Blackhole5

Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

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In Reply to: very good speaker tweak posted by avon on May 21, 2000 at 13:29:24:

I very best material I have ever used is Blackhole5.
It takes care of the standing wave problem and the enclosure resonance problems.
It is better than simply adding addition MDF. Adding more MDF straight to the inside of the enclosure will shift the resonance to a different frequency and in some cases only reduce the resonances slightly. It also begins to reduce the air space in the enclosure.
A cheep fix it is not. We sell it for 48.00 a sheet. It's 27" by 24".
we try to keep 30 to 40 sheets of the stuff on hand. It is also very easy to install ( self adhesive backing )
Want a CHEEP solution to enclosure resonances? When you build your boxes build an inner and an outer layer of MDF. Then fill the space between them with sand. This works great for sub-woofers. However it does not address standing wave problems. For that go for some open cell foam.
Danny Richie
GR Research

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Follow Ups Full Thread

Topic - very good speaker tweak - avon 13:29:24 05/21/00 (10)

Blackhole5 - Danny 15:46:52 06/08/00 (0)

Constrained layer dampning..... - BrianG 17:56:26 05/29/00 (0)

The wrong approch - jjj 10:56:26 05/26/00 (0)

Re: very good speaker tweak - Ã† 00:22:57 05/24/00 (1)

Re: very good speaker tweak - Analogon 12:55:11 05/25/00 (0)

It's standard approach to dump vibration - Genn 02:54:20 05/23/00 (0)

Re: very good speaker tweak - jjj 00:24:26 05/22/00 (2)

sandwich better than double MDF? - Philipp 09:11:07 05/22/00 (1)

Re: sandwich better than double MDF? - jjj 06:38:04 05/24/00 (0)

an alternative? - gjm 16:40:59 05/21/00 (0)

Follow Ups

Blackhole5 - Danny 15:46:52 06/08/00 (0)

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