Dynamat worth it ? - quoted $450 from audio shop

DEpointfive0

I've given up and found God. I'm going to rip out my GTMat (I don't recommend them because they fired one of our members) and I'm replacing it with high density gun case foam with either VHB or contact cement to hold it down. Definitely absorbs more road noise and weighs less overall.

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Chuck33079

Try a layer of thin closed cell foam over the deadener. It makes all the difference.

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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

DEpointfive0

Then I have the weight of both.


When I originally installed it I laid down a nice layer of Plastidip for a few reasons, I figured it would "fill in" the gaps where I couldn't lay down the GTMat, it would be a 100% layer without air pockets and such, and in case I ever had to remove the GTMat, it would be MUCH easier with the PD... (The way these sound deadened work is by taking away or minimizing tibre [someone correct the spelling] so the trunk is like a drum, and this is rubber absorbing the vibration. PD is rubber to absorb more vibration [in my mind])

Glad it paid off, now I'll take off the GTMat and lay down a new layer of PD then put the foam on the PD.

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Chuck33079

The foam weighs next to nothing. It's 1/8" thick and self adhesive.

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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

DEpointfive0

Very true, but I think the dynamat might be redundant with the foam

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Chuck33079

Not at all. Here's a better explanation from the website I got it from:

" this works in higher frequencies to reduce reflections by breaking up, diffusing the energy, decouples vibrations, and is a superb thermal barrier.The only place to limit the use is behind speakers, just use a patch 8x8" or so to break up the back wave, it is so effective more will just kill off the midbass response which is not what we want to acheive."

I've done cars with just dynamat, and the Z with both. It's by far better with the foam.

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2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

90 ST

The point of adding mat is to add weight, thus less vibration...
I have used a few different types over the years, this is not something you want to cheap out on in your car, a lot, of the cheaper mats are asphalt based, STAY AWAY from them, in the summer they smell!
The best one I've used is Hush Mat, price is not cheap, but with mat, you get what you pay for. Very easy to install, other then my Z I use Hush Mat only. I was working for Streetwires at the time, so I had to use it, however it too was nice product to work with, but again, not cheap.

JARblue

See my avatar

Yeah I'm pissed about that because their Onyx line seemed to be a pretty decent product. I did my hatch, but haven't done anything to the doors yet.

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