I am asking for 2 sets of infinity kappa 63.5i's for christmas for my car. I know that they are good even though the perfect 6.1s are better then 4 63.5is put together. I am having a hard time choosing an amp for these. My headunit says it puts out 52x4 but im sure it doesnt even do that. The kappas are said to put out 225 watts. I need to know how many watts i need in an amp to power then but not to blow them. and it has to be a 4 channel. brands would be nice too but i only have a 150-300 limit. thanx for the help.