I have been running the Ultra Clear IC on my system for about a week. I use them between an APL3910 and ARC ref1 pre. It replaced VD Master LE XLR cables. I can say right off that there was significant improvement in all areas that matter. Resolution, bottom bass, pace and layering of instrument and the utter naturalness of vocals. I currently have an ARC Vt130se amp and I would say the effect of the Ultra clear IC on my system was equivalent to an amp upgrade. My speakers are Wilson Sophia II. My system sounded good before, but I can honestly say the enjoyment factor increased by several magnitudes. Music is simply more musical and involving. And all this from a cable???