Lancer es 02 woofer and amp installed

Ok I just got a 12" Volfenhag woofer installed to my lancer which is supported by a 400w amp and my front 2 way pioneer speakers and 4 way back speaker powered by another lil 160w amp...anyway my question is should i replace my car battery and maybe get a better one for my car...cuz i feel it running a bit slower than usual now that i got my sound system hooked up...so what should i do?

Try using a 1 farad capacitor