I am installing a complete new system in my 93 Wellcraft 232 Eclipse. The system will consist of a Fusion 700i Head Unit, 4)JL Audio M650's(150W) max, 2)JL 10" subs in a bandpass box, all powered by a JL 700/5 Amp. Question is.. Do I need to run a second battery or just a capacitor? And if I do...