System electrical
 

So I asked a question in regards to wiring and such and didnt get an answer. Or maybe it didn't post. I can't find the thread or I would've asked there. I will be running one set of b2 audio comps on an sax 125.2 and two sa12 d4 subs off an aq2200 amp. I can either buy 2 batteries or a 320A alt for my dodge nitro. Will the new alt be enough by itself or do I need a new alt and a battery? Or should I just get a battery for the rear and use stock alt? Thanks in advance for any help

Thanks for the link back to that. And I see one thing is changed. I went with the aq2200d amp and I'm probably going to buy a set of sa6.5cs instead of the b2 audio. Still wondering if I should keep stock alt and add battery in rear or if a 320A mechman alt would work by itself