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Old 17th August 2020
  #6
Gear Nut
 

Surely the fluffy less dense material is at the front, to capture/absorb the sound's very high frequencies.

What's left then hits the harder stuff, which is more reflective of high frequencies.

Any reflected high frequencies then bounced back and absorbed by the fluffy layer.

That is how I am going to build mine.

No chance of me putting the the hard/dense stuff at the front.