best sound deadening

[Alien Mantis]

Originally Posted by dragoonmc

I just don't want to do it and not be satisfied with the results and have to pull everything apart again

I hear that.

I see so many people just wallpaper that sound deadening material on their panels. 100% coverage.
Even the companies that SELL this stuff tell you to do that.
You know why? They wanna sell more material to you!

You don't have to wallpaper it on every square inch.

But it really depends on what you are doing, and what you expect out of it.
Competition system? Wallpaper it.
Four 12's on a 2,000w RMS amp? Wallpaper it.
Trying to make your car SILENT while driving down a rough road? Wallpaper it.

The Yaris is a compact economy car. Toyota did not spend any time or materials on "sound control" in the cabin area.
The 3-door HB Yaris is an acoustic echo chamber. It's a metal shell that transmits all the road noise right to your head.
It NEEDS some help.
It doesn't even make sense to try and do a system in a Yaris unless you are going to do something to help control the noise.
I know from experience.
I did a small system in my Yaris, and lived with it for 2 years.
Finally I had to rip the panels back out and get some Roadkill in there.
The noise was just too annoying.
I found myself constantly cranking the volume to try and drown out all the road noise. Crazy.