Mitch, As a rule, as you go up in expense with the Nordost cables, you get "more" of the qualities of the lower cable. If they cleared up the sound of a dark tube preamp you should expect more of the same. If you like what the Blue Heavens bring to your system, you will like the Red Dawns even more. I loved my Red Dawns when I had a Mosfet amp and a tubed pre-amp running KEF 104s. However I couldn't use them when I switched the amp and the speakers. Jim