Hello, I am strongly considering getting some FI BLs. First, i have to say that i am very impressed with the videos I have seen of what these subs can do. I have not heard any in person, but i also hear the Sound quality is amazing. I have a good understanding of car audio and installs, im no expert. Here is some questions i have: looking at the FI BL 12" "Re: 0.75 Ohms/coil | 1.5 Ohms/coil" what is this? i thought the D1 and d2 options where ohms loads per voice coil? I have made one slight mistake on an ohm load and fried a very good sub, cause my calculations were less then 1/2ohm off. If i buy 2 FI BL 12"s can I safely run a D2 off a single channel amp? Running in parrallel would have to run at 0.5ohms? I listen to Hip hop/R&b and rap, what would give me the louder, bass for all sorts of music, either 2 BL 12"s or a single BL 15". I have 2 kicker 15" L7s and they sound great for the low deep bass, but sound like crap for anything else. Right now i am running a MA Audio HK802SX amp....any other recommendations??