Broadband absorber behind the speakers?

barefoot · Post by **barefoot** » Mon Sep 18, 2006 6:24 am

Ethan Winer wrote: I think the general rule of thumb is that once the output is 10 dB down, comb filtering is reduced to an "acceptable" level. Using your own speakers as an example, at what frequency is the rear radiation 10 dB down?

About 500Hz.

Though, I wouldn't call the potential +/- 3dB response anomalies "acceptable".

Ethan Winer · Post by **Ethan Winer** » Tue Sep 19, 2006 5:39 am

Thomas,

> About 500Hz. Though, I wouldn't call the potential +/- 3dB response anomalies "acceptable". <

I agree, and again I'm not opposed to anything that improves the response. Indeed, the main point of my Front Wall Absorption article is the avoid thin absorption. I cringe when I see people line their entire room with 703 only one inch thick.

I still maintain that in the grand scheme of things, when someone has a finite budget for acoustic treatment or a wife that objects to a lot of panels, the front wall is third in the list of importance.

--Ethan