I have an Alpine MRP-M500 and one Kicker 07cvr124. The amp is rated at 500w rms at 2 ohms and 14v. The sub is rated 400w rms. I am installing this in an 05 Impala police package. I was wondering if it would be possible to power the amp using the built in 100 amp auxiliary junction block in the trunk. It consists of 2 separate 50 amp circuits, both with fusible links and uses 8 gauge wire. It states that 100 amps can run up to 1200 watts. Would one of these 50 amp circuits be enough to power the amp? if not, how do I combine the 2 circuits? What else do I need to know?