Room treatments behind or between speakers?

'Tuning' the room can provide significant improvement in your sound. I use both wall units and free standing ones, at first reflection points. They have provided 'better sound'.

Always start with primary reflection points on walls based on listening location/sweet spot, for biggest bang for the buck, and add from there or not with secondary or lower reflection points if needed.

Thanks guys. I have already treated my first reflection points on the sidewalls and it made a big difference. I have Realtraps bass traps too. Now I am just wondering about front wall absorption, directly behind speaker, in between speaker, or both?