Sonos AMP with Sonos Arc

You’re most welcome. I’m anxiously awaiting my Arc as well, and the software update that includes the arc information. ;)

If you do run into issues, feel free to post back, there are many members of the community who would be happy to help you get through the process. 

I’m building a new house and wont be moving in for a few months so I’ll need to wait until then, but all the pre-wiring is done!

And I assume the wireless capability also works with other Sonos SoundBars (Beam/Playbar etc)?

Yes.

There’s a single oddity which you won’t run in to, the oldest PLAY:5 (gen 1) doesn’t have the 5Ghz antenna necessary to act as surrounds. But that’s mostly a comment for others who read this thread, as you’re building new, and using the Sonos Amp to drive your own surrounds. 

Is 5GHz wifi essential for the AMP and ARC to pair?

It’s what Sonos uses, created by the front device, to ‘bond’ the surrounds. Your router does not need to generate it, it is a ‘hidden’ network created by the sound bar (or Amp) used for connection.
Gah. 2Am, thoughts not organized.

5Ghz channel is created by the front device, either a Sonos sound bar or Sonos Amp, that the surrounds, or Amp powering the surrounds, connect to. 

Ok so it wont matter if my router is running 2.4 or 5 GHz?

Well, the front sound bar or Amp will only connect to 2.4 GHz. There is no need for your router to run a supporting 5Ghz  channel. For Sonos purposes, they create a special network for the Sonos device to connect to, which is called ‘bonding’. The only reason it’s important to be aware it is 5Ghz is for possible interference issues, but you won’t see that channel. Only the Amp, in your case, will. 

You’ve been an amazing help, have a good night!