Accessories

Works Great, but not wonders
I purchased 2 dynamat xtreme door kits and 2 (12sq) dynaliner to do all doors in my 2006 maxima and the rear deck. So far, I completed three doors and there is plenty left for the last door and rear deck.

Results:
There is a big difference...no rattles when I am listening to my music. Now you could hear tighter bass and clear highs. Of course, now the doors have that nice heavy feel to them, and close with a nice "thump".

The road noise did decrease, but not as much as I wanted. I guess if I used multiple layers and covered every inch of metal, it would probably make a bigger difference.

I was more concerned with rattles that ruined my music listening experience, and dynamat performed great in that department.

Overall: I highly recommend.

Worthless
I started with the speaker packs. I saw very little result. Then dynamat said, well you really need to do the whole door, so I did. $400 later, I still have as much road noise as before and I covered my entire door frame on all 4 doors.

Don't buy in to the hype. I know it sounds good, but the people who got results are just idiots who believe everything the are told. "Miller lite is good beer, isn't it Johnny? See the pretty women on TV, you'll get them too if you drink Miller Lite." "Duh... Yes... lite beer is good.."

Rattles are for babies
This has a lot of uses beyond car applications. I used a sheet of it on the drywall behind in-wall speakers to cut the amount of sound radiating through the back wall and tighten the sound. I used a sheet of it inside a computer case, to eliminate a tinny rattle that came from the case vibration while it was on. You can even put pieces of it on the inside of washing machine or dryer panels to make them quieter.

It does have one drawback, and that's the fact that once you stick it on something, you will not be able to get it off without making a big mess. It is essentially tar with a foil outer cover, and trying to get it off just leaves a bunch of sticky tar behind. So, choose the place you want it carefully before sticking it down!

Not Impressed!!!!!!!!!!!!!!
This is one of the many extra packs I purchased, trieng to get rid of sound vibrations in my car...............Never worked how I expected. This is not a miracle product........

it makes a difference
I did a complete install myself over a period of 5 days. After the first 2 days I had all the doors stripped down to the metal and one side of the truck covered with the Dynamat and the other was not. Driving down the road with no radio on the sound difference was amazing. I could hear almost no road noise or vibration from the Dynnmated side.