Hey guys I need help installing my amp in my car. I have an 09 escalade and I have no idea how to hook up my soundqubed q1-2200d to my factory HU. the amp only has rca inputs which is what mostly confuses me because Ive always used my phone as the input to the amp then an rca from the output to my cars rca input to use the factory mids and highs... so my question is can someone help me out with using my 2200 for my subs while still using factory mid and highs and HU? If I have left any information out please let me know. thank you.