ramz28

hey every1. this is my first jk and my first new car, im loven it so far, but i miss the bass. i have the stock sat radio no subs. i have a small sub with amp i want to install. how would i do this? power and ground are east but iread that the stock radios dont have an acc wire? can i use any acc? this is my install idea run power to batt + run ground to chassis run remote turn on to some other acc either cig or something. and for inputs to the amp it has a built in crossover to tap into the rear speakers. does that sound safe? and how does this affect warranty? thanks