sorry for the slow reply , what LOC are u using? active LOCS , will want a remote on to turn on like an amp does , provide this from ACC , (cig lighter) if u have a LC6i , it detects the sound(voltage) on the speaker input and turn the amps on! if your have a premo sound system. when your factory amp if plugged in , it tell the ICC to turn on 100Hz filters to the front and rear speakers. if your hooking up an aftermarket sub , this is not wanted if sorcing audio from the front or rear speakers. disconnecting the amp will allow full range of freqs to the speakers!