I recently installed an aftermarket classic am/ fm radio specially made for a 67 Mustang and a separate CD changer. The CD changer is in the trunk. For the life of me, I cannot determine what is causing significant static with or without the vehicle running. I've already tried a new antenna and I get the same static. So, it's not the antenna. Some folks have said that its the aftermarket radio. But I called the shop who makes them and they say they've sold tons of these units and have had virtually no complaints. They say they'll replace if I return. But I really don't think it's the radio. I think something in the vehicle is casuing the interference. I had a friend install the unit, perhaps he messed something up. Not sure. Ant ideas ??