I do think the Dart power cord is a little cooler sounding and has more energy in the middle frequencies. I even raised the volume a bit on my subwoofers to balance it out. It is especially beneficial to vocals- primarily women’s vocals.
There is an enjoyable quality to this power cable that has improved my listening experience. It is a liveliness that was not there with my previous cable.
So, I have just completed treating the AC prongs with the NPS-1260 and that usually means that it’s a keeper.
ozzy