Hello all !!! I am in need of help!! I have my center console removed from 2012 yukon (huge PITA!!'). Installing two amps. One for new door speakers and one for subs. I want to maintain factory amp and sub as well as install the new amp for additional subs in rear. Can I tie into wires going into current sub or amp to get signal for additional amp in rear ..... Not power only sound ( and remote turn on???))) If so,... Will it mess up sound in any fashion?!!! Thank you!!