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High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
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In Reply to: Re: Interesting question posted by David Yost on February 2, 2006 at 12:00:23:
I don't have any direct experience with felt on the baffle, but it seems feasible that felt on the baffle would help. And we have seen this quite often in the past. The question is how effective? This kind of material has an absorption coefficient that theoretically goes to zero at grazing incidence so nothing gets absorbed. Although there is clearly some absorption and hence less diffraction I would not guess as to how much. A small baffle means less total absorption of the wave but a shorter delay to the edge while a bigger baffle means more absorption but a longer delay to the edge. Its a tough call to say which is better.I use foam in several ways. First the foam within the waveguide absorbs the diffraction and reflections MORE than it absorbs the desired wave. Thats because the diffraction travels farther. So there is a net gain here. The foam also helps to reduce the diffraction of the woofer waves off of the waveguide opening which would normally be a serious diffraction point. But the woofer only plays below 1 kHz. The more serious problem is the diffraction of the waveguide off of the woofer cavity. I'm looking at grilles etc. to see if this makes a difference.
These all seem to be beneficial to a degree and from my experience everything helps, but the corner radius is going to be by far the most effective by not diffracting the waves at all.
Earl Geddes
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Follow Ups
- No experience - EGeddes 02/2/0612:42:36 02/2/06 (3)
- Re: No experience - David Yost 14:08:23 02/2/06 (2)
- Me too - EGeddes 14:44:20 02/2/06 (1)
- Re: Me too - David Yost 05:15:09 02/3/06 (0)
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