hmm.. then I guess it really was the previous owner who chucked them in.. cos I have the large circle grill for it, and I hear sound coming out. I'd take pics or even try to open it to show you but i'm no expert and have no idea how to do that hahaha :P
But anywaaaaay, on to the main topic and to make sure.. JL Audio upgrade > Bose stock system? Worth the upgrade?