I am with unsound in his assesment concerning driving your Thiels. You can go to Thiels web site as well and get more information or simply call them they are always willing to help. I have 3.6's and utilize conrad johnson electronics and can say from personnel experience that Thiels love quality electronics and will reward you with sound that will make your hair stand on edge when you do. Enjoy your Thiels and good luck in your search for amplification. When doing so keep in mind quality over quantity.
Chuck
Chuck