Electrical System Updgrade Neded Y/N?

This is what im running

A pair of Infinity Perfects Kappa's 6.1 Powered by a ALpine MRV-t320 using it at 80WRMS*2 @ 4OHMS. So this thing MAX will DRAW 160WRMS.

THen im running a JL audio 12w3v2 D2. Powered by a Phoenix Gold Tantrim 300.2. It is getting close to 340WRMS *1 @4ohms.

That means the maximum power used by my system is aaboout  500WRMS. now the car this is in is a 1999 Honda Civic LX 4dr. Usually i listen to rap but lately been listening to other type of music mostly Punjabi Mixes. WHen i listen to rap eg Ludacris the bass in these songs is insane when i play ludacris i have to turn the bass volume to about 2/15 on the deck otherwise the bass is just insane and my lights dim. I like the bass i get when im playing ludacris at about sub vol at 8/15 but the lights just dim at this setting. my bass boost on amp is liek maybe at 2/18 at most. anyways ive read that lights dimming is not a good thing. What is my best solution here? The dealer were i got my speakers installed said that my car should be fine up to 500-600WRMs without needing any kind of electrical upgrade. But lights dimming is not a good thing. WHat do you guys suggest i do?

PS running 1 2guage to phoeinx amp and 1 8 or 10 guage , cant remember, to the alpine amp. and the deck is a alpine 9831 if you wanted to know.

well you do some simple math by checking the fuses on the amps, when you get this number, compare it your alternator, but if you are seeing the lights dimming, you may need to upgrade your alt, don't bother with caps.

I called the parts dept. for my honda. If you look up replacement parts often times they list it, but my guess is its about 90-110. you are at point where you don't really need to upgrade anything, but you could replace the cables on the bat and alt to a larger gauge and this may cure it...