i have a pretty bad dimming problem (at least i think it is)

i have a visonic 1800 watt max amp that is 600rms x2 at 2 ohm and i have it turned down half way. it is going to a Rockford fosgate 300rms p3s sub and a Rockford p1 and i dont know the watt but the same power to it. and my light dim pretty bad. i just got a new Kirkland batt and an expo 130 alternator. this much watts shouldn't dim my lights should it?

 

Get a capacitor,

www.crutchfield.com

 

You need a capacitor, I have a 200 amp alternator and a 3.5 farad cap and I still will get a little dimming if I crank it with full bass. The cap really brought my system alive much more bass and the mid and highs stay crystal clear.
See sig. for system