I Have 8 guage power wire running right now and the ground wire is the exact same kind of wire , The amps are pretty much the same size wise it is the Rockford 150s , so im not really upgrading but i find the LA amp to be a bit shaky i think it is way overated than what the specs acutally show because it shows that it can do 60w per chan at 4 ohms and the Rockford is showing 37.5w per chan at 4 ohms , But i looked under the hood and near the power cable going to the amp and there is no fuse , so im not even going to attempt to put it in.