I recently installed at new Kenwwod DDX-470 head unit in my 08 Sorento. I love it and it sounds superb, bringing the stock speakers to life! I would, however, like to upgrade the speaker system. I pulled a front door trim panel to see what the stock speaker system consisted of. I expected a component setup but found a 2-way speaker in the door with the tweeter above in the sail a panel. I did not find a crossover like I expected. Question: Do I need to purchase a component speaker system with a one-way door speaker and tweeter? Or, should I purchase a pair of coaxial speakers for the doors and new tweeters for the sail? I'm also intrigued by that door speaker connector. It looks like there is a driver wire for both the mid and woofer followed by a ground for each. Is that correct? I have seen several posts about speakers but can't remember where they are. If someone has any experience or advice in this area or knows where I can find a previous post on the subject I would be most appreciative!