Room treatments behind or between speakers?

What are you trying to deal with, what is bothering you when you listen.

Thanks Milpai. I look at your system page a lot. I love the simplicity of it. If you think your room is small you will think mine is tiny. It's only 9x10 but the rear is open to my family room.

Samhar, I am not sure what I am trying the achieve. I don't know what I don't know right? :). Like all audiophiles I am always looking to improve my system.

Nothing should go between your speakers except for the amp on the floor.

GIK told me put mine either side of the flat screen (they were working from a schematic I sent). The panels ended up directly behind (and mostly above) the speakers. These were the first panels I installed and they definitely made a difference. BTW - a while ago, came across a thread here on A'gon where a poster was citing an audio expert who claimed benefit to having a somewhat reflective/not fully damped surface behind/between the speakers. Don't recall the details well enough to explain the rationale. It's a school of thought that didn't seem particularly "intuitive" to me.

It's room dependent, and Milpai's treatments are a good example of absorbing bass then getting better imaging by using a middle panel.