Hello all, my set up is pretty basic..kenwood radio and eq, kicker 1200 mono class d amp for my jl 13w7 and kenwood 100x4 interior amp. Also I have a optima red top under the hood and a stinger battery in the trunk all ran with 0 gauge from and I did the big 3. I still have the stock 100 amp alt which im replacing with a 180 amp and also, I never play my system with the car not running. Right now my lights dim and at night when I press the gas pedal my lights get brighter, so will the new alt stop that? And whats the highest that I should have the gain on my sub amp? Thanks in advance for any help