Hello, I would like to acoustically insulate my car (mazda 3 bm). I would like to say that it is quieter in the interior. Driving noises are reduced. I’m not concerned about the music sounding better. I’ve read a lot about alubytul and flow on the internet. But there’s always talk about improving the bass and so on. But that’s interesting to me, 0.0. Found a video here where the gentleman says the alubytul ect is not so suitable https://youtu.be/bJIWSjg7IHE What exactly he is using now et I didn’t quite understand either. Does somehow seem to be a science for itself. Especially since I don’t want to suck in some condensation water and cheat there. Does any of you experience can help further how to do it best? Greetings