Kinetics Sound Damp 2 vs Green Glue

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Drumoverdubs
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Location: Lyons, Colorado
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Kinetics Sound Damp 2 vs Green Glue

Post by Drumoverdubs »

HI,
I am looking to build a new room behind my house in the foothills of Colorado. I recently came across a couple studios in the area that have used Sound Damp 2 from Kinetics. I don't see any opinions on the product on the usual forums.
Does anyone have any experience? The product has been out about 3 years or so.

I have called the company twice and have been shuffled around on the phone with no results...

Here is a link to their information on the product.

http://www.kineticshometheater.com/pdf/SoundDamp2.pdf

Thank You!
Brian
Soundman2020
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Re: Kinetics Sound Damp 2 vs Green Glue

Post by Soundman2020 »

Hi Brian,

I can't see any actual specifications for that product on the website, such as test reports from independent acoustical test laboratories, or case studies, or university white papers, or anything else. All I see is vague claims about the product: All their numbers are also expressed as STC ratings, which is pretty useless for studios. STC does not consider the bottom two and a half octaves of the musical spectrum, nor the top two and a half octaves. So talking about isolation in terms of STC ratings is no use at all for loud music in studios.

According to that brochure, adding one layer of drywall produces no change at all to the STC rating! Both of the first two diagrams are shown as STC-39, which is obviously not correct. You can't add a substantial amount of mass to a wall (increase it by 50%) and get zero change.

In reality, according to IR-761 the first wall would be rated at STC-34 (page 22), not STC-39 as claimed, and the second wall would be rated at STC-36 (pages 25), not STC-39 as claimed. Two rather large errors.
I have called the company twice and have been shuffled around on the phone with no results...
:) I wonder why?

- Stuart -
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