70 amp alt. Will it hold up

[rico892002 10+ year member]

Hi guys, i have 97 honda civic and i just got a new kicker kx800.2 amp. But my alt. is only 70 amps, i wanted to know will my amp kill that alt. I'm going to be running 2 battery. And also do i need to run 2 battery with that amp. The gains are going to be running low because the subs that i'm going to be running doesn't need a lot of power to hit hard

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[iceteebone 5,000+ posts]

2 batteries won't help you. that second battery needs to get charged as well as the one under the hood, so that is more strain on a small alt. do the big 3 upgrade and hook it up and see what happens