I have a carpeted floor and part of the reason for the plinths is well, they look good! They also feel more secure on them and I have kids. I have used the bungs (in the rear - mine have no front ports) but that was when I had the speakers in the corner of the room, I now have taken the bungs out. I'm really happy with the soundstage, so much so there is the illusion that the voices are coming from my centre speaker and not from where the sound is really coming from.