the width of the speakers Genelec

[dawid123123]

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hello i try my best in English.
create a new room.. I have smalle problem becoused I can't decide about width of study monitors.
my room width is 280cm.So I measured 25% is 70 cm width of monitors between walls but !...if I put it on 70 cm and changed the angle of inclination to 30* degrees to an equilateral triangle and the middle of the tweeter changed from 70 cm to 77 cm should I move the whole speaker stand back to 70 cm?
I add photos (there are 3 pictures)


https://ibb.co/yd2k0cg (https://ibb.co/yd2k0cg)
https://ibb.co/4JGbgmr (https://ibb.co/4JGbgmr)
https://ibb.co/PZ23j14 (https://ibb.co/PZ23j14)

[BertKoor]

Where did you read about this 25% rule?
First time I heard about it.

Here's a positioning guide that looks good to me:
http://arqen.com/acoustics-101/room-set ... placement/

It says these are just guidelines, not rules set in stone. It's a good start, then listen how it sounds and tweak from there.

You might want to try playing a sine sweep. That can reveal resonances you would not hear directly with playing only music.

Positioning speakers is about finding the right compromise.