You can't really bring the speaker closer because of the speaker grill and the fact that the circle opening in the door where the speaker grill sits is less than 6.5" in diameter.Originally Posted by ajdale
You will have to take measurements of the speaker you want to get and see how much space you have behind the door to work with....i can't remember exactly how much room there is behind there.
You can definitely do it on your own....there is a diy sticky on the page that i linked you to in my first post. It walks through a speaker install in a 3 series step-by-step and is very detailed with pictures. It shows you how to remove the door panel and where to tap into the wiring, etc.
I've done it myself many times...the first time took the longest (trying to figure out how to take the door off and how to mount the speaker)...but every time after that was a breeze since i already knew how everything fit together.
To mount a 6.5" speaker, you will need mdf speaker rings and you will have to bolt them to your door panel. You will then bolt the speakers to that mdf ring and seal around the speaker with dynamat or with a foam insulation so that the airspace in front of the speaker is completely sealed off from the air space behind the speaker.