If you can’t understand what I’m saying you don’t know enough to use that data. The objective here is to help the OP to design an absorber suitable for domestic listening rooms.
The objective is to make the OP satisfied with the sound. We haven't heard that setup ourselves and have no data apart from a picture with strong anamorphic distortion, which makes it hard to judge dimensions. OP also hasn't specified the speakers or gear he uses or the signal chain.
And what
@abdo123 posted was useful since it pushed the thread towards data and the ensuing discussion probably clarified a few things as well.
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@ripmixburn Please try measuring or, if you don't have the gear for that, try a series of tests with loudspeakers and your listening position.
Is there
any position where music/dialogue sounds good? If so, is it true for all speakers independently? What about for phantom center? What about for image consistency and left/right movements? If you find one spot where it's good, figure out the circumstances which make it good. If good only when your face is right in front of the speaker, how far back and in which direction can you go until you start experiencing your issues?
Does every spot on the couch sound equally as bad? What if you're lying down with your head on one of the end cushions? What about when slouching so that your head is resting against a back cushion? Does it sound bad when you stand?
At least eliminate the possibility that you can't fix things by moving your speakers around, changing where they point, or with EQ. Or that your gear settings aren't inadvertently messing things up. Then cue the room treatment.