need to upgrade???

[headtrnr 10+ year member]

hey all i was just wondering if you think I will need to upgrade my stock electrical stuff

i will be running a ED 9.1 and a 4ch of some sort that puts out 100-120x4

i had a 600x1 amp and a 300x2 amp in my civic and i was good but since i have a different car i want to know if i will need to upgrade to big 3, battery, or alt.

I don't know the amperage of my alt so that is kinda throwing me off

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[Colt9699 10+ year member]

doing the big 3 would be an excellent start.

Then see how things go from there with voltage drop.