@ arkin: the small pods are the tweeters. if you can, place them on the A pillar like in my car but you will have to drill a small hole for that. else, it can be concealed in the door too, next to the door handle. a good installer can do this. these days, manufacturers dont provide tweeter pods with the package except for very high end comps.
below the tweeters are the midbasses, it will go into the stock speaker locations.
below them, the white things are the crossovers which enables the tuner to filter out frequencies to the midbasses & the tweeter (high frequencies go to the tweeter & low frequencies go to the midbass), the reason you get good quality sound. a good tuner can tune the comps perfectly. you can keep the crossovers hidden under the dash like in my car or if you want to show them off, you can install them on the doors.
"Satisfaction" is one song you will really enjoyed in a nicely tuned & 'amp'lified comps.