Felt

[JerryLove]

I need felt to put around a ribbon tweeter that I am concerned is having problems with reflections.

What I don't know is "what kind" and "where to get it".

 

[highfigh]

I need felt to put around a ribbon tweeter that I am concerned is having problems with reflections.

What I don't know is "what kind" and "where to get it".

Hancock Fabrics should have something and they have stores all over. If you don't have one, I would think someone in the area sells fabric, maybe WalMart or Target.

If you want something a little thicker, go to a car audio shop and ask for trunk liner. A lot of shops use it for covering subwoofer boxes and it's un-backed, meaning that it doesn't have a plastic or rubber coating. It usually comes in black, dark blue, a few shades of gray and possibly dark red/maroon. It's cheap, too. I know it absorbs highs, because I covered a pair of speaker boxes with it and it did a great job.

 

[jcl]

From accompanying my wife in preparation for making Halloween costumes -Joann's Fabrics and I think Michaels carry felt fabric by the yard. Not sure if this is the same material as what you want for your speakers though....

 

[annunaki]

Jerry,

Any decent felt of higher density should do the trick for you. You can get scraps of the stuff dirt cheap at most any of the stores previously mentioned. They also probably have it in most any color you wish.

 

[audiofox]

You might also consider foam, which is available in a wide array of thicknesses and densities-you could even try several and pick the best based on listening tests. I'd be inclined to try some weatherstripping from my garage parts bin just to see if it works. You need something to break up the near field reflections, so anything with a similar density and absorption would probably work.

 

[HexOmega]

Jerry,

This website peddles pre-cut pieces of wool felt for a similar purpose. They are using 3/8" thick compressed wool, whatever that means.

Jo-Ann fabric has wool felt in multiple colors for ~$18/yard which is probably much more than you need.

I see you're in Tampa. There is a Jo-Ann near you in Brandon:

Jo-Ann Fabric and Craft, # 1959
11215 Causeway Blvd
Brandon, FL 33511-2903
813-655-1408
9.46 miles away

 

[annunaki]

You might also consider foam, which is available in a wide array of thicknesses and densities-you could even try several and pick the best based on listening tests. I'd be inclined to try some weatherstripping from my garage parts bin just to see if it works. You need something to break up the near field reflections, so anything with a similar density and absorption would probably work.

Foam will be a bit more difficult to do here as it will require a specific density and thickness. Not to mention it will probably not look as nice.

I would first start with the felt and see if it delivers intended results. Wool felt would be a great place to start here actually.

 

[Critofur]

I need felt to put around a ribbon tweeter that I am concerned is having problems with reflections.

What I don't know is "what kind" and "where to get it".

"F10" or "F13", probably about 1/4" thick. From McMaster Carr.

Here are some links for you:

http://www.mcmaster.com/#f13-felt/

http://www.mcmaster.com/#f10-felt/

http://www.speakerdesign.net/felt_amelioration/feltssenter.html

Note: I'm not certain about the "F10" being a good choice, just a fuzzy memory... I know the F13 is good. I also know that most stuff sold at a "craft store" (thin/maybe synthetic) is not very good for reducing audio diffraction...

Oh, also, I definately recommend experimenting with "foam wedges" like what Raal uses, start with "30 PPI open cell foam". I've probably got some little scraps I could send you if you like.