Okay, I am going to get a performance alternator, upgrade to 0g wire, and get a performance battery. Should I get a D2 sub? Or should I just run this D1 @ 0.5 ohms? From what I have looked at stinger batteries, and alternators are the way to go. I really don't have any room for a second battery so I am trying to get one single ballin *** battery. I am confused on what kind of alternator to get. How many amps? I know get the best one I can, but I am running one HDC3 15 2000 watts off of a AQ1200 amp. Would like a 160 amp work? And I was thinking or an optima yellow top battery? I am a super noob at this, this will be my first alternator/battery upgrade ever so any advice on what to do is appreciated.