About the setup: I'm mounting rear speakers on the rear (stone)wall. "Hotspot"/couch is right against the rear wall too, so rear speakers'll be sideways on the wall, facing each other and tilted down towards the listener. Distance from the listener'll be about 150cm horisontally and 150cm vertically. Room is 380cm long and 410 wide, and there's no other possible location for the couch (or the speakers.. on wall mounts high on the wall is the only choice).
And then to the question: Should I use a wall mount in which the speaker's side would be 15cm from the wall (cone's distance from the wall ~25cm), or a wall mount in which the distance would be only 1-2cm.. (K&M 24185 or 24195).
The more away from the wall the better, but.. listener's ear'll be only 20cm from the rear wall, so with the longer mount the speaker's cone'll be ~5cm farther from the rear wall than ear. And thus I have to turn my rear speaker to slightly face the rear wall. Doesnt sound like the greatest idea. Then again, using the smaller mount will place the speaker really close to the wall.. (but then I can turn it slightly frontwards to face the listener).
Which of these dismal solutions would be less crappy? Any suggestions are distinquished.
And one more thing: Speakers are Tannoy Sensys 1 (not DC model). Not the best choice to be attached to wall, but these are the toys I have to play with, for the moment.