It's always interesting to see what Rob comes up with. I am currently testing a mains cable that "busts RF" better than anything yet that I have heard. Here is a photo and it is called the High Fidelity Reference Helix:
Unfortunately, it is obscenely expensive (it costs as much as the DAVE) but the point of the exercise is to see whether the DAVE would scale to something like this and to my dismay, it does. As nice an improvement as something like the microRendu provides, it pales in comparison to the sheer clarity, enhanced tonal body and vivid dynamics that comes with the magnetic technology that this mains cable provides.