Cardas Clear breakin. How many hours needed?

I can not disagree to other opinions, but i for sure (after 25 years) leave all silver along. I just don't feel like taking another chance.
A speaker designer told me that cables that needs brake in isn't right.
I don't say that! When he came and set up my speakers it was done in 2 hours and it sounded great. If you don't like your Cardas Clear, can you please explain what you expect to change after this so called "break in period"?
Oh, also, if you ever get in contact with anyone designing studio monitors, Genelec, Barefoot Sound (Thomas) you should ask them this question. Then you can't say you talk to people knowing nothing.
I have asked this question and guess what they told me ;-)

Break in period with cables, especially with cables, is real. It only takes purchasing one, and you will know.

Now.... if you don't believe in cables, as in "cables do not impact" sound, you clearly do not believe in break-in in .... cables. 

@jasonbourne52
No wonder why people think that audiophiles are insane! Copper sounds different than silver? LOL!

With capable ears listening to a well matched audio system, some people can hear a notable difference.

Even interconnects built with TPC/OFC copper vs. quality OCC continuous copper can sound different too.

If one component of the audio system chain is sub-optimal quality or poorly matched, it can be more difficult to hear a difference.