Resonix Fiber Mat experiences? Can't decide between the 25 and 45.

Hey all, I've been going down the rabbit hole for quite some time in trying to figure out what I want to do to make it quieter in the cab. My primary goal is noise reduction, rather than getting more out of my audio system.

I'm pretty sure I want to go the Resonix route. Pricey, but high quality and lots of good independent testing. I've emailed the owner Nick and he said that for my situation (just wanting to do the doors and rear wall, not the floor) I'm better off doing CLD Squares and either Fiber Mat 25 or Fiber Mat 45. The idea is that thicker is better, unless it gets compressed.

Does anyone have experience with the Resonix Fiber Mats? I'd love some advice on how much of the 25mm vs 45mm stuff I should get.

Thanks in advance!

 

Personally while I haven’t used these , Looking at the products imo I’d use the cld squares. On the doors is your plan on putting on the door or the back of the door panel? I ask cause I think the issue would be putting the door panel back since the 25 is basically 1”’thick and the 45 is 2” thick +\- a mm or so.

 

Right, on the inside of the door panel. Nick at Resonix has an amazing write-up here. The idea is to use the CLD squares to minimize the sound of the vibrations of the metal itself (from wind, etc.) and then to use Fiber Mat to diminish the actual sound of the wind and road noise. Nick mentions that I definitely will be doing both, just a matter of determining which thickness for the Fiber Mat. If I don't find any answers here, I'm probably going to order one of each and then just order more of what I need once I see how it fits.

Here's what Nick specifically says about Fiber Mat in the doors and rear deck (I'm doing the rear wall, but close enough for my application):

"Doors – Please note, Fiber Mat 45 is only for some vehicles. Most will only be able to fit Fiber Mat 25 – In between door panels and the inner door skin as a decoupler, replacing commonly used closed cell foam to eliminate pesky rattles from the doors. It also acts as an absorber here for outside wind/tire/road noise, as well as astray midbass frequencies from door-mounted speakers.

Rear Decks – In between rear deck panels and the metal underneath. This serves as an excellent decoupler here to eliminate rattles which cause muddy and distracting bass from trunk-installed subwoofers. If Fiber Mat 45 Fits here in your vehicle, use that instead."