If you've designed the wiring correctly this can be done at the central junction, isolating the that room (or rooms). then, when you setup that sound system in the room you already have the speakers built in. just plug into the port on the wall :D I've seen this kind of setup several times, though it was the early 2000's, before the massive proliferation of wifi audio.

note: one of the reasons i saw a lot of this was the company i worked for acquired a structured wiring company (system in a box) that did lots of home/office AV work