Hi, welcome to Just Answer. I'm acuramstr. Is this a "Bose" system?
Yes it has 5 speakers. One in each door and one in the rear tray. Here's A picture CLICK HERE the door speakers are 64 cm 6 1/2" and the rear woofer is10"
one last thing i am replacing my factory bose cd player with a pioneer 5100 and all of my bose speakers that are in the doors with boston acoustics sL60 and i am using a 300 watt memphis 2 channel to help push all of this and to take a load off the cd player....do i need to replace the 10" woofer as well