Do speaker cables need a burn in period?

Give them 300 hours of play, whatever you've got or going to get, and tell us what happened. The length of burn-in will vary, usually the better the cables the longer but not always.

Oh yes, don't pay much attention to how they sound during this burning in period unless you want to have fun. Give them a time.

Yes. Heed the advice of everyone here. You'll notice the biggest changes in the first few days to a week and gradual changes thereafter but it will take time.

All the best,
Nonoise

My Audioquest speaker cables were purchased used, so i am guessing that they are already broken in. So far, all the responses are in agreement that they do need time to settle down, whereas from what I have read elsewhere there were more nays than yays. I thought I would ask a proper hi-fi community the question. Thanks for all your replies. 

Burn them in at 110db with analog source only !
Just kidding. But use various music. Don't assume that they were fully burnt-in. Do you know how many people, not audiophiles, sell their new equipment because in fact it was not properly burnt-in and naturally they didn't like the sound !