Here is another URL from same site posted a while ago, very informative with links bringing to some manufacturers websites explaining "break in" in their own products:

http://www.htguide.com/forum/showthread.php4?t=9217

As for me, I cannot listen to my speakers properly today as my ears are a little deaf from a concert last night in Springfield, here in VA...

Axiom M60s, QS4s, VP100 Onkyo TX-SR804 Oppo 970HD Rotel RB-1080/RCD-1072 REL Q150E sub, PS 3