It's in section 5 of the rules. Also, when it says to register and become a fan of the website, does that mean the part where you enter your name and e-mail address or is it something else?
EDIT: I thought maybe I should include a link to the rules just in case somebody missed them. http://poc.sennheiserusa.com/contact_forms/rules/Final_Fantasy_Contest_Official_Rules.pdf
Edited, Aug 7th 2013 7:15pm by swisa
Sometime before the end of the sweepstakes, all entrants must either already be a registered 'friend' of Sennheiser's facebook page or must go to their facebook page and like it then register. If you are already registered, you don't have to like the page, is what I'm getting from it. Just to be safe, I would like it no matter if you are already registered or not. Would suck to actually win and get disqualified for something so simple.