They need a very long time to do the break-in thing, like 2 or 3 months. I've found interconnects to not make all that much difference in a system due to the low level signal that they are passing. However the CST's DO make a difference. Give these a long time to do their thing. Then one day you will notice that for the past couple weeks the music has been sounding better.
Anyway, that's been my experience.
Anyway, that's been my experience.