I am no expert on this, by any stretch, but I’ve always assumed the Sonance architectural speakers have some co-designed electronics that has the ability to ‘announce’ themselves in some way to the Sonos Amp. Note that this extra piece of electronics is only installed in the Architectural Speakers, and not every speaker that Sonance makes, or Sonos sells for connecting to the Amp.
I could easily see someone buying them, and having trouble ‘moving’ them, and then lowering the price just to get them out of inventory. But I could also see the opportunity for counterfeiting, just the same as any electronics, which is why, if you feel there’s the opportunity, you should contact Sonance.
In either case, since these speakers are made by Sonance, and only co-marketed by Sonos, the chance that Sonos would have any way of referring to a list of serial numbers is much less than Sonance themselves.
