My side panels can easily be removed as they are hanging with picture frame wire and are not that heavy. It is very hard to deaden a room unless you cover the entire walls/ceilings with treatments.
Treating the first reflection points improves the overall sound as your not hearing the same sound arriving at your ears at different times, just the direct sound.
If you try the clap test, my guess is that you will hear an echo of your clap off the walls.
People think acoustic panels are only designed for recording studios, this could not be further from the truth.
Once I added my FRZ panels I immediately noticed the clarity of the music was more accurate and detailed. I've proved this with Blind listening test where I've had users listen to the same songs right after the other. In between songs I would either remove or add my panels and they would tell wich version of various songs sounded better. The majority of the time they picked the song with panels added.
