That's really a loaded question. There are endless variations, opinions, rules and suggestions to treating a room. I used all the above when treating my room but ultimately it came down to what sounded good to my ears and not so much following the rules to the letter. Start small and focus on treating your room to improve sound quality, not to look cool.
Front or Back wall diffusers
Front or back wall diffusers, I have a 14' x 24' x 8' stereo audio room with Wilson Sasha DAW speakers. I want to know which wall to place it on. I have seen many photos with diffusers on the front wall, this is the most recommended, but I have doubts. Please some suggestions.