I use a LessLoss C-Marc power cord on my Yggdrasil A2 DAC. It bettered a number of other power cords that I tried in that location. I’ve found my source to be the most sensitive location in terms of power cord effects on the overall sonics in my system.
I usually prefer non-shielded cables as I’ve found they allow a more open soundstage and better dynamics. However, on the source, a non-shielded cable can let too much noise through. The C-Marc gives a black background without closing in the soundstage. It’s also very lively, good dynamics, good imaging, and just a bit on the warm side of neutral. I believe LessLoss offers a trial period.