Nousaine...as in Tom Nousaine?

I remember the issue you're talking about and I've always defended my
position that Dynamat does nothing for road noise...but most people think
otherwise.

However, good Dynamating (or the generic equivalet) and/or a visco-elastic
spray works excellent to reduce vibrations and resonations in the door
cavity. In essence, if done correctly, this will be the next-best thing to
an actual speaker "enclosure" made out of your door. I highly recommend it
for those who spend the money for any high-end speaker. Otherwise, you're
wasting your money.

And I would totally recommend Dynaudio. Their model 360 set is a 3-way with
an 8-inch mid-woofer, 3-inch midrange, and 1-inch tweeter. Mount it any way
you want, but my preferred method is for the tweets and midranges in kick
panels and the 8s in the doors. Keep in mind that your other components
need to be fairly high-end as well, to truly enjoy the speakers' full
potential.

http://www.dynaudiona.com/products/car/car1.htm

And Tom...if that's you...I've been a LONG time fan of your reviews. Keep
up the good work!

Tony



--


What's more likely? That an all-powerful mysterious god created the
universe and then decided not to give any proof of his existence? Or, that
he simply doesn't exist at all? And that we created him so that we wouldn't
have to feel so small and alone. -Eleanor Arroway, Contact
"Nousaine" wrote in message
...
"Tim Louquet"
wrote:


The truck has a "sound deadening package" installed from the factory
which
essentially insulates the engine compartment, but it does not insulate
the
doors/interior. I will most likely try to Dynamat the doors to help with
the noise issues.

--
Tim

There's not much gold to be mined there. In 1993 I tested a 2-step Dynamat
installation on my new Z-28.

The 1st step, all work was done by a Dynamat recommended car restoration
service, included a layer in the doors and a layer on the floor from the
firewall tothe rear hatch area.

The 2nd "Pro-Install" step put a 2nd layer on the areas included in the
first
step and also a layer on the entire hatch area. Total cost to Car Stereo
Review
was $1600.

I made three complete sets of measurements (before and after each step) at
idle, and 35-mph and 55-mph on smooth and rain-grooved pavement on the
same
stretches of road, same days of the week at the same time of day. Each set
included an average of 5 runs eachand covered the full spectrum (not just
a
single SPL reading) with a MLSSA acoustic analyzer.

The resultant noise reduction? Nada except for a slight reduction in tire
whine
in rain-grooved pavement.

Why? There's just not enough mass to significantly attenuate noise. The
obvious
stuff like open holes and the like have been attended to at the factory.
If
you're luck you might find through sound leaks in your doors. But you just
need
to seal those, you don't need Dynamat for that.

Window/door weather/wind seals are usually a better place to look. Also
make
sure your vehicle has a hood liner but it sounds like it already does.