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<blockquote data-quote="squeak9798" data-source="post: 1204027" data-attributes="member: 555320">Most of the effective deadening comes from the first layer.&nbsp; Adding more layers results in smaller incrimental increases (~20%) in deadening of the panel.&nbsp; And obviously the higher you are in layers, the less of a realized benefit they&#039;ll contribute.But, it all comes down to the panel itself.&nbsp; If after 1 layer it still has some resonance issues and isn&#039;t satisfactorily deadened yet, obviously more layers would be needed.&nbsp; If it&#039;s dead after the first layer, more layers won&#039;t be necessary.Depends on if they resonant or not //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gifYour questions aren&#039;t yes or no questions.&nbsp; Either the panel (or area, like the plexi) is dead, or it&#039;s not.&nbsp; If it&#039;s not, then it needs more layers.&nbsp; If it is, then you can stop deadening the panel.&nbsp; And you want to deaden anything that resonants; especially in the door if that&#039;s where your speakers are.It&#039;s really that simple.&nbsp; If you question whether or not something needs deadened; tap on it and see how bad it resonants.&nbsp; Want to know how many layers you need?&nbsp; Tap on the panel after your first layers.&nbsp; Anywhere resonances are still present needs more deadening.&nbsp; After the second layer in resonant areas...tap again.&nbsp; Dead yet?&nbsp; If not, it needs more layers.And if you want to know what resonance sounds like, or how you know when a panel is dead; Basically, when you tap on a panel it should &quot;thud&quot; rather than have a reverberating ring to it.</blockquote>

[QUOTE="squeak9798, post: 1204027, member: 555320"] Most of the effective deadening comes from the first layer. Adding more layers results in smaller incrimental increases (~20%) in deadening of the panel. And obviously the higher you are in layers, the less of a realized benefit they'll contribute. But, it all comes down to the panel itself. If after 1 layer it still has some resonance issues and isn't satisfactorily deadened yet, obviously more layers would be needed. If it's dead after the first layer, more layers won't be necessary. Depends on if they resonant or not [IMG]//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif[/IMG] Your questions aren't yes or no questions. Either the panel (or area, like the plexi) is dead, or it's not. If it's not, then it needs more layers. If it is, then you can stop deadening the panel. And you want to deaden anything that resonants; especially in the door if that's where your speakers are. It's really that simple. If you question whether or not something needs deadened; tap on it and see how bad it resonants. Want to know how many layers you need? Tap on the panel after your first layers. Anywhere resonances are still present needs more deadening. After the second layer in resonant areas...tap again. Dead yet? If not, it needs more layers. And if you want to know what resonance sounds like, or how you know when a panel is dead; Basically, when you tap on a panel it should "thud" rather than have a reverberating ring to it. [/QUOTE]

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