Hi @alec_eiffel, @Magnus,
I have followed your recommendations and also read through the “pdao” threads on Forum-Hifi for which @alec_eiffel had put a link in that topic before.
Most importantly I have been able to convince my wife to open the large window doors between the Home Theater room and the Hi-Fi room. The opening is 44% of the surface. It is dead center. The volume of the room has been multiplied by 2.4! It is now 92m3: L925cm, l375cm and H265.
I have made following measurements. Please let me know your comments. Especially if I have done something wrong in the measrurements or using the templates from “pdao”. The sweep I have used are the one provided by HAF for left and right channels, as I am intending to use their services later on.
All the acoustic panels I have mentionned previously are installed. There is no acoustic panels in the Home Theater part of the room (yet!)