In my experience, with my system, power cords make a clear audible difference. I have therefore ended up with the power cord that sounds best with each component after many years of trying different cords. This has not turned out to be the same make of cable as my interconnects and speaker cables.
With my Modwright-Sony 5400 "transport" the Audio Magic Clairvoyant Liquid Air AC cable sounds more natural, more musical, more analogue than any other AC cable I have tried with it, including Lessloss, Kubala Sosna, Cardas Clear, Cerious, Combak Harmonix, Verastarr Grand Illusion, and others. The Liquid Air cable is not great on any of my other components. On my Pathos TT amp, for example, it sounds thin and lacks bass and overall dynamics - I assume because it is limiting current.
I am using the new Lessloss C-MARC power cable between my Bybee Stealth power conditioner and Modwright PS 9.0 power supply for my modified Sony 5400 player. While not broken in yet it is clearly a very dynamic, very "alive" sounding cord - similar in a lot of ways to the Verastarr Grand Illusion 2 that I use on the Pathos TT. The Verastarr replaced a Cardas Clear Beyond AC cord which is a good cable but softer sounding with a slight rounding of transients at least on the Pathos.
I intend to "cable cook" the C-MARC AC cord and also let it play for a couple of weeks. I will report back once it is broken in.