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RE: Question About The Effects of Damping Materials In the Compression Chamber of a BLH

'Parts Express makes a product called Sonic Barrier, that looks to be of similar construction to Black Hole 5. Its only a three layer design, versus four of the BH5, but its far more reasonably priced.'

Products of that sort work well if the enclosure is made of sheet metal, ie., a car door. They're totally without merit in a real enclosure IMO. All you're trying to do is absorb internal upper midbass and midrange reflections so they won't reflect back to the cone, causing response zits. An inch to two inches of open cell foam or polyester batting is all you need. If you're getting too much midbass out of the horn add some of your batting at the horn bends.


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