for about a year and it works great!

NETGEAR Powerline adapter Kit, 2000 Mbps Wall-plug, 2 Gigabit Ethernet Ports with Passthrough + Extra Outlet (PLP2000-100PAS) https://a.co/d/0pfP5NU

One out goes to the integrated and the other goes to the server.

I'm not overwhelmed by iFi. I prefer something more conventional like these:

AUDIOPHONICS PSU-HC Regulated Linear Power Supply 5V 5A 60VA

AUDIOPHONICS PSU-HC Linear Regulated Power Supply 12V 5A 100VA