Front or Back wall diffusers

Also, about 6 years ago, when drawing the original plans for the house of stereo, GIK told me that the front wall should be addressed last if at all. Just saying.

That's interesting. After I fully treated my room I noticed that my music wasn't very lively and imaging wasn't very good. I began to remove panels from the front wall and the more space on the wall, the better it sounded. Now I have no treatments on my front wall and music sounds better than I could have hoped for. Listening to large scale classical I'm experiencing a wide 3D soundstage with concert hall ambience. 

It is recommended that the wall behind the speakers be reflective in nature, so that the sound develops properly. On the contrary, the wall located behind the listening position should be absorptive, so that the rear reflection of the sound does not interfere with the perception of the stereophonic image.

 

Weird how you seem to answer your own question.

@avl1947  I agree with you. Absorbion behind the listening position. I'll add that the corners of the front and side walls will often need bass traps or absorbion panels. This not only controls bass, but helps create and shape the soundstage