I have experimented with pillows in the corners and also foam on panel.
The pillows in the corner were to simulate a bass trap and they work quite well. I think purchased GIK Impressions bass traps and they were a mild improvement over the pillows.
As for the foam, everywhere I tried it the sound got worse.
I've also tried pillows in the rear and along the rear side walls. No noticeable audible effect.
I've also experimented with the Stillpoints Aperture. In my room, they did nearly nothing. At my dealers, they provide minimal/moderate help on the front wall. I'd want to experiment first before commiting to $750/panel.
The pillows in the corner were to simulate a bass trap and they work quite well. I think purchased GIK Impressions bass traps and they were a mild improvement over the pillows.
As for the foam, everywhere I tried it the sound got worse.
I've also tried pillows in the rear and along the rear side walls. No noticeable audible effect.
I've also experimented with the Stillpoints Aperture. In my room, they did nearly nothing. At my dealers, they provide minimal/moderate help on the front wall. I'd want to experiment first before commiting to $750/panel.