Hi, Have 1st gen (91-94) explorer with jbl factory system 4 speakers, sub and amp. My ? is right now amp in truck is running the 4 speakers and sub. I found another 1st gen amp. Could I splice 2nd amp to 1st and run 1st amp 4 speakers second amp subwoofer. Can I do it? If I can how?All is still factory. Thanks..trying to get info so I dont destroy nothing..thanks again