restoration

Hi, I found a pair of 30 years old, oval shaped Clarion SE-9450 4(!)-way speakers, 150W max. input from my first days with a car. I want to add them to my dad's old car on a soundboard (car is a liftback). Sadly, the foam disintegrates from just looking at it. 😃 Problem: It seems, the web has...

sound deadener advise was great