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Felt material around tweeters, why not in more speakers?

Posted by Sean H (A) on July 29, 2002 at 09:53:52

We've seen the tweaks you can do to minimize diffraction effects along the baffle around tweeters by way of felt, neoprene rings, etc. Damping these "diffractive-nasties" is supposed to focus the sound more, the treble, imaging. Treble is supposed to take on less hashy type qualities, sound sweeter.

Why don't we see this more in speaker designs? I only see positives in doing this. One could argue the treble might sound too damped, the tonal character of the speaker could change, maybe the voice of speaker would change too much. It doesn't make much sense to me that voicing a speaker by way of factoring in characteristics of baffle diffraction makes much sense. Is it the time consuming task of applying felt to a design versus cost that turns designers off?

I have a pair of Paradox 1's, which I like very much. They are not nearly as hot in the treble as I was led to believe by some owners here at the Asylum. Actully a very accurate but musical tweeter with good equipment. However, due to my personal tastes and my room aberrations, I am going to experiment with applying some felt around the Focal tweeter on the Paradox 1's after having an enlightening experience yesterday. I had applied some thick egg crate acoustic foam around the tweeter, albeit way grossly overboard- but just a fun experiement, and found that the treble took on not only a more focused quality but a very smooth and musical quality as well. So I plan to try some felt for fun to see what happens.

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