From personal experience If I try and throw my 14k at my subs with fresh recones bad things happen lol Of course I run 6 extra stiff spiders and yes they do require a break in period. lol
To all those who state that you should free air your subs for break in u guys are killing me lmao!! Dont do that!
I use a 30hz tone on moderate power(moving about .5 inch) for 45 mins or so but it still takes me a month to gain full excursion and its proven to be louder.