My first thought was that these looked like the old trays for coke bottles. How could they be effective? But, think of how sound has to bounce down all those wells and it starts to make sense. I flew a cloud over the listening position with the original absorbent cloud just above. The old cloud almost worked, but with the addition of the Space Couplers it was just right. I may try the RPG version, but for now my T-Fusors work fine for first reflection. Also, these are built to look as good as the wood on a guitar. I donít think you could find a cabinet maker that could build something as good for the same price.