I have a 98 volkwagon jetta with a really powerful stereo system how do i keep my

[Amanda B]

charge? ok here is the deal i have a 98 jetta and i have a stereo system that is pulling alot of charge. I have two rockford fosgate T2 12" subwoofers and a rockford fosgate 2500 1bd amplifier. my alternator is 120 amps i have a optima yellow top battery in the front i also have a kinetik 1800 battery this is not enough my lights go dim. What can i do without replacing my alternator?

 

[gremlins the movie.]

power cap and bigger wires for the power. or go smaller amp or an even bigger alt or add a battery in the trunk. that's about it.