What could be instead of side walls?

i have a sin to place a tv between the speakers but that's where i have my whole point viewing ld-music video collection that i have. also viewing vcd and dvd music videos as well. so tv should stay between.
the equipment stand is also standing next to tv between the speakers. so the only thing i can arrange right now is to remove the equipment stand from the inner space and run longer ics to amps thus "clearing" the objects standing between the speakers.
did anyone try to get a granite slabs from the monument shop?:^)

Before I finished my Basement( which included a dedicated audio room) I was using the Argent Room Lens.
Placing one on each side of the speaker and one in the middle.
It created sort of a boundry that allowed me to tolerate the sound.

I place my speakers along the long axis of the room by preference. My speakers are very far from the side walls and have terrific focus and imaging.

In some of the better articles on speaker placement they suggest that you should separate your speakers as far apart as possible to get the largest soundstage, HOWEVER, when the image begins to break up you have gone too far. Since you can't get further away from your speakers (i.e. a distance equal to the speaker separation), this might suggest that the speakers should be moved closer together.

sorry for misleading.
recently i've updated my measurements and it figures that the listening distance is between 9 and 10 feet depending on how i want to sit in my couch.
the distance between the speakers is also 9...10 feet.
all i did so far, i moved them closer so the speaker drivers is closer than tv and not on the same level with tv and the audio stand and move them a-bit closer so the listening distance is now between 8...9 feet with the same distance between the speakers.
the stage is stabilizing but on several recordings is still chaotic.

Marakanetz:

If you would like to have an idea about what the situation is without the TV in between or for serious 2 ch listening, you just can place a blanket over the TV and its furniture (if any) and compare. The only this requires is to leave the bed neat and tidy again..... or if you prefer do it late at night and keep it secret!!!