Hey guys, Ive got a question. I have a pioneer head unit in my 94 camry, just a cheap one. My brother gave me a much better pioneer unit that he didnt want anymore. I went to swap them and everything went fine, same plugs and everything, until I plugged in the new unit. When I was all done, there was a very quiet static noise coming from the rear speakers, even with the car turned off. I swapped back to the other unit and this didnt happen. any ideas on why this would be happening? Im very new to car audio... thanks guys