I have been an audiophile for over 40 years and have owned a lot of very high end equipment. About 3 months ago I bought a pair of CT-1 interconnects and speaker cables after learning about them on this forum. When I first put them in and listened immediately, they were a bit closed in. But 24 hours later, I knew they were something very special. I have owned the best of Nordost, MIT, Analysis Plus, and others. There is just no comparison to the HF cables. This is considering that these are the lowest level of HF cables which cost a fraction of many of the other cables that I have owned. As these cables continue to improve, I have to say that for me, this is the biggest improvement that I have ever made to my system. The sound they allow to develop is just so pure and easy to listen to. They are just so incredible that I cannot even fathom how good the higher level High Fidelity cables are. I hope I can someday afford the Ultimates. As has been said many times, they are unique game changers even at the lowest level. I have not heard any beyond the CT-1's, but I am not at all surprised by the comments that people are getting better sound by spending more on these cables than they do on their electronics and speakers. In fact, I would be surprised if this were not the case considering the improvements that I have heard with the CT-1's. They are just astounding.