WHY did a new amp not fix my issue of only one speaker playing? I am not that good with this stuff but I check all 4 channels coming out of the radio and had juice. This car is new to me and I would think that I should have sound out of several speakers, correct? What i am saying is out of the sony headunit i have 4 channels that have power before it plugs into the factory plug/adaptor. I just replace the amp and still only have sound out of the passenger side door speaker. If i have 4 channels going out then I should have sound in all 4 of the speakers in the car or are the little speakers on the back wall just for looks in these cars? I would be happy with the door speakers but dont want to pull off the door panel for nothing. Help PLEASE.