What will I need to run all my amps

[CodyDaGoat]

So I'm going to be upgrading my subs within the next few moths.

I have 4 speakers with a 1000w amp right now.

I'm going to have two 15"s both that can peak 3800watts so I'm going to have two one channel 4000w amps to run those.

I was thinking about an alternator and maybe two batteries. I have a capacitor for the head light dimming issue I had before right now. How big of an alternator or two batteries would I need for all of this power

Update: I'm putting 2 power acoustic bamf-152 3800w subs with a custom enclosure. And I will be running two 4000w monoblock amps. I have another 1000w amp hooked up to 4 pioneer TS-G6845R speakers. I'm pretty sure the stock alternator is in there, and I have a 3.0 farad capacitor.

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[garychoffmann 10+ year member]

Knowing the actual equipment will help. Amps/subs etc

 

[garychoffmann 10+ year member]

What amps? A cheap 4k amp is not going to have the same power draw as a high quality 4k amp.