how much do you dynamat?

I am wondering about how much on the average you dynamat (or comparible product) in your car. I have done my trunk lid, and portions of my front doors. I am planning on doing the top & bottom of my rear deck, and my remaining trunk area. I just wondered if when doing installs you usually dynamat the whole body or not. Also those of you with cars with trunks, do you dynamat the coverboard for the spare tire compartment, or the entire spare tire compartment itself. Thanks All

As much as you want. The more the merrier! Each layer will provide slightly less damping capability than the previous layer, so keep that in mind...

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

I think it depends on power and number of subs, etc, stuff like that.  In my present car, I did trunk lid, trunk at the rear, parcel shelf, and every sq inch of both panels in the front doors.  My system is an 8 gauge power wire size, one sub, components and rears with 4 X 65 watts amp ( although the rears really get only about 25 watts) and the sub gets about 180 watts.

With two subs and 600 watts I would have to Dynamat a whole lot more sheet metal...sides and floor of trunk to start with.  And if I had such a system that required 1/0 gauge wire i would probably have to strip the car and double-damp every bit of sheet metal I could find.  That would make it a heavy car  ;)

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

thanks for the reply, what I am wondering is if people just listen for trouble areas (rattles, etc.) or just dynamat the entire trunk and interior of there car.

I have a somewhat similar setup to yours, a single 12" sub (solobaric L-7) in a vented enclosure, and im pushing it with around 600 watts except I use a 4-gauge power wire. I get alot of rattle from the rear bumber and under carriage, thats why I'm planning on doing the whole trunk.

So Haemphyst if you have damp your whole trunk and then you damp it again, thus double damp it, it won't be a big difference in damping? so in some words it's like wasting, time, money and damping materials? thnx.

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Shaking The Neighborhood

Aruman wrote:

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So Haemphyst if you have damp your whole trunk and then you damp it again, thus double damp it, it won't be a big difference in damping? so in some words it's like wasting, time, money and damping materials? thnx.

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Yes, and no... As I said, a single second layer will NOT give the same damping as the first layer did. It's called the point of diminishing returns. To get AN EQUAL ADDITIONAL damping effect, you must now add TWO layers of Dynamat, to the first, then FOUR to those three... and so on and so forth...

Adding only one additional layer will give you only an additional 50% of the initial layer. Adding only one more is an additional 25% of the first two...

Eventually, you WILL run into a point where it no longer makes any sense to continue adding layers, due to weight, cost, and time. BUT, I still maintain that the more damping you add, the better your results will ultimately be, even though by the time you give up, the additional benefit could be vanishingly small...

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."

oh ok, thnx Heamphyst.

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Shaking The Neighborhood