Quick DAC question

@soix It’s an ASUS ZenWiFi Pro XT12.  Wider Range with Superior Speed​​​​​. 

ZenWiFi Pro is the new paradigm for whole-home mesh WiFi, combining performance and beauty in a perfectly balanced package. It takes the productivity and entertainment capabilities of your whole-home network to the next level, with scalable capacity for the new generation of home networking ecosystems.

I connect my streamer to the ASUS receiver via ethernet cable.  I misspoke when I called it a router.  The router (provided by Google) is connected to Google fiber and the ASUS connects to the router by ethernet. 

I believe a wifi mesh point wired to your unit as @soix said is preferable to using ethernet over ac power line.

Personally if it’s in the budget I’d get a Eero Mesh system especially if there’s a good distance/walls between your router and listening room.  For extenders this TP Link had some very positive buzz here, and this Netgear extender (might be Mesh) was highly rated by Consumer Reports FWIW, but that’s all I got.  Hope this helps. 

https://www.amazon.com/TP-Link-Wireless-Travel-Router-TL-WR902AC/dp/B01N5RCZQH

https://www.amazon.com/NETGEAR-WiFi-Range-Extender-EAX15/dp/B08K2ZX2RY

+1

mesh >> eop

Update: Thanks to key advice from you all I went ahead and got a $140 pair of TpLink Deco 5000 mesh extenders. 20 minutes of fiddling and they were set up and connected via 6a ethernet cable to the Gustard. Warmed up the Rogue Cronus Magnum 2 and then started streaming some test tracks from Tidal.

The result? The R26 lives up to its accolades. Keep in mind I can only compare it to my previous Schiit Gungnir and, before that, the Oppo 105s internal DAC, but it definitely is sonically superior as its reputation establishes. Now, is the difference in sound between an ethernet connection and the 105's own internal renderer that much question to an extent, yes. Is it worth the money I spent on the mesh extenders? I'll keep telling myself that it is. Anyhow, thanks to all for helping me get that sorted out.