A number of manufacturers manufacture different lines of power cords designed for digital components, for instance Shunyata. The digital is designed primarily with noise reduction as opposed to passing massive current. I haven’t experienced a really heavy duty power cord labeled digital. But, then, for a given system it is typically most important to try several cords and make a decision based on what they do to the sound quality.
Each company proports to one or more defining parameter or material that makes them superior… but it is so system dependent that it is not worth speculating on mechanisms and just seeking whatever sounds best. I have tried dozens of brands and texted for many hundreds of hours. I can only conclude that in low cost interconnects and power cords copper tend to be warmest, silver coated copper is midway, and all silver highly detailed but prone to shrill and fatiguing. Higher quality ones are completely dependent on the companies proprietary concoction.
