Sonos 9.1.4 and room acoustic treatment

Could you please define what you mean by 9.1.4? 

My understanding is there is no setup in which Sonos allows 4 subwoofers to be used in a single ‘room’, nor more than two surround speakers. 

In response to your question, sound absorption could be difficult, but you may be reaching way beyond Sonos capabilities, and need to consider another option. And it depends, of course, on how much ‘absorption’ is taken by these panels. You may want to consult an audio professional, rather than relying on ‘public, unpaid for’ commentary. 

There no value in putting absorption panels at a location where you want audio to reflect from that location.  Trueplay pay compensate some, but not entirely, and you’re getting negative value from your panels.   You might get some value if you place the panels along the wall where you don’t have audio reflecting off the walls, but you’ll get very minimal returns from that...since there isn’t any (or little) audio to reflect. 

It might make some sense to get absorption panels along the back wall, or maybe the front wall, but that’s about it.

Ah Bruce.  4 is the number of atmos ceiling channels.  (2 from the Arc, 2 from the Era 300s I presume).  1 is the number of subs.

Moderator Edit: Corrected ! to 1

There are two types of dedicated accoustical room treatments, one done for bragging rights and one done after careful measurements and analysis. One needs to decide which as a first step.

More casual treatment, like adding carpet to deaden an over-live room, can be less precise and still reasonably effective.

I have seen Trueplay deal well with the second, no clue if it has the range of adjustment or computing power to deal with the former.