John, this raisable back/sides is going to cause acoustic problems that you then have to fix. Woudn't it be more straightforward not to put that surface up in the first place?
I already use a "CHAMBER" like this, that I constructed, and is not convertible like this "appears" to be.
Acoustic Problems are part of Audio, but the local solution I use now (of which I hope this will duplicate) are far better and cheaper than trying to solve the problems globally (on the walls and ceiling)
That said, I have my fingers crossed as to how easy and effectively I can mimic or approximate my current acoustic chamber with this one. The current chamber is constructed of basically large stiff cardboard containers with significant layers of various density damping.
In essense, it is an acoustic black hole. Not anechoic, but VERY WELL damped from most frequencies.
My primary concerns with THIS Loveseat, is if the walls and corners will cause some level of standing waves or bass reflections that the present cardboard does not. So, please know that I am not touting this as anything close to a good idea, UNLESS the damping I plan to try is used. Without that, this would sound Awful

I just ordered this yesterday and HOPE it will allow for the sonic isolation I am looking for, so I can combine my 2 Channel and HT Systems and easily SWITCH from one to the other by simply raising the panels, and throwing on the extra damping.
We'll see. Until it arrives and I "actually" experiment, I am just performing mind experiments, based on my past efforts.
And I am repainting and remodeling and my significant other would not be amenable to placing huge Acoustic panels on the walls and ceiling, which would not offer the same reduction in reflection anyhow.
In 2 channel listening I just don't want to hear the Room at all. (Headphones with a Soundstage and Imaging) For HT, I am far less critical since ALL the sound is post production and engineering.
In any event, if it doesn't work, or I encounter a problem not clearly foreseen, there is always Plan B, which I already have on the mental drawing board.
More to come.