My experience with one run of two 20M Powerlink cables a few years ago was that the sound was a little " noisy " at first.
I moved two appliances nearby ( a television and an SSB radio ) and that did not solve the sound quality. We have much electronics around here. I then ran hard silicone conduit with the Powerlinks inside, and that solved the problem for the moment.
Along came Master-link, and that changed everything. One M-L run only, shorter mains/electrical powerlink connections close to each amplified speaker, with the result of much better sound being produced, including N.MUSIC and N.RADIO Internet sources.