I am planning on putting two 12's in my car. The only problem is that ]I don't know what to go with. It's either between the MTX TR4512-44 or the Rockford Fosgate R2D4-12. Can someone tell which has the better sound quality? Which one hits harder if they are going to be put in a 2007 Ford Mustang Convertible? They both cost about the same and they both have Dual Voice Coil (I don't know what that means). Which ever one I do go with, they will be put in a sealed box (if that makes a difference).