Hi, It my first time posting and I need your help. Which amp is go with my speaker and sub. I have two old Infinity Kappa 63.5i and one 10" Basooka EL1004. The speaker rated 75 rms w/max 225 w, sub is 50-180 watt rms max power is 250 watts. Do I need two amp, one for speaker or one for the sub...