Noise dampening insulation

[MikeCL]

So stock on my Subaru has the plastic cover which as I knew and found out sounds very bad with upgraded front speakers, next week I'm going to get the stuff for the door but I have two questions. Do I put any between the door skin and the inner frame? What I mean is the hollow space in-between I've seen some put some on the backside of the door.. Also because I got started later in the year will I have any issues getting the insulation to stick in sub 40F weather?

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[youdoofus]

So stock on my Subaru has the plastic cover which as I knew and found out sounds very bad with upgraded front speakers, next week I'm going to get the stuff for the door but I have two questions. Do I put any between the door skin and the inner frame? What I mean is the hollow space in-between I've seen some put some on the backside of the door.. Also because I got started later in the year will I have any issues getting the insulation to stick in sub 40F weather?

and time you can change the resonant frequency on a chunk of plastic, its not a bad idea to do so. the sub 40 degree weather thing might be an issue tho, do you have a heat gun?

 

[MikeCL]

Sorry for the long delay but yes I do have a heat gun