I tried them and absolutely hated them. They made the highs shrill. Of all the tweaks that I"ve tried, they had the greatest impact. It was immediate. The sound was more detailed but the bass was reduced. I've seen that trick used before in amplifiers. I spoke with a well known cable company and was told that you can get the same effect by opening up the barrel of a locking interconnect. Reducing the ground contact has the effect of reducing the bass. With the bass reduced, you do hear more treble and midrange detail. It's a change that clearly audible. If you have a speaker that is dark and tilted toward the bass end, I could see where they could help in such a case. Otherwise, I'd say stick with the metal RCA's.
