adamdea
You are not a sound quality evaluation device
At most Watts says that certain RF conditions can generate problems which somehow vary with mains cables (note no indication that this can produce predictable or consistent results for different mains cables) but that this goes away with a decent rf filter. Nb he implies that this is not an issue with his recent products.The designer of Chord electronics agrees with LFD. Remember this?http://www.pinkfishmedia.net/forum/showthread.php?t=157754
And John Westlake too I believe.
This takes us back to the point -I seem to remember Jim
wrote an article about it- that plaiting mains cables is not a great way of making an RF filter
Edit: here it is
http://www.audiomisc.co.uk/cables/mains/StringTheory.html