Electrical upgrade necessary? 600W

[sprblk]

I asked this in general a few days ago and am looking for more opinions. I have a 2008 2.5l Altima coupe. The stock alternator output is 110a. I am only running an XD 600.1 to a 10W6v2, but am concerned about the added strain on my electrical system. When idling and bumping pretty loud, there is VERY slight headlight dimming. It's really only noticeable against a wall. Should I look into upgrading any of my electronics? Big three? Battery? Should I just forget about it and enjoy my music? I know people run much more demanding setups on lower output alternators, but I've never been exceptionally lucky in the automotive department and would hate for my audio investment to cause me problems. Sorry for asking a similar question a second time, but it's been killin me. Thanks.

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[sacsking916 5,000+ posts]

big 3 for sure. that should fix the issue, its not like your pulling that much amperage from that amp

 

[Imtjnotu 5,000+ posts]

ya atleast knock out the big 3.....ur not running much power so that should help with that little bit of headlight dimming