I need your help :)

& nbsp; Hello everyone, I am a newcomer among friends I want to illuminate the question marks with your help. 2 days ago, I bought my 307 1.6 HDI 110 HP vehicle, I am very happy, I am lonely distorting the audio of the CD player in the 20s, so I say that I wear an alpinee speaker in the front and back. I also researched how many cm are the front and rear speakers, but I wonder if my car could be different due to the model 2006 model car

I think you need to do a good insulation on the inside of the door, if you change the door inside the door, but you need to make a nice insulation inside the door, I think they are 16 and I remember 13 things in the back & nbsp;