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Old 17th June 2009
  #5
JWL
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Agreed, without specs it's impossible to say. But I'm skeptical, generally absorbent material used for acoustic panels are made from fiberglass, rockwool, or cotton. The fact that specs aren't readily available makes me even more skeptical.

Do you want to be a guinea pig, and spend money, time and effort on an unknown, or stick with proven materials?