Is 7 feet way from wifi access point (ceiling) to stereo risky for noise?

@dman777 

Unfortunately, I cannot advise your question specifically....   The only thing I can tell you is my experience.  My wifi was not performing well, so, I went to a EERO mesh system and my favorite and most performing configuration was using a short ethernet cable from an EERO mesh node next to my streamer, then, that EERO mesh node goes wirelessly to another EERO mesh node connected with another ethernet cable directly to my router.  This setup was a game changer regarding the stability and performane of my wifi. 

Note:  This enbled me to turn off the wifi on my streamer which could be a source of noise and also enabled to use a stack audio smoothlan network filter infront of my streamer.

Also, if you have copper (DSL) coming into your house instead of fiber optic, you can get rid of the line noise before going to your mesh node wifi or equivalent by converting to fiber optic and back to ethernet.  Here is a pic of what my conversion looks like - starting from my router, ethernet to fiberoptic, back to ethernet, then to my EERO mesh node that goes wirelessly to the EERO mesh node next to my stereo which connects with ethernet to my network filter and streamer.

I very much doubt it. Don't have experience with this particular Wifi hardware, also run an Eero mesh. The only thing to note is that inside a house, the wifi reach is MUCH reduced. A single wifi point may not be enough for the entire house. I think we have 6 eero repeaters in a 2 story 3.5K sqlt home, plus some for outdoor and greenhouse.
The only thing that ever made an audible difference was a T5HO aquarium light fixture, which introduced crazy static on a tube HP system that no cable could fix. Yes, tried a bunch.

no.

7 feet or 17 feet is fine. Just try a speed test from various locations and you will find zero degradation.