I have had my D3 installed for about 4 months and this weekend I tried putting all the sound to the back of the car just to mess around. I found out that nearly nothing is coming out of the back/rear speakers. I have to put the fader all the way to the rear to hear ANYTHING at all, also when I go into sound profiles, I have an option for left, right and center but nothing for rear speakers (not sure if this has anything to do with it or not) The speakers were replaced to better pioneers when I installed D3. Its in a Scion xB. Any help would be awesome....thanks guys!