Let's only consider the main couch and ignore the side one
The back wall mounting option, as jostenmeat says, is not good. The speakers would be way high. That leaves only the side walls or the speaker stand for the RR.
Some in walls have adjustable tweeter direction. I actually have more of an issue that its so directly behind than I do having it that high, even if that may or may not be undersirable.
I've checked your receiver and it's only 5.1. There's no 6.1 or 7.1 option. If it has a mic to calibrate the system, it may have at least some volume adjustment for each speaker, please check the manual. That would allow for getting the front pair and the rear pair in balance.
I would imagine that all modern receivers have adjustable gain per speaker. Especially if it has auto cal, it just must have it I imagine.
It might be an illusion due to the photos perspective, but it seems to me that the right side wall ends before the primary listening position. Mounting a speaker in this position would not allow for rear effects, unless you point to the back wall and count on reflections to provide the rear effect (would that work?)
Not very effectively I think. I was even pondering the idea of mentioning bipole surrounds for greater coverage, but that type depends on reflection more than monopoles would. Since its not an assymetrical closed room, I bit my tongue on that one. But you never know, or I sure don't, because I've never tried them yet. A personal taste in any case as well.
I think if he scooted up the couch a foot or so, and the rt side speaker was as close to the edge of wall as possible... it might work out. 90 degrees should be perfectly fine.
For the pictures it also seems to me that the primary listening position cannot be on the right of the couch because the TV is not aligned to it, nor are the front speakers. Will you align the TV and the speakers to the right couch position?
This is a good point. And the further the left-front speaker is away from those boundaries, the better IMO, but YMMV, and it will take some experimenting in placement. For sure. Alex, make sure to leave extra speaker wire until positions are finalized. Im talking on the order of a month before you cut the extra off.
For me it seems that the best option would be to get a speaker stand for the RR and fix the base to the couch. I don't understand why this would not work. Jostem, could you please explain?
Sure, I can explain my opinion. For one, the loveseat on the right is scrooed. All pans will be on the left, all of em. But the thing I worry about most in that situation is how darn close the speaker is to the head. I guess it can work out... set the gain WAY low. SPL decreases exponentially with distance, or vice versa. I think if I was to put it that close, Id want the other that close as well? But then with two viewers, the surround from the opposite side could be blocked my a person's head? So, then, if you mount high enough, it just might look rather funny? Oh I don't know man. Also, with the third chair that he mentioned, that person would again have all pans on the left.
I think mounting on wall is the wtg. Or in-walls for clean look. If Alex goes to the extent of fishing, I vote to fish for rears as well. Just for ease of future additions. If he is doing half the work already... maybe? Whether they are mounting plates, or having wire stick out. A bit of ugliness that hopefully can be minimized. I think 7.1 would work quite well there. My 2 cents. Hopefully some of our resident installers might see this and chime in.
