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In Reply to: RE: is foam board insulation good to reduce volume of horn back chambers? posted by freddyi on October 03, 2016 at 23:11:49
I have been trying to think of a way to less the volume of my Edgar Seismic back chambers and it never occurred to me to use something like that.
All open cell foams have lots of air in them so it would only look like it was taking up space unless you sealed it thoroughly with something and nothing comes to mind that would be easy and quick.
I would think closed cell foam would do a good job though it is more expensive and I would still want to coat it with something.
The link goes to a shop that offers many varieties and some explanation of each.
No question, polystyene would not be my choice. The neoprene is expensive but would last forever.
Follow Ups:
Polystyrene looks fine to me...what's wrong with it?. Too inexpensive?.
I used construction foam of this sort as a filler in the cabinets of a pair of three way d'Appolito towers with Dynaudio drivers I built years ago. Instead of using the foam as flat slabs I laminated up layers enough to cut thick wedges of it. Then I glued in the volume I wanted in the form of triangular wedges. I can't prove that was significant but the reduction of parallel surfaces couldn't have hurt.
Edits: 10/04/16
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