Hey guys. I need some advice on my built. I currently have 4 × Dd815 D2 subs and 2 x DD m4b 5000rms monos. I have wired the two subs at 0.5 ohms so im basically running 2 subs per amp. I have a upgraded alternator of which im not sure what the amperage is and i have 4 kinetics blu1800 at the...