I wouldn't advise putting a pair of T3+ towers in a closet...
But they'll be fine in a room of that size...
The one thing you might have to be careful about is symmetry...
You said that "the room is open on two sides"...
Depending on the exact way that works out you may need to do some experimentation with speaker placement to get the best results...
In terms of imaging it is left-right symmetry that matters...
And specifically symmetry in terms of acoustics...
This sort of thing isn't really arcane... but good attention to detail can yield impressive improvements.
So, for example, if you have a tapestry on the left wall, and a big window on the right wall, your imaging will probably be poor.
(And, to fix it, you might want to put drapes on the window, so that "it's more acoustically symmetrical with the tapestry on the opposite wall".)
However, one thing that people forget is that both speakers, and sound, especially at midrange and higher frequencies, are somewhat directional.
So let's say that you have an asymmetrical room, with an open space on one side, and a wall on the other.
The reflections from the wall are going to be very different than the echoes from the open space.
The absolute ideal solution would be to build a wall on the open side - but that probably isn't practical.
You could hang a tapestry on the wall side, and put drapes across the opening, which would work really well - but, again, may not be practical.
However, even just putting a tapestry on the wall side would
help.
Now you'll have no close reflections on either side, a dead space on the wall side, and a somewhat dead and somewhat echoey situation on the open side.
(And, if the open space itself is relatively dead, and so not so echoey, then that could work pretty well.)
HOWEVER, a much easier, and perhaps better, solution would be to toe your speakers in very sharply (maybe 45 degrees).
The reason this is a better solution is that, by toeing in the speakers, you have minimized how much the side walls matter.
Now you have fewer reflections or echoes from either side wall...
Most of the sound from the speakers will reach the listener
first...
Then you'll hear reflections from the rear wall...
And, by the time sound reflects from the side walls, while it will still make a contribution, it will be far less obvious...
(And you can minimize that even more by making that rear wall more absorptive.)
I could go into detail of my setup and how far I want to evolve the setup in the future, but my basic question is regarding the T3+ those being purposed for large rooms and high power amplifiers and I have a small room wanting to run 5.2.4 with an Emotiva MR1.
Will I regret the fact that I want to use a pair of Airmotiv T3+ as my front main right and left?
My living room is basically only a 13 foot square piece of carpet, but the room is open on two sides into the small dinning room and kitchen.
My main viewing seat is only 8 foot back from all the equipment and they are spaced back about 1 foot off from the back wall.
My current front towers (Fluance XL8F)(46" tall) are good for movies but lack high and middle range clarity when playing music, I want to move them to the rear channels and have something better up front.
There is more details and plans but if these speakers don't sound good from around 8 foot away, then I need to change directions.
Thank you.