Hilla_killa

so I'm a noob when it comes to installing these processors or whatever they are. I have a 13 370 with the factory nav and bose. I only want to add a sub and a mono amp to my system to get more umph. crutch field said all I needed was the audiocontrol lc2i to achieve this and still keep all my factory functions. is this true. can someone link me to somewhere that will help me or a build with pics and details. I'm a bit nervous as I don't wanna screw anything up with my beloved car. I have read here many of you have used this lc2i but just cannot locate on how to install, what wires to tap and so on. so if someone could please help me out itd be greatly appreciated. thanks