Wow. Interesting request. What price point would you be willing to place on such speakers? How large do you think the number of purchasers would be?
Sonos is a consumer product, you seem to need something a bit more professional. Your problem could partly be solved by using Trueplay though. Trueplay takes different seating positions into account.
Don’t get me wrong, the ARC, Subv3 and two ERA 300’s sound really good for what they are….honestly impressive! I did tune using Trueplay, but what I’m hoping this gets Sonos thinking about is taking it to a next level (or a second row as it were - lol)…..by allowing us MULTIPLE tuning setups that we can switch to without re-running Trueplay...say for music listening, front row watching, front & back row watching, etc….A reasonable increase would be fine, $200-300 more? (not sure what it would actually cost Sonos).
Rumour has it Sonos ARC v2 will be higher-end anyway, and I agree with that, the ARC needs more balls I think (although my room is only 23L x 15W x 8H ft, I find I'm wanting power SOMETIMES for non-ATMOS movies)….This type of tuning would make it SO versatile for deploying in many types of rooms (although it would be ideal for a dedicated room like I have).
Now that we’re discussing this….how about allowing a second set of ERA 300’s!?! :)
You can’t have two sets of surrounds in a Sonos surround set up - again this would be a feauture request, that in my opinion would take Sonos away from it’s roots.