[Sonic discount codes]

I called them actually not too long ago, I was going to buy a Xs power XP2000 battery along with my head unit I just bought Pioneer AVH-X3700BHS together tonight. But anyways, I called them to try and work out a deal and they weren't really wanting to deal. I told them I could buy both items from Sonic Electronix store ON ebay for $494.18 with free shipping. The lowest they were wanting to go via phone was $544.20. soooooo I just bought the head unit for now and will purchase the battery this coming up weekend.

[Question]

Are all mechman alternators 12v? or when you order them do you have the option between 12-14-16v? I've never had to order one, so forgive me ahead of time, Thanks!