Acoustic panels on ceiling

Thanks @atdavid. Very helpful 

I measured from the speaker face to my  listening position by using plumb lines to place tacks in the ceiling, ran string through then, creating the angles, then made the center of the panels halfway the distance. 
See my system pics for details. They hang about 10" from the ceiling (9 foot ceiling in this space) 

Thanks @bimmerman2 ! 
Very nice system by the way. Gorgeous looking room too

Just an update: for those following.

I installed two GIK Acoustics 242 panels for the ceiling today.

I posted one picture under my System.

Thanks everyone for your help on this thread. I am very happy with the results.

Special thanks to @atdavid. We don’t have to be enemies. This is a hobby for me. We can both enjoy. Our own way, even if it is different

Is  GIK Acoustics 242 panels sound absorption panel?