Jack, I just spent considerable time trying cables for my Special 25's and it is on the Cable threads, something about nordost and shunyata. I did try the Nordost Heimdall and they were very nice, just a tad forward. I do not think that this was a fault of the cable but a characteristic of the speaker. Not a bad thing but with the Red Dawn the speakers were a bit bright. I ended with the Shunyata Gemini, not to be confused with the older lyra, a very different speaker cable. I also have spent time with the Blue heavens and I think it is a bit warmer than the Red Dawn.