...I have two Kicker L7 12 Inch? SoloBarics, 1500 watt rms kicker amp mono, 10 farad capacitor, and an Optima Yellowtop battery the biggest I could find. I am being told I need to now buy a dual-battery isolator, and another battery to put in my trunk. Is this right? Also do I need 4 gauge wire running from my battery to the 2nd battery in the trunk. Any Car Experts Please help??