Hello,
Behind the walls where i placed the speackers i have a kitchen.

I just set for the first time my m80 speackers 23.6 inch away from the rear wall.

I walk inside my house from kitchen to music room:

This change everything.
More depth and now i can listen music without thinking it's comming from the speackers.

About bass i had a full corridor dead zone in center of my rectangular room shape.
Now bass spread almost anywhere inside the first floor.

I think i understand the LFR1100 and dsp switch role now.

One of the Goals to get LFR1100 over m80 design is to help improve soundfield inside halls and rooms where you can let speackers breath anyway right ?