I'm about to start my audio upgrade in a few weeks and plan on throwing Dynamat in the 4 doors and complete trunk. For those that have already Dynamatted their cars, has a single layer been enough to help with a reduction in road noise?

 

No. Doors and trunk will do nothing for road noise.

You have to double up on firewall, floors, and the most noisy part of the TL....the roof!

 

That's what I was afraid of. Wondering if it will be best to go ahead and have it done while the car is torn apart. Ugh!
Is yours done in the setup you just mentioned? Curious to know how well it helped and of its worth the added expense. If be ecstatic is it was Lexus LS460 quiet, but I wouldn't hold my breath, either.

Thanks.

 

I was heavily into audio when I had my prelude and here are a few things I have learned along the way...

To effectively reduce road noise, you need proper sound deadening to to block road noise, depending on how far you want to go is up to the driver.

- Mass Loaded Vinyl, MLV, is very effective and quite thick.

- Closed Cell Foam when used in conjunction with MLV will dramatically reduce exterior noise.

- Dynamat is mainly used to reduce resonance, not noise. It will help with the bass response because of the addition of a solid foundation to metal.

- I have used CLD tiles, which is quite thicker then Dynamat and the instruction states applying it to the middle of the panel will reduce resonanace but I usually apply a bit more just to be safe, do it once do it right!

- Remember, sound/noise can leak in if there are holes in the deadening to travel through.

In my prelude, I applied a few tiles of CLD to the floors, then layed down MLV and CCF on top of it, overkill?
In the doors, I applied a few tiles on the door itself and certain parts of the door panel itself where I think will need strength, mainly around the speaker.
I then smashed together MLV and CCF together and used double sided tape and velcro to attach it onto the door.

I haven't done anything to the TL because I think the ELS system is ok as is and I don't feel like ripping apart the interior either.

 

IF you can get 3M thinsulate, it's excellent at reducing road noise

 

You would be surprised how noisy the roof is. I did the entire car and am running an IB trunk with foam cell spray. It was almost dead quiet, but then we did the roof....wow! That was night/day difference. Do it right the first time, it's not cheap but will make your TL more enjoyable.

 

Anyone know a good and reasonably priced place in los angeles that does sound deadening in cars? Thanks