Has anyone on here experimented with felt in reducing or eliminating baffle diffraction? I have a situation where I have to have a large baffle and was thinking of just using a ton of felt covered in grill cloth or something to eliminate the diffraction. Would having the baffle back about an inch from the speaker front and fill that gap with felt, would that help? This is what I am currently thinking as otherwise it would be a wide baffle of about 16" x 29" wide open baffle.
The speaker is going to go into a cabinet so I would think a large baffle would be better than a slim speaker in a cabinet, yes? Maybe this should be in Construction Tips? If so feel free to move!
The speaker is going to go into a cabinet so I would think a large baffle would be better than a slim speaker in a cabinet, yes? Maybe this should be in Construction Tips? If so feel free to move!
I feel it would only be effective at very very high frequencies due to the felt not being very thick. And if it functioned it might make baffle step compensation more difficult to deal with.
10mm thick felt helps a lot decrease reflections from 2,5kHz upwards.
Best example Sica TC-50, one of the best stereo image two way speaker until today.
Best example Sica TC-50, one of the best stereo image two way speaker until today.
Here's a thought, would it be better for the driver to be recessed into the baffle, felt or for the driver to be positioned forward relative to the hard part of the baffle? with an extension tube or something similar to be flush with the front of the felt material if it is at the target 1/4 wavelength required.
This some 1/4 incl felt I stuck around full range drivers " sunk " into the baffle. I've got no idea if it made a lick of difference.
OC 703 duct board, so pick what you want/need/can live with, then find its felt thickness equivalent, so guessing thick pillow depth.
Courtesy of buyinsulationproducts.com
Courtesy of buyinsulationproducts.com
Well I don't want to have fiberglass exposed! I won't use Fiberglass insulation in my house, I work in attics and ewwwww. Anyway this is an interesting chart, it shows that the 2" is just as effective as the 4" in reality. I would assume 1" would be pretty decent. Is Mineral Wool similar to felt, like an F11 or F10?
This damping doesn't simply take away diffraction, it acts to take away the baffle that was preventing it, thus creating it.
Who said you did or even suggest anyone use it? Personally have used it since age 10 in speakers and my house is stuffed with it, but nowadays just use it for a comparison.
The only mineral wool I'm familiar with is the thick kind historically used as a super plush carpet underlay and its 1" ~ = 703 1".
No joy finding any though, but its replacement has similar specs only thinner and more decorative.
The only mineral wool I'm familiar with is the thick kind historically used as a super plush carpet underlay and its 1" ~ = 703 1".
No joy finding any though, but its replacement has similar specs only thinner and more decorative.
I have seen that and it shows pretty good results, I was just wondering if anyone used it more extensively or all to time with good results
https://audioxpress.com/article/Diffraction-Doesn-t-Have-to-Be-a-Problem
Felt definitely adds "sharpness" to my ears.
Foam is cheap to try.
12' x 12" f10 felt 1/2" can run over $40, but may be enough to do 2 bookshelf speakers.
Felt definitely adds "sharpness" to my ears.
Foam is cheap to try.
12' x 12" f10 felt 1/2" can run over $40, but may be enough to do 2 bookshelf speakers.
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But if the felt was thick enough would it not interfere with the off axis response, although probably insignificant?
Article State that for midrange, diffraction is not that bad/pronounced. Can say that is NOT True/fake fact. Everyone Can test for themselves in Edge. Also article miss to show How response look like of axis ie. Polar response.
Else IMO cool article.