Like most people who like to save money and keep their stock head unit, i choose to play my iphone through the ipod to tape wire. For some reason my back driver side speaker crackles when i do this. When i am on AM/FM or CD is doesn't crackle at all. Before i got my iphone i had an android and this problem never happened. I also bought a brand new mp3 to tape line, still have the problem. PLEASE HELP :/