Okay I have a Pontiac Sunfire with Pioneer Mids and Highs, a Kenwood 50x4 head unit. I want to get two Kicker S12L72 and I'm wondering is a ZX1500.1 Amp gonna power those or should I look into a dif amp, I also just put a new battery in the car but I'm not sure if it's gonna have enough juice, I'm no expert on this stuff but the battery says it has 650w of starting power, just looking for some advice