lights dimming

i have a new system in my car the 2 12'' s are ran off of a ma audio 4000w rms amp my lights like almost shut off when my bass hits there hooked up to run at 2 ohms i have a 20 farad cap and an optima bat with 0 gauge wires throughout.......what do i need to do to help or stop my light from diming so much if someone could help me out like write me an email or sumthing it would be greatly app. thank you very much and oh yeah the systems in a 2000 jeep cherokee 4.0 sport thank you

time for a alternator upgrade. look into irragi alternators High output alternators (the company) powermaster You should be looking for the highest amp alternator you can buy 270+ amps, should be about $400-$500 But that is the ONLY thing in the car that can make power, nothing else will make the power that amps is going to draw, period!2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR

2007 USACI World Champion

2007 World Record

2006 USACI Finals 2nd Place

jeff nailed it on the head. also, the search button is your friend. This topic has been covered many many times.

so u have a HK4000D right?  just be very careful dropping below 11vs because that is where u smoke amps...