So this is my first post. Im hoping some 1 can help me!!!! I recently installed a new head unit in my car, it's a 2013 Pioneer DEH-X6550BT and it's connected to my 4 channel amp and for some reason my fade option on my headunit is not working, Just to clarify all 4 door speakers work fine if I leave the fade at 0 but If i fade the sound all the way to the rear there's no sound coming through the rear door speakers and if I fade it all the way to the front, the front speakers work but doesn't make them any louder they just sound normal. That's one problem the other is with the balance option if I turn the balance all the way to the right it does the opposite makes all the sound go through left. Hope some 1 can give me some advice, my fade and balance worked fine on my old clarion headunit.