My rear door speakers are messed up. They are humming, popping, and cracking. I know it has the bose sound system. When I turn on the care it says bose on the cd player. Im confused if I have to get special speakers to hook up to the bose system, and all that. Can anyone point me in the right direction of what size rear speakers I need, and if I need a certain type, or brand. Thanks for any help!