Bought my x300 a few weeks ago.

All the speakers sound blown, they rattle horribly with any base whatsoever in any song.

I would like to start replacing them one pair at a time.

Can someone tell me how many speakers there are total, their locations and sizes? Someone also mentioned a sub woofer, where is that and what size?

It's been a long time but I use to mess with car stereo stuff when I was a kid.

Only thing I am concerned about is removing the door panels without breaking something.