I have 2 Boss Phantom DVC 15's. 1250 Rms. I have them in a shared port box, I am using a Chaos Epic 4800ce class D monoblock amp @ 1 ohm which is 4800x1 I also have a 5 Farad Voodoo Capacitor. My queston is the lights dim a little bit still.what would be cheaper? Getting a bigger alternator, or adding another battery and isolater.