Braro, improvement after adding the room treatments was very significant. I have them in all corners, in the middle where every wall meets the ceiling, and behind me where the walls meet. The front corners and wall-ceiling interface had the most profound effect but they all contribute. Check out this review for more info. It is a bit long winded but you get the idea behind the product if you stick with it.
In a nutshell, the corners act like megaphones. The sound pressure goes into the corner and when it comes back into the room it is like the corners are shouting at you. Just as if you cup your hands to make your voice louder.
In a nutshell, the corners act like megaphones. The sound pressure goes into the corner and when it comes back into the room it is like the corners are shouting at you. Just as if you cup your hands to make your voice louder.