I have a factory delco head unit and have changed all speakers to kenwood aftermarket ones(dash, door and rear). I bought the car all original with blown speakers and power antenna broken. I replaced power antenna and got that corrected. I bought speakers from crutchfield to replace the blown factory speakers and now I notice another problem. My factory head unit seems to be losing right side completely. The sound from front and rear right side is considerably lower than the left. I have checked the balance and fader on the radio and that is not the problem. Does that sound like a head unit problem to you and also do you recomend anyone to fix factory radios? I was hoping to keep original looking the car only has 14,000 miles on it.