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Improving tweeter clarity. Felt.

I would like to share one of my better tweaks. I bought six medium felt half inch thick polishing wheels. six inch dia. 

Then, I used a band saw, and cut square. Then I used an offhand grinding wheel, to shape the pieces, till they matched the tweeter plate. I created a funnel shape to the inside. 

My tweets are focal 120s, and I also created some CHEEKS, affixed top and bottom, as acoustic lenses. This disperses the tweet well, and then knocks down any early reflections. It protects some from intrusion of mids. Seems to create more solid soundstage. May help in other ways. 

They look like the MFG made them, and don't detract. The cheeks resemble the cheeks that focal added to the top of line. 


I don't think it horn loads, as it is absorptive, not reflective, in the funnel area. 
highfido

Showing 2 responses by erik_squires

erik_squires
15,643 posts
 
So, as I understand it, if we are talking seriously thick felt, you end up changing the radiation pattern of the tweeter. Some speakers have this deliberately built in, and use several centimeters of felt.

Others, like I use, use very thin, maybe 1/8" or less.

I think of the two as being quite different.
erik_squires
15,643 posts
 
I've used this several times, always with a positive result.

BTW, you can buy felt punches to cut perfect holes from a craft store, as well as buy pre-made from Madisound.
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