Tidal WiFi not as good as cd

Tidal, Qobuz, etc. sound quality will work using a Wi-Fi connection (maybe) but the sound quality using a wired connection will be much better.

Thanks for clarifying, Howard. 

I stream wirelessly from an Asus router to an Auralic Aries and sound quality with both Tidal and files stored on a NAS is excellent.  Auralic recommends using the wi-fi connection in order to eliminate the possibility of electrical noise traveling through the Ethernet cable from your router and other upstream devices. Whether this is a real problem I can’t say, since I’m not able to run a cable all the way from my router on the second floor to my listening room in the basement.

I stream wirelessly... and sound quality... is excellent

Correct. A WiFi feed or a Wired feed will work well (dependant on proper implementation).

Sound Quality is another subject, and here there is variable feedback on which approach is preferred or 'best' for one's system.

Wifi is yet another piece of the puzzle which needs to be sorted properly, starting with your IP, of course. A moderately fast speed is more than enough to stream high res audio. (If you can stream Netflix, Hulu, or some other video service then your speed is beyond adequate.) Then, if you have crappy wifi coverage a mesh router is a great solution. You can even go wired from a mesh point as I do with my microRendu, allowing for some flexibility with ethernet-in devices. Once your wifi is sorted you will be hard-pressed to hear a difference between it and wired. I've used both Tidal MQA and Qobuz 24/192 streams without issue or sound degradation via my own well-sorted out wifi.  

Asus RT-AC3100 (AiMesh-capable) or RT-AC3200 (tri-band 2x5Ghz + 1x2.4Ghz) can wifi Tidal HiFi  without issue.

Current  network (covering 1 acre and 4k sq.ft. 2-story house) is AC3100 (mesh router), Cat6 to two AC1900 (mesh nodes) streams Tidal Hifi everywhere in the house and (near as I can tell) anywhere on the property.

+1 use good wireless router(s).