When I bought my speakers, the dealer loaned me a pair of Nordost Purple Flare speaker cables to try. At the time I had some cables I'd made with Monoprice 12 gauge CL2 wire and Blue Jeans Cable locking banana plugs.
He told me to install the Nordost cables and run them for two weeks, and that when I got accustomed to those after the time, change to mine. He said that's when I would notice the difference.
Two weeks of listening go by, and I rolled-up the Nordost cables, installed mine. I really wanted to hear difference, and was told I would. Nope, nothing. I listened for another week on mine, swapped then out one more time. Still nothing. I returned them.
Now I've been on those same cables for 1-1/2 years. I bought some 50 feet of Canare 14 gauge 4-conductor cable, figured I try it on my LS50's because for two month I had the Monoprice but with cheap Monoprice banana plugs. I made up nice cables with the good BJC locking banana plugs and this $1.19 a foot cable. Still no difference, but I like the look of my new cables better and they won't fall out.