I found a Play:1 manual and it has this statement: “Sonos communicates over a 2.4GHz home network supporting 802.11 b/g wireless technology. 5GHz networks are not supported in a completely wireless Sonos setup.”
Then in one of the online articles about Sonos I found this: “Although the Sonos One speakers have hardware support for 5Ghz, this band isn’t used except for home theater configurations.” That’s probably why the FCC documents mentioned this band.
I read about the SonosNet 2.0 network, a proprietary wireless mesh WiFI network operating in the 2.4Ghz band. That’s what @pl_svn meant. This network is optional.
Anyway, Sonos does not support the 5GHz band although they use it somehow. I don’t understand why they decided to live in the past and support only 2.4GHz 802.11 b/g wireless technology, not even 802.11n! The 5GHz band has many more channels and they could use it for many purposes.
I had a chance to listen to a Play:1 speaker at the store (Ikea is too far from me) and I felt the speaker was lacking in higher frequencies but the bass was good. Does anyone else think the same about the Symfonisk? Sonos doesn’t publish frequency specs of their audio hardware. What kind of company is this?