Battery question

[American_Bass]

I have a 15 inch american bass TNT and a hifonics 2k watt amp. When im idle playing the subs my voltage goes down to about 12.8. I want to be able to play them while idle but they are to harsh on my electrical. Now I have the money but I dont know whether to get the big 3, a kinetik battery, or just a regular car battery. I dont know how much each one would help but I dont want to spend alot of money just for a battery so if anyone could help me out that would be great.

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[rfluvinmf 10+ year member]

Do the Big 3 and pick up a 55ah battery from micheallane.

 

[negolien]

Do a big three and an alt batteries won't matter if you can't provide an adequate charge.

 

[mylows10 5,000+ posts]

Big 3 definitely. what size wire you running now for the amp ?