I just got few days ago a pair of speake cable manufatured by Louis. I am not a cable believer, beyond the difference between materials. I had my CAM connected to Leben 300XS with QED XT anniversary. Once removed I could noticed in some music I know perfectly well, a deeper bass. That was noticeable and clear to me. For the rest my ears got used to it quick quickly. The sound is also natural but maybe the diameter of the cable improved a bit the feeling of bass. I am still comparing and testing against QED, with music I know. I am not saying in changed my life! but I could experience something different, that is a matter of fact.
Thanks Louis. I am so much in love of my CAM and SAHO XRS that cables are a secundary issue for me. Not a worry at all but I had to try.