lucid

I wouldn't even bother to install a .5 farad. Besides the power you're talking you don't need it.

TepEvan

If I remember correctly, the rule is 1 farad per 1,000 watts. I have around 1000 watts in my subaru and don't have a cap. Even though I'm sure I should probably just throw in a .5 farad cap just for the subs. But for 180x1 you don't need it.