To all of the above posts: I think the general stated views of the SX are correct. Whereas the SX speaker cables are a real improvement over the SE, the SX line up improvements, in my opinion, are in this order - RCA, XLR, Speaker. Having said this, even though the speaker cables comes in third place, in my opinion the SX still represents a major improvement over the SE, at least in my system and per numerous customer and dealer responses. I could live with the SE speaker cables for the rest of my life. However, when I switch to the SX I am very pleased and do not want to go back. In short, the SX speaker cables present a very noticably richer tonal palet with improved resolution top to bottom. They are also more relaxed, yet more dynamic at the same time. The RCA SX is flabbergastingly better ... one of those things you notice on the first note. They are extremely more resolute and relaxed. And the XLR SX represent an overall higher quality in everyway wtih noticably more bloom. John McDonald, president of Audience