Getting them off the floor will certainly make a difference, concrete slabs are an ideal start point as not expensive.

Have you used or got DSP control options to try too like boundary and bass tilt etc?

If you have the tools you can also try to get a picture of how bass heavy the room is by using REW.

As a trial and if you can be bothered, plonk the speakers on some sturdy chairs or similar, aim to get the bass drivers away from the floor.
Try some music and compare.

I had some stand mount active ATc 50s in a a similar room environment once and getting bespoke stands of around 60 cms in height, about twice the normal height, made a tremendous difference in controlling the bass. They are really designed to have their mid units at ear height, which this also achieved so it was a good solution.

Check out GIKs site and you can get good advice over email. They will likely suggest bass traps, first reflection points, treating the back wall etc. Gives you some food for thought and compared to new (Meridian type) hi fi is cheap in my view. I am trying some at the moment. There is a 30 day return option.


Main: Marantz SR8015 / Polk Audio Reserve R500 / Bang & Olufsen Beolab 4 / Arendal 1961 1V / Oppo 203 / WiiM Pro Plus / Apple TV 4K

Spare: G68ADV, HD621,DSP5000.2 & DSP5000.2 HC. ATC SCM20PSL, C3C. Rotel RMB-1077. Bang & Olufsen Beolab 1 & Beolab 7.1. Kef Q150. Dynaudio Xeo 2.