Dual density materials -- higher density on walls of enclosure -- lower density in center of enclosure

Posted by Richard BassNut Greene on May 11, 2007 at 08:22:50

In Reply to: Best Speaker Damping Material ? posted by ka7niq on May 8, 2007 at 12:43:23:

Specifics and test data in Vance Dickason's "Loudspeaker Design Cookbook"

I use single-density inexpensive polyester stuffing for DIY subwoofers -- eight pounds of 1.25lbs per cubic foot polyester for my two 6.5 cubic foot subwoofer enclosures (more dense does not work as well).

Polyester stuffing can be used at a density of up to 1.75 lbs. per cubic foot in smaller enclosures.

Polyester stuffing is not as efficient as fiberglas, but much nicer to work with.

Search online for an easier to read version of the article by "Mr. Subwoofer" Tom Nousaine about various polyester stuffing densities, including his measurements. The link is tough to read.
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Richard BassNut Greene
Subjective Audiophile 2007

Hard to read cut & paste version of Nousaine article (Open in New Window)

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Follow Ups Full Thread

Topic - Best Speaker Damping Material ? - ka7niq 12:43:23 05/08/07 (13)

Dual density materials -- higher density on walls of enclosure -- lower density in center of enclosure - Richard BassNut Greene 08:22:50 05/11/07 (0)

Re: Best Speaker Damping Material ? - kenster 18:29:26 05/08/07 (2)

Interesting ? - ka7niq 21:08:52 05/08/07 (1)

Re: Interesting ? - kenster 22:38:08 05/08/07 (0)

If your speakers have allergies, the change will help. - free.ranger 16:33:00 05/08/07 (0)

Re: Best Speaker Damping Material ? - The Real Dick Hertz 15:49:16 05/08/07 (2)

Re: Best Speaker Damping Material ? - ka7niq 18:19:52 05/08/07 (1)

tip: keep fibreglass away from the seat of your pants (nt) - mhardy6647 11:30:14 05/10/07 (0)

Re: Best Speaker Damping Material ? - chocolate_lover9999@yahoo.com 15:01:08 05/08/07 (0)

I remember a restaurant in FL... - Jimmy C. 15:00:03 05/08/07 (3)

It's still there... - Ed Sommer 12:46:54 05/14/07 (0)

Yes Me too.......it was in Davie there was one in Clearwater/Tampa too - I was a Wedding photog that was a great place - Joe M 18:43:11 05/08/07 (1)

Thanx... I was trying to remember where it was. (NT) - Jimmy C. 12:42:10 05/10/07 (0)

Follow Ups

Dual density materials -- higher density on walls of enclosure -- lower density in center of enclosure - Richard BassNut Greene 08:22:50 05/11/07 (0)

Dual density materials -- higher density on walls of enclosure -- lower density in center of enclosure

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