Thanks for the advice Jens
I have treatments at mirror points (as far as my room architecture allows) and then a KRK Ergo. Basically I've had to compromise as I have a home studio (although that is no defence on Gearslutz
Personally I found that placing the tiles in exactly the same position as a mirror reflection of the monitor, made a huge
difference to soundstage/resolution/tone/dynamics but it's good to know I can improve on this.
I will be exploring the ETC of my room but I doubt that I'll be able to re-position the treatment; if I get a better understanding now it will help when I design and build my next studio.
No pics at mo - will do one later if I have time...it's a basic rectangular wood frame with a centre spar that creates 2 square holes for 2 tiles to sit in...I padded it and covered in material and then hung it from 2 hooks in the ceiling.