The door speakers are 5x7. I pulled my tweeters out when I installed new 2 ways in the front door but don't remember their size. But I'd say about 1.5". Not sure about the rear deck woofers in the audiophile, but I think they are 6x9. There's been some discussion in other threads about aftermarket speakers & subs, with a lot of good information. You may want to read through some of them when you have some spare time.